TM
Peak Ā®
HERBICIDE
For weed control
in grain sorghum
(milo), wheat,
barley, rye, oats,
triticale, and
proso millet
KEEP OUT OF REACH
OF CHILDREN.
Active Ingredient:
CAUTION
Prosulfuron: 1-(4-methoxy-6-methyl-
See additional precautionary
triazin-2-yl)-3-[2-(3,3,3-trifluoropropyl)-
statements and directions
phenylsulfonyl]-urea . . . . . . . . . . . . . . 57.0%
for use inside booklet.
Other Ingredients: 43.0%
Total: 100.0%
Peak is a water-dispersible granule.
NCP 763B-M9C 1199
EPA Reg. No. 100-763
EPA Est. 100-LA-1
Product of Switzerland
Formulated in the USA
15 OUNCES
This product is filled by weight not
NET WEIGHT
by volume.
DIRECTIONS FOR USE AND CONDITIONS OF SALE AND WARRANTY
IMPORTANT: Read the entire Directions for Use and the Conditions of Sale and Warranty before using
this product. If terms are not acceptable, return the unopened product container at once.
CONDITIONS OF SALE AND WARRANTY
The Directions for Use of this product reflect the opinion of experts based on field use and tests. The direc-
tions are believed to be reliable and should be followed carefully. However, it is impossible to eliminate all
risks inherently associated with use of this product. Crop injury, ineffectiveness, or other unintended conse-
quences may result because of such factors as weather conditions, presence of other materials, or the
manner of use or application all of which are beyond the control of Novartis Crop Protection, Inc. or the
Seller. All such risks shall be assumed by the Buyer.
Novartis warrants that this product conforms to the chemical description on the label and is reasonably fit
for the purposes referred to in the Directions for Use subject to the inherent risks referred to above.
Novartis makes no other express or implied warranty of Fitness or Merchant-
ability or any other express or implied warranty. In no case shall Novartis or the
Seller be liable for consequential, special, or indirect damages resulting from the
use or handling of this product. Novartis and the Seller offer this product, and the Buyer and user
accept it, subject to the foregoing Conditions of Sale and Warranty, which may be varied only by agree-
ment in writing signed by a duly authorized representative of Novartis.
DIRECTIONS FOR USE
It is a violation of federal law to use this product in a manner inconsistent with its labeling.
Do not apply this product in a way that will contact workers or other persons, either directly or through drift.
Only protected handlers may be in the area during application. For any requirements specific to your State
or Tribe, consult the agency responsible for pesticide regulation.
NCP 130-763B-M9C
PeakĀ®
AGRICULTURAL USE REQUIREMENTS
Use this product only in accordance with its labeling and with the Worker Protection Standard, 40 CFR
part 170. This Standard contains requirements for the protection of agricultural workers on farms, forests,
nurseries, and greenhouses, and handlers of agricultural pesticides. It contains requirements for train-
ing, decontamination, notification, and emergency assistance. It also contains specific instructions and
exceptions pertaining to the statements on this label about personal protective equipment (PPE). The
requirements in this box only apply to uses of this product that are covered by the Worker Protection
Standard.
Do not enter or allow worker entry into treated areas during the restricted-entry interval (REI) of
12 hours.
PPE required for early entry to treated areas that is permitted under the Worker Protection Standard and
that involves contact with anything that has been treated, such as plants, soil, or water is:
ā? Coveralls
ā? Waterproof gloves
ā? Shoes plus socks
FAILURE TO FOLLOW THE DIRECTIONS FOR USE AND PRECAUTIONS ON THIS LABEL MAY RESULT
IN POOR WEED CONTROL, CROP INJURY, OR ILLEGAL RESIDUES.
GENERAL INFORMATION
Peak is a selective herbicide applied after emergence of both crop and weeds for the control of broadleaf
weeds in grain sorghum, winter wheat, spring wheat, barley, rye, oats, triticale, and proso millet. In addition,
preemergence applications can be used in some areas for broadleaf weed control in sorghum. Peak is a
water-dispersible granule formulation which must be thoroughly mixed in water and applied as a spray.
Refer to Tables 1 and 5 for a listing of weeds controlled when Peak is applied postemergence. The degree
of weed control resulting from application of Peak is dependent upon weed species, weed size at applica-
tion, rate of Peak applied, and growing conditions. Weed control is optimum when ample soil moisture exists
and weeds are actively growing.
Peak provides control or partial control of many broadleaf weeds. When reference is made to weeds
partially controlled, partial control can mean either erratic control from good to poor or consistent control at
a level below that generally considered acceptable for commercial weed control. Peak does not control grass
weeds; therefore, if grasses are expected, a grass herbicide (such as Dual II Ā®, Dual II MAGNUM Ā®, Bicep
Lite II Ā®, or Bicep Lite II MAGNUM Ā® preemergence in sorghum) should be applied.
Throughout this label, where rate ranges are listed, use the lower rate of Peak when weeds are in the
middle or shorter portion of the recommended size range and the infestation is light or moderate. Use a
higher rate of Peak when weeds are in the taller portion of the recommended size range or the infestation
is heavy, and when a longer duration of weed control is desired.
Growth of susceptible weeds is inhibited soon after application of Peak. The leaves of susceptible plants turn
yellow, red, or brown after several days, followed by death of the growing point. Complete plant death occurs
1-3 weeks after application, depending upon weed species and growing conditions. Weeds not completely
killed by Peak are often stunted and are less competitive to the crop. Following postemergence applications,
Peak provides residual/soil activity for up to 4 weeks.
This herbicide controls weeds by inhibiting a biochemical process which produces certain essential amino
acids necessary for plant growth. The inhibited enzyme system is acetolactate synthase (ALS). Occurrence
of ALS-resistant weed biotypes can be prevented or delayed by using this product in tank mixtures or in
sequence with other herbicides having a different mode of action, and by using some form of mechanical
control or a herbicide with a different mode of action to control weed escapes before they set seed.
Peak applied in accordance with this label rarely causes crop injury. When injury occurs, it is generally of
short duration and yield potential is not affected.
Restrictions: To avoid possible illegal residues: (1) Do not graze or feed forage from Peak-treated crops to
livestock until 30 days after application. (2) Do not harvest silage until 40 days after application. (3) Do not
harvest grain until 60 days after application. (4) Do not apply more than 1 oz./A of Peak in the cropping
season. (5) Complete all Peak applications before sorghum exceeds 30 inches in height or before head
emergence; or before small grain cereal crops have the second node detectable in stem elongation.
Do not use Peak in the San Luis Valley of CO. In WA, abide by all sulfonylurea aerial application rulings in
effect by the Washington Department of Agriculture.
Weed Resistance to Sulfonylurea Herbicides
In some fields, there are naturally-occurring biotypes of kochia, Russian thistle, chickweed, prickly lettuce,
and annual ryegrass that will not be controlled by sulfonylurea herbicides.
Control of these weeds may be excellent with the use of Peak in many fields; but, where there is the known
occurrence of ALS-resistant biotypes, Peak must be tank mixed or applied sequentially with an appropriate
registered herbicide having a different mode of action* (such as 2,4-D; MCPA; Banvel Ā®, Bronate Ā®, Sencor Ā®,
or Buctril Ā®) to insure control of these ALS-resistant biotypes.
*Mode of action is the biochemical mechanism for interfering with plant growth.
PeakĀ®
The occurrence of ALS-resistant weed biotypes can be prevented or delayed by using Peak in tank mixtures
and/or in sequential applications with a registered herbicide having a different mode of action, and by not
allowing weed escapes to flower. Post-harvest tillage or application of a herbicide with a different mode of
action must be made to control any weed escapes before they flower or set seed. If weeds will flower before
harvest, make a sequential application of an appropriate herbicide with a different mode of action from Peak.
A list of herbicides with the same mode of action as Peak can be obtained from your local Novartis repre-
sentative.
Do not use Peak alone in any field where ALS-resistant biotypes of any weed species have been identified.
Because of the prevalence of resistant kochia and Russian thistle biotypes in ID, WA, MT, SD, and ND, in
these states Peak must be applied postemergence only in combination with a herbicide having a mode of
action different from Peak, or preemergence followed by a postemergence application of a herbicide having
a mode of action different from Peak.
In CO and the Panhandle of NE, use Peak postemergence in combination with a herbicide having a differ-
ent mode of action if kochia or Russian thistle are prevalent. See Novartis literature or contact the local
representative for suggested tank mix partners.
An application of a herbicide with a different mode of action from Peak, or a tillage operation, must be made
to control any weeds before they flower that may be present in fallow cropland treated with Peak.
Do not apply Peak or other herbicides with the same mode of action within a 12-month period after a Peak
application, except for split applications as described below. If additional weed control is needed, use a her-
bicide with a different mode of action from Peak.
APPLICATION PROCEDURES
Ground Spray Equipment: Spray nozzles should be uniformly spaced and of the same size, and should
provide accurate and uniform application. Use spray nozzles which provide medium droplets.
To help assure accuracy, calibrate sprayer at the beginning of the season before use and recalibrate fre-
quently. For ground application, use a minimum of 5 gals. of water per acre. Higher volumes (i.e., at least 20
gals./A) should be used for severe weed infestations to ensure adequate spray coverage. Always include
crop oil concentrate or nonionic surfactant in the spray mixture (see the Mixing Instructions section which
follows).
Use a pump with capacity to: (1) maintain 35-40 psi pressure at nozzles and (2) provide sufficient agitation
within the tank to keep product in suspension. Lower pressures may be used with extended range or drift
reduction flat fan nozzles. A centrifugal pump which provides shear action for dispersing and mixing the
product is recommended. The pump should provide a minimum of 20 gals./minute/100 gals. tank size
circulated through a correctly positioned sparger tube or jet agitators. If jet agitators are used, at least 2
agitators should be aligned on the bottom of the tank pointing toward each end. Agitation during both
mixing and application is essential. Screens or strainers placed on the suction side of the pump should be
16-mesh or coarser. Do not place a screen in the recirculation line unless a roller or piston pump is used for
spraying the solution. Use 50-mesh or coarser screens between the pump and boom, and when required,
at the nozzles. Check nozzle manufacturerās recommendations.
Good weed coverage with the spray mixture is essential for optimum weed control results. Observe sprayer
nozzles frequently during the spraying operation to ensure that the spray pattern is uniform. Avoid large
spray overlaps which result in excessive rates in the overlap areas. Also, avoid application under conditions
when uniform coverage cannot be obtained or when excessive spray drift may occur. To reduce spray drift,
do not apply under windy conditions. Allow adequate distance between target area and desirable vegetation
to prevent drift to nontarget areas. Avoid placing nozzles directly over the row and concentrating spray into
the sorghum whorls. Boom height for broadcast over-the-top application should be based upon the free-
standing height of the crop, not height above the soil surface; and should be at least 15 inches above the
crop.
Peak can be applied to the crop postemergence over-the-top or directed. In row crops, if the crop canopy
would prevent adequate weed coverage, apply Peak with drop nozzles directed onto the weeds.
Avoid all direct or indirect contact (such as spray drift) of Peak with crops other than those recom-
mended for treatment on this label, since injury may occur.
Chemigation: Do not apply this product through any type of irrigation system.
Aerial Application: Apply Peak in water using a minimum spray volume of 2 gals./A. Include crop oil con-
centrate or nonionic surfactant in the spray mixture (see following Mixing Instructions). Avoid application
under conditions where uniform coverage cannot be obtained or where excessive spray drift may occur.
Make applications at a maximum height of 10 ft. above the crop with low-drift nozzles at a maximum pres-
sure of 40 psi and wind speed not exceeding 10 mph to help assure accurate application within the target
area.
Avoid application to humans or animals. Flagmen and loaders should avoid inhalation of spray mist and
prolonged contact with skin.
Do not apply Peak by aerial application in New York state.
PeakĀ®
Recommendations to Avoid Spray Drift
As with all crop protection products, it is important to avoid off-target movement. Do not allow spray to drift
onto adjacent land or crops, as even small amounts may injure sensitive plants. When drift may be a
problem, take steps to reduce spray drift, including:
ā? Do not spray if wind speed is 10 mph or greater. Do not spray if winds are gusty. If sensitive crops or
plants are downwind, extreme caution must be used under all conditions.
ā? Use extreme caution when conditions are favorable for drift (high temperatures, drought, low relative
humidity), especially when sensitive plants are located nearby.
ā? Do not apply when a temperature inversion exists. If an inversion condition is suspected, consult with
local weather services before making an application.
ā? Further reductions in drift can be obtained by:
1. Using nozzles that provide a uniform droplet size. Do not use nozzles that produce extremely small
droplets that are more prone to result in spray drift.
2. Applying as close to target plants as practical to obtain a good spray pattern for adequate coverage,
while maintaining a minimum boom height of 15 inches over the crop canopy.
Mixing Instructions
1. Make sure the spray tank is clean before using. If it is contaminated with other materials, mixing
problems and/or clogging may occur, or injury to the crop may result.
2. Prepare no more spray mixture than is required for the immediate operation.
3. Fill the spray tank 1/4-1/2 full with clean water and begin agitation. For applications to small grain
cereals, liquid fertilizer may replace part or all of the water as carrier.
4. Make certain that the agitation system is working properly and creates a rippling or rolling action on the
water surface. Maintain agitation throughout the mixing and spraying process.
5. Add all products packaged in water-soluble film to the tank at the same time. Allow the packets to com-
pletely dissolve and the contents of the packets to fully disperse. Important: Water-soluble packets
must always be the first material put into the spray tank after water.
6. Maintain agitation and continue filling the spray tank. Add the appropriate amount of Peak and allow the
product to completely dispense into the mix water.
7. While maintaining agitation, continue filling the spray tank. When the tank is 3/4 full, add any tank
mix partners. If AAtrex Ā® (atrazine), Banvel, Banvel SGFĀ®, Bronate, Buctril, Buctril + atrazine, Marks-
man Ā®, MCPA, Sencor, or 2,4-D is desired as a tank mix partner, add it next while continuing to agitate.
Do not use crop oil concentrate as the spray adjuvant or add liquid nitrogen when using Banvel, Banvel
SGF, Bronate, Buctril, Buctril + atrazine, Marksman, MCPA, Sencor, or 2,4-D tank mixtures, i.e., use only
nonionic surfactant.
8. For postemergence applications, then add either (a) a high quality petroleum- or vegetable-based crop
oil concentrate containing not less than 12% emulsifier at 1-4 pts./A as specified on the oil adjuvant
label, or (b) a good nonionic surfactant with a minimum of 80% of the constituents effective as a spray
adjuvant, at the rate of 1-2 qts./100 gals. of spray mixture (0.25-0.5% volume/volume). Liquid nitrogen
fertilizer (28-34%) at 0.5-1 gal./A or 2 lbs./A spray grade ammonium sulfate may also be added to
enhance activity. Liquid nitrogen should not be used as a substitute for crop oil concentrate or nonionic
surfactant. Do not use liquid fertilizer as the total spray carrier on sorghum; that option is for
small grain cereals only. When liquid fertilizer is used as the spray carrier, a nonionic surfactant
should be included as described above. Do not use crop oil concentrate when liquid fertilizer is
the carrier.
9. Complete filling the tank, maintaining sufficient agitation at all times to ensure surface action until the
spray tank mixture is uniform.
10. An anti-foaming agent may be added to reduce excessive foaming, if it occurs.
11. Do not leave spray in the spray tank without continuous agitation. Always maintain agitation to
avoid separation and build-up of undesirable residues on the walls of the spray tank.
12. Make only sufficient spray mixture which can be used the day in which it will be sprayed; however, Peak
will remain active in the spray solution for at least 36 hours.
Cleaning Equipment after Application
Because some broadleaf crops are extremely sensitive to low rates of Peak, special attention must be given
to cleaning equipment before spraying a crop other than those registered for use and on this label. Mix
only as much spray solution as needed. Immediately after spraying, clean equipment thoroughly using this
procedure:
1. Flush tank, hoses, boom, and nozzles with clean water.
2. Prepare a tank cleaning solution of one gal. of household ammonia per 50 gals. of water. Do not use
chlorine-based cleaners, such as Clorox Ā®.
3. When available, use a pressure rinser to clean the inside of the spray tank with this solution. Take care
to wash all internal parts of the tank, including the inside top surface. Completely fill the sprayer with
the cleaning solution to ensure contact of the cleansing solution with all internal surfaces of the
tank and plumbing. Start agitation in the sprayer and thoroughly recirculate the cleaning solution for
at least 15 minutes. All visible deposits must be removed from the spraying system.
PeakĀ®
4. Flush hoses, spray lines, and nozzles for at least one minute with the cleaning solution.
5. Dispose of rinsate from steps 1-3 in an appropriate manner. Spray the cleaning solution on an
untreated crop on which Peak is registered, or return to a rinsate tank for later use as make-up water
for spraying crops on which Peak is registered, or use other approved disposal.
6. Repeat steps 2-5.
7. Remove nozzles, screens, and strainers and clean separately in the ammonia cleaning solution after
completing the above procedures.
8. Rinse the complete spraying system with clean water.
Note: If the tank is equipped with the proper number of correctly mounted 360Ā° tank washing nozzles
which are attached to a dedicated rinsing system, less cleaning solution than a full tank may be used.
Use sufficient cleaning solution to thoroughly rinse all surfaces. Start the sprayer agitation and recircu-
late the cleaning solution for at least 15 minutes. Flush the spray boom with the cleaning solution.
Repeat the rinsing procedure 1-2 times.
GRAIN SORGHUM (MILO)
Peak controls many broadleaf weeds, including triazine-resistant biotypes, in grain sorghum.
Postemergence Application (in all sorghum growing areas)
Postemergence application should be made to sorghum at the rates and timings recommended in Table 1.
Refer to the Rotational Crops Following Applications of Peak section regarding limitations for planting
certain rotational crops at the higher application rates. If weeds are larger than the optimum size range
recommended, only partial control may be obtained. For optimum control, if cultivation is to be used,
cultivation is recommended 7-14 days after application of Peak.
Peak may be applied postemergence (over-the-top or directed) to actively growing sorghum between 5 and
30 inches in height and prior to head emergence. Within that broad window of application, it is more impor-
tant to time applications to the optimum weed heights listed in Table 1, rather than crop height. Applications
made to sorghum which is less than 5 inches tall increase the likelihood of crop injury. To insure good spray
coverage of weeds, applications made after the sorghum is 20 inches tall should generally be directed or
semi-directed using drop nozzles. In drier climates, crop oil concentrate (COC) is the preferred additive,
instead of nonionic surfactant, when applying Peak alone.
Postemergence Tank Mixtures (in all sorghum growing areas)
Peak may be applied in various tank mixtures for weed control in sorghum: (a) to include a different mode
of action herbicide to help prevent or manage resistant weed biotypes; (b) for improved control of weeds
not fully controlled by Peak alone; or (c) to control weeds which are larger than the optimum size range in
Table 1.
Table 1: Weeds Controlled with Peak Applied Postemergence on Grain Sorghum
Sorghum
Tank Mix Standard Enhanced
Rate Rate Rate
(0.5 oz./A) (0.75 oz./A) (1.0 oz./A)
Weed Size Ranges for
Weeds Controlled Optimum Control (inches)
Amaranth, Palmer (Amaranthus palmeri)** 1-4* 1-4 1-6
Beggarweed, Florida (Desmodium tortuosum) 1-3 1-4 1-5
Bindweed, Field (Convolvulus arvensis) 2-4* 2-6* 2-8*
Bindweed, Hedge (Calystegia sepium) 1-3* 1-4 1-6
Buckwheat, Wild (Polygonum convolvulus)*** 2-3* 2-4 2-5
Buffalobur (Solanum rostratum) 1-3* 1-3 1-5
1-4 1-5 1-6
Buttercup, Hairy (Ranunculus sardous)
1-3 1-4 1-6
Chamomile, Mayweed (Anthemis cotula)
Chickweed, Common (Stellaria media)** 1-3* 1-4* 1-5*
Cocklebur, Common (Xanthium strumarium)** 2-6 2-10 2-12
Devilās Claw (Proboscidea louisianica) 2-6 2-8 2-10
Eveningprimrose, Cutleaf (Oenothera laciniata) 1-4 1-6 1-8
Fiddleneck, Coast (Amsinckia intermedia) 1-3 1-4 1-6
Flixweed (Descurainia sophia) 1-6 1-8 1-10
Garlic, Wild (Allium vineale) 1-8 1-10 1-12
Henbit (Lamium amplexicaule) 1-2* 1-3* 1-4*
Horseweed (Marestail) (Conyza canadensis) 1-3* 1-4 1-6
Jimsonweed (Datura stramonium) 1-4 1-6 1-8
continuedā?
PeakĀ®
Table 1: Weeds Controlled with Peak Applied Postemergence on Grain Sorghum (continued)
Sorghum
Tank Mix Standard Enhanced
Rate Rate Rate
(0.5 oz./A) (0.75 oz./A) (1.0 oz./A)
Weed Size Ranges for
Weeds Controlled Optimum Control (inches)
Kochia (Kochia scoparia)** 1-3* 1-4 1-6
Ladysthumb (Polygonum persicaria) 1-3 1-5 1-6
Lambsquarters, Common (Chenopodium album) 1-3* 1-4 1-5
Lettuce, Prickly (Lactuca serriola)** 1-4 1-5 1-6
Mallow, Common (Malva neglecta) 1-3* 1-4* 1-5*
Mallow, Venice (Hibiscus trionum) 1-3 1-4 1-5
Morningglory, Ivyleaf (Ipomoea hederacea) 1-3* 1-4* 1-4
Morningglory, Pitted (Ipomoea lacunosa) 1-3* 1-4* 1-4
Morningglory, Tall (Ipomoea purpurea) 1-3* 1-3* 1-4*
Mustard, Blue (Chorispora tenella) 1-6 1-8 1-10
Mustard, Tumble (Sisymbrium altissimum) 1-6 1-8 1-10
Mustard, Wild (Brassica kaber) 1-6 1-8 1-10
Pennycress, Field (Thlapsi arvense) 1-6 1-8 1-10
Pigweed, Redroot (Amaranthus retroflexus)** 1-3 1-5 1-6
Pigweed, Smooth (Amaranthus hybridus)** 1-3 1-5 1-6
Pigweed, Tumble (Amaranthus albus) 1-3 1-5 1-6
Puncturevine (Tribulus terrestris) 1-4 1-6 1-8
Pusley, Florida (Richardia scabra) 1-3 1-4 1-6
Radish, Wild (Raphanus raphanistrum) 1-4 1-6 1-8
Ragweed, Common (Ambrosia artemisiifolia) 2-6 2-10 2-12
Ragweed, Giant (Ambrosia trifida) 1-3* 1-3 1-4
Sesbania, Hemp (Sesbania exaltata) 1-3 1-4 1-6
Shepherdspurse (Capsella bursa-pastoris) 1-3 1-4 1-6
Sicklepod (Cassia obtusifolia) 1-3 1-4 1-5
Sida, Prickly (Sida spinosa) 1-3* 1-3* 1-5*
Smartweed, Pennsylvania (Polygonum pensylvanicum) 1-3 1-4 1-6
Sunflower, Common (Helianthus annuus) 1-6 1-9 1-12
Tansymustard (Descurainia pinnata) 1-6 1-8 1-10
Thistle, Canada (Cirsium arvense) 1-2* 1-4* 1-6*
Thistle, Russian (Salsola iberica)** 1-2 1-3 1-4
Velvetleaf (Abutilon theophrasti) **** 1-4 1-6 1-9
Waterhemp, Common (Amaranthus rudis) ** 1-3* 1-4 1-5
Waterhemp, Tall (Amaranthus tuberculatus) ** 1-3* 1-4* 1-4
*Partially controlled or suppressed.
**Certain biotypes of this weed species are known to be resistant to this and other ALS herbicides. Where
these ALS-resistant biotypes are known to exist, an appropriate registered herbicide, active against
that weed and with another mode of action, should be used alone or in tank mixture with Peak to con-
trol those biotypes.
***Spray after true leaves have emerged; earlier applications may result in unacceptable control.
**** For optimum control, include nitrogen in the spray mixture; refer to Mixing Instructions.
Notes: (1) One CustomPak bottle of Peak contains 15 oz. Each bottle treats 15 acres at the Enhanced
Sorghum Rate, 20 acres at the Standard Sorghum Rate, and 30-60 acres at the Cereal or Tank Mix Rates.
(2) Volumetric measuring cylinders should be used only as a guide or as a container for weighing, as the
degree of accuracy varies. For more precise measurement, scales which weigh in ounces and calibrated to
at least 0.1 oz. are recommended. (3) For band applications, use proportionately less product.
Refer to Table 2 for recommended tank mixture partners, rates, weeds controlled, weed sizes, additives, and
crop stages. The tank mixtures in Table 2 will control the weeds listed in that table when treated at the growth
stage recommended, plus the weeds and weed sizes listed in the Standard Rate section of Table 1.
PeakĀ®
For all tank mixtures of Peak with other herbicides, refer to both labels for weeds controlled and application
information; and follow all restrictions and precautions on both labels. For example, if applying Peak in tank
mixture with AAtrex or other brands of atrazine, all the restrictions and rate limitations on the AAtrex
(atrazine) label must be followed if more restrictive/protective than those on this label.
Preemergence Applications Alone (in KS and NE only)
In the states of KS and NE only, Peak may be applied preemergence (during planting or within a few days
after planting, but prior to weed or crop emergence) for control or partial control/suppression of many
broadleaf weeds in sorghum.
Refer to Table 3 for recommended rates and weeds controlled with preemergence applications in sorghum.
Also refer to the Mixing Instructions section of this label, but the addition of a spray additive is not required
for preemergence applications.
Note: For effective preemergence activity, enough rainfall or irrigation is needed to wet the soil approxi-
mately 2 inches deep before weed emergence.
If for some reason a second application is desired, the maximum amount of Peak which can be applied is
1 oz./A during the cropping season. A second application may reduce rotational crop options; refer to the
Rotational Crops section of this label.
Preemergence Tank Mixtures (in KS and NE only)
In the states of KS and NE only, where Peak can be used for preemergence control or partial control/sup-
pression of broadleaf weeds in grain sorghums, Peak can be used in preemergence tank mixtures. For
broader spectrum weed control, Peak may be tank mixed with other herbicides registered for preemergence
weed control in sorghum, such as Bicep Lite II, Bicep Lite II MAGNUM, Dual II, or Dual II MAGNUM; but
note that many of those preemergence grass control products must be applied over Concep Ā® -treated
sorghum seed.
Refer to Table 3 for recommended rates and weeds controlled with preemergence applications of Peak in
sorghum. Also refer to the Mixing Instructions section of this label, but the addition of a spray additive is
not required for preemergence applications.
For all tank mixtures of Peak with other herbicides, refer to both labels for weeds controlled and application
information; and follow all restrictions and precautions on both labels. For example, if applying Peak in tank
mixture with AAtrex or other brands of atrazine, all the restrictions and rate limitations on the AAtrex
(atrazine) label must be followed if more restrictive/protective than those on this label.
Note: For effective preemergence activity, enough rainfall or irrigation is needed to wet the soil approxi-
mately 2 inches deep before weed emergence.
If for some reason a second application is desired, the maximum amount of Peak which can be applied is
1 oz./A during the cropping season. A second application may reduce rotational crop options; refer to the
Rotational Crops section of this label.
PRECAUTIONS ā? For all applications of Peak to sorghum
Follow these precautions to reduce chances of crop injury and/or to avoid reduced weed control:
1. Peak should not be applied to sorghum which is under severe stress due to drought, cold weather, hail,
wind damage, sand abrasion, flooding, water-logged soil, compacted soil, disease, insect damage, nutri-
ent deficiency (especially low nitrogen or iron levels), or other causes. Also, Peak should not be applied
if weeds are under severe stress due to drought or if weeds are taller than the optimum heights listed in
Table 1.
2. Do not apply Peak preemergence to early planted sorghum if cool, wet environmental conditions that
stress sorghum are expected within 2 weeks after application. Cool, wet weather following Peak applica-
tions to sorghum may result in injury to the sorghum; this injury is normally temporary and yields are not
affected.
3. If an organophosphate insecticide is applied to sorghum at planting time, do not use Peak preemergence.
Do not make a foliar or soil application of any organophosphate insecticide within 15 days before or 10
days after an application of Peak.
4. Application of Peak, either preemergence or postemergence, to sorghum growing under stress caused
by minor element nutrient deficiency (e.g., iron) or on highly calcareous soil (above pH 8.2), may result
in crop injury. Applications of Peak to fields where iron chlorosis can occur in sorghum may result in
enhanced iron chlorosis symptoms. Such enhanced iron chlorosis symptoms are generally of short dura-
tion and yields are not impacted; however, if such symptoms persist, they can be corrected by applica-
tion of foliar iron fertilizer.
5. Peak can be applied to all grain sorghum hybrids, except those susceptible to iron chlorosis, which are
being grown in areas where insufficient iron is available in the soil. Most inbred lines of sorghum have not
been tested for sensitivity to Peak. Therefore, inbred lines must be thoroughly tested for sensitivity to Peak
before treating large acreages.
6. Do not sprinkler irrigate within 4 hours after postemergence application of Peak. Rainfall or sprinkler irri-
gation occurring less than 4 hours after postemergence application may reduce weed control.
7. Do not apply Peak to sorghum that exhibits injury symptoms from a previous herbicide application or
other causes.
8. Do not use Peak on sweet sorghum.
9. Observe all precautions and limitations on the label of each product used in tank mixtures with Peak.
PeakĀ®
Table 2: Peak Tank Mixtures for Postemergence Weed Control in Grain Sorghum. Use the Tank Mix
Rate (0.5 oz./A) or Standard Rate (0.75 oz./A) for Peak and add one of the mixing partners
recommended below.
Weed and Recommended Recommended Sorghum Height
Additive 1
Size (inches) Tank Mix Partner and Rate Range (inches)
AAtrex (atrazine)2
Cocklebur (2-12) 5-12, or
COC
3/4-1 qt./A 4L
Kochia (1-6 or areas 8-12 directed
with ALS resistance)
Banvel 5-10, or
Lambsquarters (1-6 or NIS
1
/4-1/2 pt./A 8-15 directed
heavy infestations)
Morningglories (1-5) 5-12, or
Buctril
NIS
1
Nightshades (1-5) 8-24 directed
/2-1 pt./A
Pigweeds/Carelessweed,
Buctril + atrazine 2 5-12, or
Palmer Amaranth, NIS
1-2 pts./A 8-12 directed
and Waterhemps
(1-4 or ALS-resistant) Marksman 2 5-8, or
NIS
Velvetleaf (1-10) 8-12 directed
1-2 pts./A
2,4-D 5-8, or
NIS
1
/4-1/2 pt./A 4EC 8-24 directed
Canada Thistle (1-6)3 Banvel 5-10, or
NIS
Other Thistles (1-6)3 1/4-1/2 pt./A 8-15 directed
Field Bindweed (2-8)3
2,4-D 5-8, or
Hemp Dogbane (3-15)3 NIS
1/4-1/2 pt./A 4EC 8-24 directed
1 NIS= Nonionic Surfactant or COC = Crop Oil Concentrate; nitrogen may also be included where COC is
recommended; refer to the Mixing Instructions section of this label.
2 Do not use AAtrex (atrazine) on sand or loamy sand soils. Mixtures with AAtrex (atrazine) or premixes
containing atrazine may result in some reduction in control (antagonism) on cocklebur, sunflower, and
velvetleaf.
3 Indicates
āPartial Controlā? which means significant activity but not always at a level generally considered
acceptable for commercial weed control.
Table 3: Weeds Controlled (C) or Partially Controlled/Suppressed (P) With Peak Applied
Preemergence on Sorghum
Rate of Peak
Weed 0.75 oz./A 1.0 oz./A
Amaranth, Palmer (Amaranthus palmeri)* C C
Buffalobur (Solanum rostratum) C C
Buttercup, Hairy (Ranunculus sardous) C C
Carpetweed (Mollugo verticillata) C C
Cocklebur, Common (Xanthium strumarium)* P P
Copperleaf, Hophornbeam (Acalypha ostryifolia) C C
Devilās Claw (Proboscidea louisianica) C C
Kochia (Kochia scoparia)* C C
Lambsquarters, Common (Chenopodium album) C C
Morningglory, Ivyleaf (Ipomoea hederacea) P P
Morningglory, Pitted (Ipomoea lacunosa) P P
Morningglory, Tall (Ipomoea purpurea) P P
Morningglory, Smallflower (Jacquemontia tamnifolia) P C
Mustard, Wild (Brassica kaber) C C
Pigweed, Smooth (Amaranthus hybridus)* C C
Pigweed, Redroot/Carelessweed (A. retroflexus)* C C
Puncturevine (Tribulus terrestris) C C
Purslane, Common (Portulaca oleracea) C C
Purslane, Horse (Trianthema portulacastrum) C C
Radish, Wild (Raphanus raphanistrum) C C
Ragweed, Common (Ambrosia artemisiifolia) C C
Ragweed, Giant (Ambrosia trifida) P C
Sesbania, Hemp (Sesbania exaltata) P P
Sicklepod (Cassia obtusifolia) P C
continuedā?
PeakĀ®
Table 3: Weeds Controlled (C) or Partially Controlled/Suppressed (P) With Peak Applied
Preemergence on Sorghum (continued)
Rate of Peak
Weed 0.75 oz./A 1.0 oz./A
Sida, Prickly (Sida spinosa) C C
Smartweed, Pennsylvania (Polygonum pensylvanicum) C C
Sunflower, Common (Helianthus annuus) C C
Velvetleaf (Abutilon theophrasti) P P
Waterhemp, Common (Amaranthus rudis)* C C
Waterhemp, Tall (Amaranthus tuberculatus)* C C
*Certain biotypes of this weed species are known to be resistant to this and other ALS herbicides. Where
ALS-resistant biotypes are known to exist, an appropriate registered herbicide, active against that weed
and with another mode of action, should be used alone or in tank mixture with Peak to control those
biotypes.
Pigweed, Amaranth, and Waterhemp Control Program for Grain Sorghum: Since various pigweed
related species, including redroot pigweed, Palmer amaranth, common waterhemp, tall waterhemp, and
others, are prolific seed producers, have long germination periods, have ALS-resistant biotypes, and have
become problem weeds in certain areas, the following 3-step program for control of heavy infestations of
these weeds is recommended: (1) Apply Bicep II Ā®, Bicep Lite II MAGNUM, Bicep Lite II, Dual II, or Dual
II MAGNUM preemergence at the recommended rate for that soil, over Concep-treated sorghum seed. If
weeds have emerged prior to the application of the preemergence herbicide, control those weeds with tillage
or a burndown herbicide. (2) Apply a postemergence tank mixture of Peak + AAtrex (atrazine), or Banvel, or
Marksman when the pigweed, amaranth, or waterhemp plants are 1-8 inches tall (not taller). Refer to Table
2 for additional information regarding timings, rates, and additives for these tank mixtures. (3) If needed, cul-
tivate 1-3 weeks after the postemergence application. In addition to controlling pigweeds, waterhemps, and
related species, this program is also effective in controlling most other weeds common in grain sorghum.
SMALL GRAIN CEREALS (WHEAT, BARLEY, RYE, OATS, AND TRITICALE)
AND PROSO MILLET
Peak controls many broadleaf weeds in small grain cereals, including winter wheat, spring wheat, winter
barley, spring barley, rye, oats, and triticale; as well as proso millet.
Note: This product should not be used where small grains are underseeded with legumes, or the
legumes may be severely injured or killed.
Table 4: Weeds Controlled by Peak Applied Postemergence in Small Grain Cereals and Proso Millet
Cereal and Proso Millet Rates
0.38 oz./A 0.5 oz./A
Weed Size Ranges for
Weeds Controlled Optimum Control (inches)
Amaranth, Palmer (Amaranthus palmeri)** 1-3* 1-3*
Bindweed, Field (Convolvulus arvensis) 2-3* 2-4*
Bindweed, Hedge (Calystegia sepium) 1-3* 1-3*
Buckwheat, Wild (Polygonum convolvulus)*** 2-3* 2-3
Buffalobur (Solanum rostratum) 1-3 1-4
Buttercup, Hairy (Ranunculus sardous) 1-4 1-6
Chamomile, Mayweed (Anthemis cotula) 1-3 1-3
Chervil, Bur (Anthriscus scandicina) 1-2 1-3
Chickweed, Common (Stellaria media)** 1-3* 1-3*
Chickweed, Mouseear (Cerastium vulgatum) 1-3* 1-3*
Cocklebur, Common (Xanthium strumarium) ** 2-4 2-6
Eveningprimrose, Cutleaf (Oenothera laciniata) 1-3 1-4
Fiddleneck, Coast (Amsinckia intermedia) 1-3 1-3
Flixweed (Descurainia sophia) 1-4 1-6
Garlic, Wild (Allium vineale) 1-6**** 1-8****
Gromwell, Corn (Lithospermum arvense) 1-2* 1-3*
Henbit (Lamium amplexicaule) 1-2* 1-2*
continuedā?
PeakĀ®
Table 4: Weeds Controlled by Peak Applied Postemergence in Small Grain Cereals and Proso Millet
(continued)
Cereal and Proso Millet Rates
0.38 oz./A 0.5 oz./A
Weed Size Ranges for
Weeds Controlled Optimum Control (inches)
Knotweed, Prostrate (Polygonum aviculare) 1-2* 1-3*
Kochia (Kochia scoparia)** 1-3* 1-3*
Lambsquarters, Common (Chenopodium album) 1-3* 1-3*
Lettuce, Minerās (Montia perfoliata) 1-4 1-6
Lettuce, Prickly (Lactuca serriola)** 1-3 1-4
Mallow, Common (Malva neglecta) 1-2* 1-3*
Mallow, Venice (Hibiscus trionum) 1-2 1-3
Mustard, Blue (Chorispora tenella) 1-4 1-6
Mustard, Tumble (Sisymbrium altissimum) 1-4 1-6
Mustard, Wild (Brassica kaber) 1-5 1-6
Pennycress, Field (Thlapsi arvense) 1-4 1-6
Pigweed, Redroot (Amaranthus retroflexus)** 1-3* 1-3
Pigweed, Smooth (Amaranthus hybridus)** 1-3* 1-3
Pigweed, Tumble (Amaranthus albus) 1-2 1-3
Pineappleweed (Matricaria matricariodes) 1-4 1-6
Radish, Wild (Raphanus raphanistrum) 1-3 1-4
Ragweed, Common (Ambrosia artemisiifolia) 2-5 2-6
Shepherdspurse (Capsella bursa-pastoris) 1-2 1-3
Sunflower, Common (Helianthus annuus) 1-4 1-6
Tansymustard (Descurainia pinnata) 1-4 1-6
Thistle, Canada (Cirsium arvense) 1-2* 1-2*
Thistle, Russian (Salsola iberica)** 1-2* 1-2
Wallflower, Bushy (Erysimum repandum) 1-3 1-4
*Indicates āPartial Controlā? which means significant activity but not always at a level generally considered
acceptable for commercial weed control.
**Certain biotypes of this weed species are known to be resistant to this and other ALS herbicides. Where
these ALS-resistant biotypes are known to exist, an appropriate registered herbicide, active against that
weed and with another mode of action, should be used alone or in tank mixture with Peak to control
those biotypes.
***Spray after true leaves have emerged; earlier applications may result in unacceptable control.
****Wild Garlic is controlled at 0.25-0.5 oz./A. Use the 0.5 oz./A rate when added soil residual control is
desired or control of other weeds listed in this table is desired.
Postemergence Application Alone
Postemergence application should be made to small grain cereals and proso millet at the rate and timings
recommended in Table 4. If weeds are larger than the optimum size range recommended, only partial
control may be obtained.
Peak may be applied postemergence over-the-top to actively growing small grain crops or proso millet from
the 3-leaf stage of the crop to before the second node is detectable in stem elongation (Feekes Growth
Stage 7). Within that broad window of application, it is more important to time applications to the optimum
weed heights listed in Table 4, rather than crop stage. Applications made to small grain cereals or proso
millet before the 3-leaf stage increase the likelihood of crop injury. In drier climates, crop oil concentrate
(COC) is the preferred additive, instead of nonionic surfactant, when applying Peak alone with water as the
carrier. Refer to the Mixing Instructions section.
Note: Refer to the Rotational Crops section for additional restrictions.
Postemergence Tank Mixtures
Peak may be applied in various tank mixtures for weed control in small grain cereals and proso millet (refer
to partner label): (a) to include a different mode of action herbicide to help prevent or manage resistant weed
biotypes; (b) for improved control of weeds not fully controlled by Peak alone; (c) to control weeds which are
larger than the optimum size range in Table 4; or (d) to control grass weeds.
PeakĀ®
Refer to Table 5 for recommended broadleaf tank mixture partners, rates, weeds controlled, weed sizes, and
additives. The tank mixtures in Table 5 will control the broadleaf weeds listed in that table when treated at
the growth stage recommended, plus the weeds and weed sizes listed in Table 4. Apply Peak in tank mix-
tures at the 0.25-0.5 oz./A tank mix rate (refer to Table 5) and refer to the Mixing Instructions section of
this label. When tank mixing with the 0.25 oz./A Peak rate, refer to the weed sizes given for the 0.38 oz./A
used alone.
Peak may also be applied at 0.25-0.5 oz./A in tank mixtures with cereal herbicides which control grasses;
including Assert Ā®, Avenge Ā®, Dakota Ā®, Hoelon Ā®, or Tiller Ā®.
For all tank mixtures of Peak with other herbicides, refer to both labels for weeds controlled, additives rec-
ommended, and application information; and follow all restrictions and precautions on both labels.
If a second application is desired, the maximum amount of Peak which can be applied is 1 oz./A during the
cropping season.
PRECAUTIONS ā? For all applications of Peak to small grain cereals and proso millet
Follow these precautions to reduce chances of crop injury and/or to avoid reduced weed control:
1. Peak should not be applied to small grain or proso millet crops which are under severe stress due to
drought, cold weather, hail, wind damage, sand cutting, flooding, water-logged soil, compacted soil, dis-
ease, insect damage, nutrient deficiency, or other causes. Also, Peak should not be applied if weeds are
under severe stress due to drought or if weeds are taller than the optimum heights listed in Table 4.
2. Do not apply Peak to small grain cereals or proso millet if cold, wet environmental conditions that stress
wheat are expected within 1 week after application. Cold, wet weather following Peak applications to
small grains may result in injury to the cereal crop; this injury is normally temporary and yields are not
affected.
3. Do not make a foliar or soil application of any organophosphate insecticide within 15 days before or 10
days after an application of Peak.
4. Do not sprinkler irrigate within 4 hours after application of Peak. Rainfall or sprinkler irrigation occurring
less than 4 hours after application may reduce weed control.
5. Do not apply Peak to small grains that exhibit injury symptoms from a previous herbicide application or
other causes.
6. Observe all precautions and limitations on the label of each product used in tank mixtures with Peak.
7. Peak can be applied on proso millet crops. Do not apply Peak to pearl millet or other forage millets or
crop injury may occur.
Table 5: Peak Tank Mixtures for Postemergence Control of Broadleaf Weeds in Small Grain Cereals.
Use the Cereal or Lower Tank Mix Rate for Peak (0.25-0.5 oz./A) and add one of the mixing
partners listed below. Follow all stage of application restrictions on the mixing partner label.
Weed and Recommended Recommended
Size (inches)1 Additive3
Mix Partner Mix Partner Rate
Kochia (1-6) Banvel 2-4 oz./A NIS
Lambsquarters (1-6 or
Banvel SGF 4-8 oz./A NIS
heavy infestations)
3/4-11/2
Morningglories (1-5) Bronate pts./A NIS
Pigweeds (1-8) 3/4-11/2
Buctril pts./A NIS
Russian Thistle (1-4)
Wild Buckwheat (2-4) MCPA4 8-12 oz./A 4EC NIS
2,4-D 8-12 oz./A 4EC NIS
Banvel 2-3 oz./A + 2,4-D NIS
8 oz./A
1/3- 2/3
Sencor DF lb./A NIS
(not for wild
buckwheat)
1/2-1
Sencor 4 pt./A NIS
(not for wild
buckwheat)
Canada Thistle (1-6) 2 Banvel 2-4 oz./A NIS
Other Thistles (1-6) 2
Banvel SGF 4-8 oz./A NIS
Field Bindweed (2-8) 2
2,4-D 8-12 oz./A 4EC NIS
Banvel 2-3 oz./A + 2,4-D NIS
8 oz./A
1 Recommended weed sizes for optimum control.
2 IndicatesāPartial Controlā? which means significant activity, but not always at a level generally considered
acceptable for commercial weed control.
3 NIS = Nonionic Surfactant; refer to the Mixing Instructions section of this label.
4 MCPA usually does not control kochia.
PeakĀ®
CROP FAILURE
If a crop treated with Peak is lost due to a natural catastrophe such as hail or frost; an IR or IMR field corn
hybrid or a small grain cereal crop (wheat, barley, rye, oats, or triticale) may be replanted immediately.
Normal field corn or grain sorghum may be replanted, but not until one month or more after application.
For control of weeds in a replanted crop, Peak may be applied a second time only if the total Peak applied
during the cropping season does not exceed 1 oz./A.
ROTATIONAL CROPS FOLLOWING APPLICATIONS OF PEAK
Peak herbicide is broken down in the soil primarily by chemical hydrolysis and microbial degradation.
Several factors influence degradation of Peak herbicide, including soil pH, moisture, temperature, and soil
friability. In general the higher the soil pH, the less Peak is degradated due to chemical hydrolysis with little
hydrolysis occurring when soil pH levels are above 7.8. Soil pH may vary dramatically across a field and so
average samples from a field may not be representative of every area of the field. Several soil samples for
pH should be taken from across a field and analyzed individually to better define areas of differing
pH within the field. Soil moisture levels near field capacity and higher temperatures will promote microbial
activity and Peak degradation. Microbial activity will be greatest in well aerated soils and will be reduced in
areas subjected to flooding or compaction. The following tables indicate minimum intervals and restrictions
for planting rotational crops after application of Peak herbicide. These tables were developed based on aver-
age weather and normal growing conditions. If, after Peak application, periods of drought, flood, or a short-
ened growing season occur, Peak levels remaining in the soil at time of replanting may be higher than
expected. For a given geographical area and rotational crop, planting before the minimum interval or exceed-
ing the restrictions regarding maximum rate, maximum soil pH, or latest application date may result in injury
to the rotational crop and/or illegal residues. For rotational crop restrictions when Peak is used in tank mix-
tures, refer to the rotational crop intervals in the following tables for Peak and to the respective product label
of any mixing partner for additional restrictions, and use the longest interval.
If due to environmental conditions, uncertainty exists as to the safety of replanting a rotational crop, a field
grown bioassay is the best indicator of the safety of planting a given crop. Wait to plant the rotational crop
until optimum conditions exist for rapid plant establishment. Do not plant into a cold, wet, and/or compacted
seedbed.
RRV
WA ND
MT
E A MN
SD WI
OR
ID WY MI NY
IA
NB
I-80
PA
OH
IN
IL
B
NV UT CO
WV
KS I-70
KY
MO
C VA
CA OK AR NC
TN
I-40
AZ
D SC
NM MS AL
GA
TX LA
FL
PeakĀ®
Region A (North of I-80, except OR, WA, ID, and the Red River Valley area of MN and ND on soils with
pH <7.8)
RRV
ND
MT
A MN
SD WI
WY MI NY
IA
NB
I-80
IL
Restrictions
Do Not Apply
Minimum Plant Back More Than
Interval where (Maximum Rate Make
Rotational Crop Soil pH is Below 7.8 in oz./A) Application Before
Wheat, Barley, Rye, Oats, None 0.75 See use
Triticale, and IR or IMR recommendations
Field Corn
Normal Field Corn, Sorghums, 1 month 0.75 See use
Proso Millet recommendations
Popcorn, Sweet Corn, Rice, 10 months 0.5 July 10
Peas, Forage Grasses,
Green Beans
Garbanzos, Tobacco, Cabbage, 22 months 0.5 July 1
Canola, Flax, Clovers, Alfalfa,
Potatoes, Sunflowers, Soybeans,
Sugar Beets, Lentils, Leeks,
Dry Beans, and Onions,
All other crops
These recropping guidelines are applicable only on soils with pH below 7.8 and where Peak has been
applied at or below the rates specified in the above table. Do not replant any broadleaf crop if less than 10
inches of precipitation or irrigation has occurred since the application of Peak.
For situations not covered adequately in the above table, i.e., higher soil pH but lower initial Peak use rate,
conduct a soil bioassay to determine if Peak levels in the soil will allow successful establishment of the
rotational crop. Take soil samples to a depth of 6 inches (preferably in a solid core) from several locations
within the field as well as an untreated area. Plant the intended crop and allow to grow for 3 weeks. If, at the
end of 3 weeks, no difference exists between the treated and untreated soil in root and shoot growth of the
intended crop, it is safe to plant the intended crop with good growing conditions.
PeakĀ®
Red River Valley area of MN and ND, with soil pH <7.8
RRV
ND
MN
SD
Restrictions
Do Not Apply
Minimum Plant Back More Than
Interval where (Maximum Rate Make
Rotational Crop Soil pH is Below 7.8 in oz./A) Application Before
Wheat, Barley, Rye, Oats, None 0.5 See use
Triticale, and IR or IMR recommendations
Field Corn
Normal Field Corn, Sorghums, 1 month 0.38 See use
Proso Millet recommendations
Popcorn, Sweet Corn, Rice, 10 months 0.25 July 10
Green Beans, Peas,
Forage Grasses
Soybeans, Dry Beans, 22 months 0.25 July 10
Cotton, Tobacco
Cabbage, Canola, Tomatoes, Do not plant these crops for 34 months after an application of Peak.
Flax, Lentils,
All other crops
These recropping guidelines are applicable only on soils with pH below 7.8 and where Peak has been
applied at or below the rates specified in the above table. Do not replant any broadleaf crop if less than 10
inches of precipitation or irrigation has occurred since the application of Peak.
For situations not covered adequately in the above table, i.e., higher soil pH but lower initial Peak use rate,
conduct a soil bioassay to determine if Peak levels in the soil will allow successful establishment of the
rotational crop. Take soil samples to a depth of 6 inches (preferably in a solid core) from several locations
within the field as well as an untreated area. Plant the intended crop and allow to grow for 3 weeks. If, at the
end of 3 weeks, no difference exists between the treated and untreated soil in root and shoot growth of the
intended crop, it is safe to plant the intended crop with good growing conditions.
PeakĀ®
Region B (South of I-80, North of I-70 plus all of CO, UT, NV, AZ, and CA on soils with pH <7.8)
NY
IA
NB
I-80
PA
OH
IN
IL
B MO
NV UT CO
KS
I-70
CA
AZ
Restrictions
Do Not Apply
Minimum Plant Back More Than
Interval where (Maximum Rate Make
Rotational Crop Soil pH is Below 7.8 in oz./A) Application Before
Wheat, Barley, Rye, Oats, None 1 See use
Triticale, and IR or IMR recommendations
Field Corn
Normal Field Corn, Sorghums, 1 month 1 See use
Proso Millet recommendations
Popcorn, Sweet Corn, Rice, 10 months 0.5 July 10
Peas, Forage Grasses,
STS ā? Soybeans*, Green Beans
Soybeans, Dry Beans, 10 months 0.25 July 10
Tobacco
Cabbage, Canola, Flax, Clovers, 22 months 0.38 July 10
Alfalfa, Potatoes, Sunflowers,
Sugar Beets, Leeks, Onions,
All other crops
*STS soybeans which have enhanced tolerance to certain sulfonylurea herbicides.
These recropping guidelines are applicable only on soils with pH below 7.8 and where Peak has been
applied at or below the rates specified in the above table. Do not replant any broadleaf crop if less than 10
inches of precipitation or irrigation has occurred since the application of Peak.
For situations not covered adequately in the above table, i.e., higher soil pH but lower initial Peak use rate,
conduct a soil bioassay to determine if Peak levels in the soil will allow successful establishment of the
rotational crop. Take soil samples to a depth of 6 inches (preferably in a solid core) from several locations
within the field as well as an untreated area. Plant the intended crop and allow to grow for 3 weeks. If, at the
end of 3 weeks, no difference exists between the treated and untreated soil in root and shoot growth of the
intended crop, it is safe to plant the intended crop with good growing conditions.
PeakĀ®
Region C (Areas South of I-70 and North of I-40 with soil pH <7.8, excluding AZ, CA, NV, and UT)
OH
IN
IL
WV
KS I-70
KY
MO
C VA
OK AR NC
TN
I-40
Restrictions
Do Not Apply
Minimum Plant Back More Than
Interval where (Maximum Rate Make
Rotational Crop Soil pH is Below 7.8 in oz./A) Application Before
Wheat, Barley, Rye, Oats, None 1 See use
Triticale, and IR or IMR recommendations
Field Corn
Normal Field Corn, Sorghums, 1 month 1 See use
Proso Millet recommendations
Popcorn, Sweet Corn, Rice, 10 months 1 July 10
Peas, Forage Grasses
STS Soybeans*, Garbanzos, 10 months 0.75 July 10
Green Beans, Peanuts, Tobacco
Soybeans, Dry Beans, Cabbage, 10 months 0.5 July 10
Canola, Tomatoes, Flax,
Lentils, Cotton
Clovers, Alfalfa, Potatoes, 22 months 0.5 July 10
Sunflowers, Sugar Beets, Leeks,
Onions, All other crops
*STS soybeans which have enhanced tolerance to certain sulfonylurea herbicides.
These recropping guidelines are applicable only on soils with pH below 7.8 and where Peak has been
applied at or below the rates specified in the above table. Do not replant any broadleaf crop if less than 10
inches of precipitation or irrigation has occurred since the application of Peak.
For situations not covered adequately in the above table, i.e., higher soil pH but lower initial Peak use rate,
conduct a soil bioassay to determine if Peak levels in the soil will allow successful establishment of the
rotational crop. Take soil samples to a depth of 6 inches (preferably in a solid core) from several locations
within the field as well as an untreated area. Plant the intended crop and allow to grow for 3 weeks. If, at the
end of 3 weeks, no difference exists between the treated and untreated soil in root and shoot growth of the
intended crop, it is safe to plant the intended crop with good growing conditions.
PeakĀ®
Region D (All Areas South of I-40 with soil pH <7.8, except AZ and CA)
OK AR NC
TN
I-40
D SC
NM MS AL
GA
TX LA
FL
Restrictions
Do Not Apply
Minimum Plant Back More Than
Interval where (Maximum Rate Make
Rotational Crop Soil pH is Below 7.8 in oz./A) Application Before
Wheat, Barley, Rye, Oats, None 1 See use
Triticale, and IR or IMR recommendations
Field Corn
Normal Field Corn, Sorghums, 1 month 1 See use
Proso Millet recommendations
Popcorn, Sweet Corn, Rice, 10 months 1 July 10
Peas, Forage Grasses,
STS Soybeans*
Soybeans, Dry Beans, 10 months 0.75 July 10
Garbanzos, Green Beans,
Peanuts, Cotton, Tobacco
Cabbage, Canola, Tomatoes, 10 months 0.5 July 10
Flax, Lentils
Clovers, Alfalfa 15 months 0.5 July 10
(0.38 in west TX,
western OK, NM,
and AZ)
Potatoes, Sunflowers, Sugar 22 months 0.5 July 10
Beets, Leeks, Onions
All other crops 18 months 0.5 July 10
*STS soybeans which have enhanced tolerance to certain sulfonylurea herbicides.
Exception to requirement for pH <7.8 ā? In MS, LA, AR, and southern and eastern TX, including South Texas,
the Lower Rio Grande Valley, the Coastal Bend, and the Blacklands; cotton, rice, STS soybeans which have
enhanced tolerance to certain sulfonylurea herbicides, normal soybeans, dry beans, and peanuts can be
planted on all soils (at least 10 months after application) provided there are at least 10 inches of rainfall or
irrigation during the 6 months after application of Peak.
These recropping guidelines are applicable only on soils with pH below 7.8 and where Peak has been
applied at or below the rates specified in the above table. Do not replant any broadleaf crop if less than 10
inches of precipitation or irrigation has occurred since the application of Peak.
For situations not covered adequately in the above table, i.e., higher soil pH but lower initial Peak use rate,
conduct a soil bioassay to determine if Peak levels in the soil will allow successful establishment of the
rotational crop. Take soil samples to a depth of 6 inches (preferably in a solid core) from several locations
within the field as well as an untreated area. Plant the intended crop and allow to grow for 3 weeks. If, at the
end of 3 weeks, no difference exists between the treated and untreated soil in root and shoot growth of the
intended crop, it is safe to plant the intended crop with good growing conditions.
PeakĀ®
Region E (Pacific Northwest (ID, OR, WA) with soil pH <7.2)
WA
E OR
ID
Restrictions
Do Not Apply
Minimum Plant Back More Than
Interval where (Maximum Rate Make
Rotational Crop Soil pH is Below 7.2 in oz./A) Application Before
Wheat, Barley, Rye, Oats, None 0.75 See use
Triticale, and IR or IMR recommendations
Field Corn
Normal Field Corn, Sorghums, 1 month 0.75 See use
Proso Millet recommendations
Grasses Grown for Seed 4 months 0.5 June 15
Popcorn, Sweet Corn, Rice, 10 months 0.5 July 1
Peas, Forage Grasses,
STS Soybeans*
Soybeans, Dry Beans, 10 months 0.5 June 15
Garbanzos, Green Beans**,
Peanuts, Tobacco, Cabbage**,
Canola**, Tomatoes**, Flax**,
Lentils**
Clovers, Alfalfa, Potatoes 15 months 0.5 May 15
Sunflowers, Sugar Beets, 22 months 0.5 May 15
Leeks, Onions
All other crops 18 months 0.5 May 15
*STS soybeans which have enhanced tolerance to certain sulfonylurea herbicides.
**Do not rotate to green beans, cabbage, canola, tomatoes, flax, or lentils unless 6 inches of rainfall or
irrigation is received within 6 months after application of Peak and the soil is tilled to a minimum of
4 inches deep prior to seeding the rotational crop.
These recropping guidelines are applicable only on soils with pH below 7.2 and where Peak has been
applied at or below the rates specified in the above table.
For situations not covered adequately in the above table, i.e., higher soil pH but lower initial Peak use rate,
conduct a soil bioassay to determine if Peak levels in the soil will allow successful establishment of the
rotational crop. Take soil samples to a depth of 6 inches (preferably in a solid core) from several locations
within the field as well as an untreated area. Plant the intended crop and allow to grow for 3 weeks. If, at the
end of 3 weeks, no difference exists between the treated and untreated soil in root and shoot growth of the
intended crop, it is safe to plant the intended crop with good growing conditions.
PeakĀ®
STORAGE AND DISPOSAL
Pesticide Storage and Disposal
Storage
Store in a cool, dry place. Do not store this product under wet conditions.
Pesticide Disposal
Do not contaminate water, food, or feed by storage, disposal, or cleaning of equipment. Open dumping
is prohibited. Wastes resulting from the use of this product are toxic. Improper disposal of unused
pesticide, spray mixture, or rinsate is a violation of federal law. Pesticide, spray mixture, or rinsate that
cannot be used according to label instructions must be disposed of according to federal, state, or local pro-
cedures. For guidance in proper disposal methods, contact your State Pesticide or Environmental Control
Agency, or the Hazardous Waste Representative at the nearest EPA Regional Office.
Container Disposal
Do not reuse bottle. Triple rinse (or equivalent) and offer for recycling or reconditioning or puncture and dis-
pose of in a sanitary landfill, or by incineration, or by open burning, if allowed by state and local authorities.
If burned, keep out of smoke.
For minor spills, leaks, etc., follow all precautions indicated on this label and clean up immediately. Take
special care to avoid contamination of equipment and facilities during cleanup procedures and disposal of
wastes. In the event of a major spill, fire, or other emergency, call 1-800-888-8372, day or night.
PRECAUTIONARY STATEMENTS
Hazards to Humans and Domestic Animals
CAUTION
Harmful if swallowed or absorbed through skin. Causes moderate eye irritation. Avoid contact with eyes,
skin, or clothing.
Statement of Practical Treatment
If in eyes: Flush eyes with plenty of water. Get medical attention if irritation persists.
If swallowed: Call a physician or Poison Control Center. Drink 1 or 2 glasses of water and induce vomiting
by touching back of throat with finger. Do not induce vomiting or give anything by mouth to an unconscious
person.
If on skin: Wash with plenty of soap and water. Get medical attention if irritation occurs and persists.
Note to Physician: If ingested, induce emesis or lavage stomach. Treat symptomatically.
Personal Protective Equipment
Applicators and other handlers must wear:
ā? Long-sleeved shirt and long pants
ā? Waterproof gloves
ā? Shoes plus socks
Follow manufacturerās instructions for cleaning/maintaining Personal Protective Equipment (PPE). If no
such instructions for washables, use detergent and hot water. Keep and wash PPE separately from other
laundry.
Engineering Control Statements
When handlers use closed systems, enclosed cabs, or aircraft in a manner that meets the requirements
listed in the Worker Protection Standard (WPS) for agricultural pesticides [40 CFR 170.240 (d) (4-6)], the
handler PPE requirements may be reduced or modified as specified in the WPS.
User Safety Recommendations
Users should:
ā? Wash hands before eating, drinking, chewing gum, using tobacco, or using the toilet.
ā? Remove clothing immediately if pesticide gets inside. Then wash thoroughly and put on clean
clothing.
Environmental Hazards
Do not apply directly to water, to areas where surface water is present, or to intertidal areas below the mean
high water mark. Do not contaminate water when disposing of equipment wash water or rinsate.
This chemical demonstrates the properties and characteristics associated with chemicals detected in
ground water. The use of this chemical in areas where soils are permeable, particularly where the water
table is shallow, may result in ground water contamination.
PeakĀ®
AAtrex Ā®, CustomPakā?, Bicep II Ā®, Bicep Lite II Ā®, Bicep Lite II MAGNUM Ā®, ConcepĀ®, Dual II Ā®,
Dual II MAGNUM Ā®, and PeakĀ® trademarks of Novartis
Assert Ā® and AvengeĀ® trademarks of American Cyanamid Company
BanvelĀ®, Banvel SGFĀ®, and MarksmanĀ® trademarks of BASF Corporation
BronateĀ® and Buctril Ā® trademarks of Aventis
Clorox Ā® trademark of the Clorox Company
DakotaĀ®, HoelonĀ®, and TillerĀ® trademarks of AgrEvo USA Company
Sencor Ā® trademark of Bayer Corporation
STS ā? trademark of E. I. duPont de Nemours and Company, Inc.
Ā©1999 Novartis
Product of Switzerland
Formulated in the USA
Novartis Crop Protection, Inc.
Greensboro, North Carolina 27419
www.cp.us.novartis.com
NCP 763B-M9C 1199
See directions for use in enclosed booklet.
TM
AGRICULTURAL USE REQUIREMENTS
Peak Ā®
Use this product only in accordance with its
labeling and with the Worker Protection
Standard, 40 CFR part 170. Refer to supple-
HERBICIDE mental labeling under āAgricultural Use
For weed control in grain Requirementsā? in the Directions for Use sec-
sorghum (milo), wheat,
tion for information about this standard.
barley, rye, oats, triticale,
and proso millet
KEEP OUT OF REACH
Active Ingredient:
OF CHILDREN.
Prosulfuron: 1-(4-methoxy-
CAUTION
6-methyl-triazin-2-yl)-3-
[2-(3,3,3-trifluoropropyl)-
phenylsulfonyl]-urea . . . . 57.0% Precautionary Statements
43.0% Hazards to Humans and Domestic Animals
Other Ingredients:
Harmful if swallowed or absorbed through
Total: 100.0% skin. Causes moderate eye irritation. Avoid con-
Peak is a water-dispersible tact with eyes, skin, or clothing.
granule.
Statement of Practical Treatment
EPA Reg. No. 100-763 If in eyes: Flush eyes with plenty of water. Get
EPA Est. 100-LA-1
medical attention if irritation persists.
CustomPakā? and PeakĀ® If swallowed: Call a physician or Poison
trademarks of Novartis
Control Center. Drink 1 or 2 glasses of water
Ā©1999 Novartis and induce vomiting by touching back of throat
Product of Switzerland with finger. Do not induce vomiting or give
Formulated in the USA anything by mouth to an unconscious person.
Novartis Crop Protection, Inc. If on skin: Wash with plenty of soap and water.Get
Greensboro, NC 27419
medical attention if irritation occurs and persists.
www.cp.us.novartis.com
Note to Physician: If ingested, induce emesis
This product is filled by
or lavage stomach. Treat symptomatically.
weight not by volume.
Environmental Hazards
15 OUNCES See Environmental Hazards in booklet for
additional information.
NET WEIGHT
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