®
Herbicide control in field corn
For post emergence weed
(grown for grain, silage, or seed) and popcorn
Active Ingredients:
Primisulfuron-methyl: 3-[4,6-Bis(difluoromethoxy)-
pyrimidin-2-yl]-1-(2-methoxycarbonyl-phenylsulfonyl) urea . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7.5%
PULL HERE TO OPEN
Sodium salt of dicamba (3,6-dichloro-o-anisic acid*) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43.9%
Other Ingredients: 48.6%
Total: 100.0%
*This product contains 39.9% 3,6-dichloro-o-anisic acid (dicamba).
NorthStar is a water-dispersible granule.
KEEP OUT OF REACH OF CHILDREN.
CAUTION
See additional precautionary statements
and directions for use inside booklet.
EPA Reg. No. 100-923
EPA Est. 100-LA-001
SCP 923A-L1E 0301
6 lbs. 4 oz.
Net Weight
SCP 130-923A-L1E
NorthStarâ„?
FIRST AID
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. If person is
unconscious, do not give anything by mouth and do not induce vomiting.
If on skin � Wash with plenty of soap and water. Get medical attention if symptoms
persist.
If in eyes � Flush eyes with plenty of water. Call a physician if irritation persists.
Note to
If ingested, induce emesis or lavage stomach. Treat symptomatically.
Physician
HOT LINE NUMBER
For 24 Hour Medical Emergency Assistance (Human or Animal) or
Chemical Emergency Assistance (Spill, Leak, Fire, or Accident),
Call
1-800-888-8372
PRECAUTIONARY STATEMENTS
Hazards to Humans and Domestic Animals
CAUTION
Harmful if swallowed or absorbed through skin. Causes moderate eye irritation. Avoid contact with
skin, eyes, or clothing. Wash thoroughly with soap and water after handling.
Personal Protective Equipment
Applicators and other handlers must wear:
� Long-sleeved shirt and long pants
� Waterproof gloves
� Shoes plus socks
� Protective eyewear
Follow manufacturer’s instructions for cleaning/maintaining 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:
� Wash hands before eating, drinking, chewing gum, using tobacco, or using the toilet.
� Remove clothing immediately if pesticide gets inside. Then wash thoroughly and put on
clean clothing.
� Remove PPE immediately after handling this product. Wash the outside of gloves before
removing. As soon as possible, wash thoroughly and change into 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.
Ground Water Advisory
Dicamba has been identified in ground water sampling under vulnerable conditions. There is the
possibility that the dicamba in NorthStar may leach through soil to ground water, especially where
soils are coarse and ground water is near the surface. Consult with the pesticide state lead agency or
local agricultural agencies for information regarding soil permeability and aquifer vulnerability in
your area.
CONDITIONS OF SALE AND LIMITATION OF WARRANTY AND LIABILITY
NOTICE: Read the entire Directions for Use and Conditions of Sale and Limitation of Warranty
and Liability before buying or using this product. If the terms are not acceptable, return the
product at once, unopened, and the purchase price will be refunded.
NorthStarâ„?
The Directions for Use of this product should be followed carefully. It is impossible to eliminate all
risks inherently associated with use of this product. Crop injury, ineffectiveness or other unintended
consequences may result because of such factors as manner of use or application, weather or crop
conditions, presence of other materials or other influencing factors in the use of the product, which
are beyond the control of SYNGENTA CROP PROTECTION, Inc. or Seller. All such risks shall be assumed
by Buyer and User, and Buyer and User agree to hold SYNGENTA and Seller harmless for any claims
relating to such factors.
SYNGENTA warrants that this product conforms to the chemical description on the label and is rea-
sonably fit for the purposes stated in the Directions for Use, subject to the inherent risks referred to
above, when used in accordance with directions under normal use conditions. This warranty does not
extend to the use of the product contrary to label instructions, or under abnormal conditions or
under conditions not reasonably foreseeable to or beyond the control of Seller or SYNGENTA, and
Buyer and User assume the risk of any such use. SYNGENTA MAKES NO WARRANTIES OF
MERCHANTABILITY OR OF FITNESS FOR A PARTICULAR PURPOSE NOR ANY OTHER EXPRESS OR
IMPLIED WARRANTY EXCEPT AS STATED ABOVE.
In no event shall SYNGENTA or Seller be liable for any incidental, consequential or special damages
resulting from the use or handling of this product. THE EXCLUSIVE REMEDY OF THE USER OR BUYER,
AND THE EXCLUSIVE LIABILITY OF SYNGENTA AND SELLER FOR ANY AND ALL CLAIMS, LOSSES,
INJURIES OR DAMAGES (INCLUDING CLAIMS BASED ON BREACH OF WARRANTY, CONTRACT,
NEGLIGENCE, TORT, STRICT LIABILITY OR OTHERWISE) RESULTING FROM THE USE OR HANDLING OF
THIS PRODUCT, SHALL BE THE RETURN OF THE PURCHASE PRICE OF THE PRODUCT OR, AT THE
ELECTION OF SYNGENTA OR SELLER, THE REPLACEMENT OF THE PRODUCT.
SYNGENTA and Seller offer this product, and Buyer and User accept it, subject to the foregoing
Conditions of Sale and Limitations of Warranty and of Liability, which may not be modified except by
written agreement signed by a duly authorized representative of SYNGENTA.
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.
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 training, decontamination, notification, and emergency assistance. It also
contains specific instructions and exceptions pertaining to the statements on this label about
personal protective equipment (PPE) and restricted-entry interval. 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. Exception: If the product is soil-injected or soil-incorporated, the Worker Protection
Standard, under certain circumstances, allows workers to enter the treated area if there will be
no contact with anything that has been treated.
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:
� Coveralls
� Waterproof gloves
� Shoes plus socks
� Protective eyewear
FAILURE TO FOLLOW THE DIRECTIONS FOR USE AND PRECAUTIONS ON THIS LABEL MAY RESULT IN
POOR WEED CONTROL, CROP INJURY, OR ILLEGAL RESIDUES.
Observe all precautions and limitations on this label and on the labels of each product used in tank
mixtures with this product.
STORAGE AND DISPOSAL
Pesticide Storage and Disposal
Storage
Store in a cool, dry place. Do not store this product under wet conditions.
NorthStarâ„?
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 procedures. 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
Triple rinse (or equivalent) and dispose of in an incinerator or landfill approved for pesticide
containers, 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.
GENERAL INFORMATION
NorthStar is a selective herbicide applied after emergence of both crop and weeds for the control of
many broadleaf weeds, shattercane, sorghum-almum, johnsongrass, and quackgrass in field corn
(grown for grain, silage, or seed) and popcorn. Application may be made by ground equipment to
young, actively growing weeds. Refer to Tables 1-6 for lists of weeds controlled by NorthStar alone
and in tank mix combinations.
The level of weed control following a NorthStar application is dependent upon weed species, weed
size at time of application, and growing conditions. Weed control is better when ample soil moisture
exists before and after NorthStar application, than when the soil is dry and weeds are under stress
from lack of moisture.
Where reference is made to weeds partially controlled, partial control means significant activity, but
not always at a level generally considered acceptable for commercial weed control.
Growth of susceptible weeds is inhibited following an application of NorthStar. The leaves turn
yellow and/or red after several days followed by death of the growing point. In addition, broadleaf
weeds exhibit stem and leaf twisting and bending. Complete plant death occurs 7-30 days after a
NorthStar application, depending upon weed species and environmental conditions. Weeds not
completely killed by NorthStar are often stunted and are less competitive to corn. NorthStar reaching
the soil during a postemergence application provides preemergence control of certain weed species.
NorthStar, applied at labeled rates, rarely causes corn injury. When a crop response occurs, it is
generally of short duration and yields are not affected.
Cold weather stress (prolonged cold temperatures at time of or shortly after application) may
contribute to corn injury.
Use Precautions
Follow the precautions listed below to reduce chances for crop injury and/or to avoid reduced weed
control:
1. Field Corn: Apply a single postemergence NorthStar application at the standard use rate
(5 oz./A) broadcast over-the-top, directed, or semi-directed when field corn height is between 4
and 20 inches tall (V2-V6). Only directed or semi-directed applications should be made when corn
is between 20 and 36 inches tall. Do not apply to corn plants less than 4 inches tall or injury may
occur.
2. NorthStar should not be applied if corn shows severe stress or injury due to drought, cold
weather, hail, flooding, compacted soil, saturated soil conditions, disease, insect damage,
nutrient deficiency, previously applied herbicides, or other causes.
3. If irrigation is necessary following application, delay for 24 hours to minimize injury potential,
particularly on coarse-textured soils, and to maximize weed control. Rainfall occurring within 4
hours after a NorthStar application may reduce weed control.
4. If a “normal� or IT 1 corn hybrid (not an IR or IMR2 hybrid) is planted and Dyfonate ®, Lorsban ®,
Thimet ®, or other organophosphate insecticide is applied at planting or before applying
NorthStar, temporary injury may occur following the NorthStar application. Do not apply
NorthStar if this corn crop was previously treated with Counter ® 15G (any application method)
or Counter CR ® applied in-furrow at planting or over the row at cultivation, as severe crop injury
may occur. Application of NorthStar to corn previously treated with labeled rates of Counter CR
applied in a surface band or T-band (in front of press wheel) at planting time, may result in crop
injury. SYNGENTA will not be held responsible for losses or damage resulting from such use. If an
IR or IMR corn hybrid is planted, organophosphate insecticides, including terbufos (Counter), can
be applied at any time according to label directions without increasing the likelihood of injury
to those hybrids.
1IT � Corn with enhanced imidazolinone herbicide tolerance.
2IR/IMR � Corn with enhanced imidazolinone herbicide resistance.
NorthStarâ„?
5. Do not make a foliar postemergence or soil application of any organophosphate insecticide
within 10 days before or 7 days after a NorthStar application, or severe crop injury may occur.
6. NorthStar may be applied to all field corn hybrids except the few that are classified by Syngenta
as not tolerant. Consult your chemical dealer, seed supplier, or Syngenta representative for a
current listing of field corn hybrids classified as not tolerant to NorthStar.
7. Field Corn Grown for Seed and Popcorn: NorthStar can only be applied directed or semi-
directed to inbred lines of field corn and popcorn; however, all inbred lines and all popcorn
hybrids have not been tested for tolerance to NorthStar, nor does Syngenta have access to all seed
company data. Therefore, inbred lines of field corn and popcorn hybrids must be thoroughly test-
ed for tolerance to NorthStar in small areas before treating large acreages. To avoid crop injury,
popcorn and inbred lines should not be sprayed with over-the-top applications of NorthStar. Use
only semi-directed or directed applications with drop nozzles when the popcorn or inbred lines
are between 10 and 36 inches tall, or 15 days before tassel emergence, whichever comes first.
8. Do not use NorthStar on sweet corn or ornamental (Indian) corn.
9. Aphids or other insects infesting johnsongrass may move to the corn following NorthStar
applications for johnsongrass control. The insects may transmit viral diseases to the corn resulting
in corn stunting, leaf discoloration, and yield loss. To reduce the likelihood of disease
development, plant virus-resistant corn hybrids and/or control the insects.
10. Best weed control results will be achieved by spraying NorthStar to weeds within the height
ranges listed in Tables 1-6 and by following application recommendations.
11. The potential for corn stunting from decaying johnsongrass rhizomes may be reduced through
tillage prior to planting corn.
12. Do not apply NorthStar in tank mixtures with Poast ® or Poast Plus ® herbicides, as grass control
is often reduced significantly and/or crop injury may occur.
13. Observe all precautions and limitations on the label of each tank mix partner used with NorthStar
that is named on this label.
Crop Failure
If corn treated with NorthStar is lost due to a catastrophe (for example, hailstorm), corn hybrids with
tolerance to NorthStar may be replanted 14 days or more after application, unless dry weather has
persisted. An IR or IMR corn hybrid may be replanted immediately. Do not make a second application
of NorthStar. If any other products were applied prior to or after NorthStar, read product labels and
follow the most restrictive recrop limitations.
Rotational Crops
The following crops may be rotated at the intervals indicated following an application of NorthStar
to corn.
Rotational Crop Interval Notes
IR or IMR Field corn hybrids None Refer to Crop Failure section.
Field corn 14 days Refer to Crop Failure section.
Winter wheat, 3 months Injury may occur if dry weather prevails
winter barley, rye during much of the time between
NorthStar application and seeding of
winter cereals.
Alfalfa, sweet corn, popcorn, 8 months Injury may occur to sorghum, alfalfa, or
cotton, dry beans, green beans, sunflowers if dry weather prevails during
peanuts, peas, potatoes, sorghum, much of the time between NorthStar
soybeans, sunflowers, spring-seeded application and seeding of these crops.
small grains, tobacco
All other crops 18 months --
Notes: (1) For rotational crop restrictions when NorthStar is used in tank mixtures, refer to the
rotations above for NorthStar and to the respective product labels of any mixing partner for
additional restrictions. (2) Do not use in the Red River Valley areas of Minnesota or North Dakota or
in areas with similar soils, unless corn will be the only crop grown in the following two seasons.
APPLICATION PROCEDURES
Ground Spray Equipment: Use stainless steel, aluminum, fiberglass, or polyethylene spray tanks. Spray
nozzles should be uniformly spaced and of the same size, and should provide accurate and uniform
application. Use spray nozzles that provide medium-coarse droplets to provide good coverage and to
minimize drift. (See Recommendations to Avoid Spray Drift section which follows.)
NorthStarâ„?
To help assure accuracy, calibrate sprayer at the beginning of the season before use and recalibrate
frequently. Also recalibrate any time carriers are changed. For ground application, use a minimum of
10 gals. of water per acre. Higher volumes (e.g., 20 gals./A) should be used under severe weed
infestations to ensure adequate spray coverage. Always include crop oil concentrate or nonionic
surfactant in the spray mixture (see Mixing Procedures 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 low pressure nozzles. A centrifugal pump which provides propeller shear action for dispers-
ing and mixing the product is recommended. The pump should provide a minimum of 20
gals./minute/100 gal. tank size circulated through correctly positioned sparger tubes or jets. Agitation
during both mixing and application is essential. Use screens to protect the pump and to prevent
nozzles from clogging. Screens placed on the suction side of the pump should be 16-mesh or coarser.
Do not place a screen in the recirculation line. Use 50-mesh or coarser screens between the pump and
boom, and when required, at the nozzles. Check nozzle manufacturer’s recommendations.
Good coverage of weeds with the spray mixture is essential for maximum weed control results.
Observe sprayer nozzles frequently during the spraying operation to ensure that the spray pattern is
uniform. Avoid any spray application under conditions when uniform coverage cannot be obtained
or when excessive spray drift may occur. To reduce spray drift, do not apply when winds are in excess
of 10 mph. Allow adequate distance between target area and desirable, nontarget vegetation. Avoid
spray overlap, because crop injury may result. Use a nozzle spacing and boom height arrangement
that avoids applying an excessive rate of NorthStar directly over the corn rows. Boom height for
broadcast over-the-top application should be based upon the height of the corn, and should be in
accordance with the nozzle manufacturer’s recommendations for height above the target area.
Do not apply NorthStar as a band application directly over the corn rows. NorthStar may be applied
postemergence over-the-top, directed, or semi-directed when field corn height is between 4 and 20
inches tall (V2-V6). If the corn canopy would prevent adequate coverage of weeds, apply NorthStar
directed or semi-directed with drop nozzles even if the corn height is less than 20 inches. NorthStar
may only be applied directed or semi-directed when field corn is between 20 and 36 inches tall (10
and 36 inches tall for inbred lines of field corn and popcorn) or 15 days before tassel emergence,
whichever comes first. Avoid all direct or indirect contact (such as spray drift) of NorthStar with crops
other than those recommended for treatment on this label, since injury may occur.
Sensitive Crop Precautions
NorthStar herbicide may cause injury to desirable trees and plants, particularly beans, cotton, flowers,
fruit trees, grapes, ornamentals, peas, potatoes, soybeans, sunflowers, tobacco, tomatoes, and other
broadleaf plants when contacting their roots, stems, or foliage. These plants are most sensitive to
NorthStar herbicide during their development or vegetative growing stage. FOLLOW THE
PRECAUTIONS LISTED BELOW WHEN USING NORTHSTAR HERBICIDE.
� Do not apply NorthStar when soybeans are growing nearby if any of these conditions exist: (1) corn
is more than 24 inches tall, (2) soybeans are more than 10 inches tall, and (3) soybeans have begun
to bloom.
� Do not treat areas where possible downward movement into the soil or surface washing may cause
contact of NorthStar herbicide with the roots of desirable plants such as trees and shrubs.
� Avoid making applications when spray particles may be carried by air currents to areas where
sensitive crops and plants are growing, or when temperature inversions exist. Do not spray near
sensitive plants if wind is gusty or in excess of 5 mph and moving in the direction of adjacent
sensitive crops. Coarse sprays are less likely to drift out of the target area than fine sprays.
� Also refer to the following sections of the label: Recommendations to Avoid Spray Drift and
Cleaning Equipment After NorthStar Application.
Chemigation: Do not apply this product through any type of irrigation system.
Aerial Application: Apply NorthStar in a minimum spray volume of 5 gals./A. Avoid application under
conditions where uniform coverage cannot be obtained or where excessive spray drift may occur.
Select nozzles and boom configurations that produce medium-coarse droplets (250-400 microns
VMD). Make applications at a maximum spray height of 10 ft. above the crop with low-drift nozzles
at a maximum pressure of 40 psi. Boom length should be a maximum of 70% of the wingspan of the
aircraft when fixed-wing aircraft are used. Orient nozzles down and slightly backward. Use swath
adjustment to manage wind displacement of the spray. Avoid spraying when wind speed exceeds 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.
Restrictions
1. Do not make more than 1 application per year.
2. Do not use crop oil concentrate (COC) when making aerial applications of NorthStar.
3. Do not make NorthStar applications before corn is at least 4 inches tall.
4. Do not make aerial applications of NorthStar to field corn grown for seed or popcorn.
5. Do not apply NorthStar by aerial application in New York State.
NorthStarâ„?
Recommendations to Avoid Spray Drift
As with all crop protection products, it is important to avoid off-target movement.
Do not allow spray from ground equipment 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:
� Do not spray if wind speed is in excess of 10 mph or if winds are gusty.
� If sensitive crops or plants are growing downwind, extreme caution must be used under all
conditions. (See Sensitive Crop Precautions section.) Do not spray if winds are gusty or above 5 mph.
� Use extreme caution when conditions are favorable for drift (high temperatures and low relative
humidity), especially when sensitive plants are located nearby.
� Drift from applications of the herbicide is likely to result in damage to sensitive plants adjacent to
the treatment site. This damage can occur at levels below the concentrations that can be detected
with chemical analysis.
� Do not apply when a temperature inversion exists. If an inversion condition is suspected, consult
with local weather services before making an application.
� Further reductions in drift can be obtained by:
1. Using nozzles that provide a uniform droplet size. Use nozzles that produce medium to coarse
droplets (250-400 microns VMD) that are less prone to result in spray drift.
2. Use flat fan nozzles. For example, Turbo Teejet, XR ® Teejet, RF Raindrop ®, or similar “low
pressure� nozzles are preferred.
3. Recalibrate sprayer by reducing spray pressures and by increasing spray volumes to produce larger
droplets when conditions favor drift.
4. Applying as close to target weeds as practical to obtain a good spray pattern for adequate
coverage according to nozzle manufacturer’s recommendations.
MIXING PROCEDURES
IMPORTANT: Follow the correct mixing order on the label or the material may not mix properly.
Poor mixing may result in crop injury or poor product performance.
1. Make sure the spray tank is clean before mixing. If it is contaminated with other materials, mixing
problems and/or clogging may occur, or injury to the crop may result.
2. Fill the spray tank 1/4- 1/2 full with clean water and begin agitation.
3. Make certain that the agitation system is working properly and creates a rippling or rolling action
on the liquid surface. Maintain agitation throughout the mixing and spraying process.
4. Add any products packaged in water-soluble film to the tank first. Allow the packets to
completely dissolve and the contents of the packets to fully disperse into the mix water.
Important: Water-soluble packets must always be the first material put into the spray tank after
water. For products packaged in water-soluble packaging, do not tank mix with products
containing boron or mix in equipment previously used to apply a product mixture containing
boron unless the tank and spray equipment has been thoroughly cleaned. (See Cleaning
Equipment After NorthStar Application.)
5. Pour the required amount of NorthStar into the spray tank while continuing agitation and
allowing time to fully disperse.
6. While maintaining agitation, continue filling the spray tank. When the tank is 3/4 full, add any
tank mix partners. Add any water-dispersible granule or other dry formulations first, and allow
material to disperse. Then add any emulsifiable liquid formulation.
7. Follow by adding either (a) a nonionic surfactant with a minimum of 80% of the constituents
effective as a spray adjuvant (e.g., X-77®), at the rate of 1 qt./100 gals. of spray volume (0.25%
volume/volume) or (b) a petroleum- or vegetable-based crop oil concentrate containing not less
than 12% emulsifier at 1-4 pts./A as specified on the crop oil concentrate label. Crop oil concen-
trate should not be used if corn is greater than 12 inches tall. Use only nonionic surfactant with
or without liquid nitrogen fertilizer or ammonium sulfate as described below. The concentration
of the crop oil concentrate should not exceed 2.5% volume/volume. In addition to crop oil
concentrate or nonionic surfactant, liquid nitrogen fertilizer (28-34% nitrogen-ammonium form)
may also be added at 2-4 qts./A. Instead of the liquid nitrogen fertilizer, spray grade ammonium
sulfate may be used at the rate of 2-4 lbs./A. Liquid nitrogen fertilizers or ammonium sulfate
should not be used as a substitute for crop oil concentrate or nonionic surfactant in the spray
mixture. Do not use liquid fertilizer as the spray carrier.
NorthStarâ„?
8. If AAtrex ® (atrazine), Accent ®, Banvel ®, Clarity ®, Marksman®, Tough®, or Resource® is desired
as a tank mix partner, add it next while continuing to agitate. When NorthStar is used alone or in
tank mix combinations, either crop oil concentrate or a nonionic surfactant should be included,
with or without liquid nitrogen fertilizer or ammonium sulfate, as described in item 7 above. Do
not use crop oil concentrate as the spray adjuvant when using tank mixtures with Banvel, Clarity,
or Marksman. Use a nonionic surfactant with or without liquid nitrogen fertilizer or ammonium
sulfate as the additive in tank mixtures containing those products.
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 needed.
11. Do not leave spray in the spray tank without continuous agitation. Always maintain agitation to
avoid separation and buildup of undesirable residues on the walls of the spray tank.
12. Although NorthStar will remain active in the spray solution for at least 48 hours, make only
sufficient mixture that will be sprayed the day in which it will be mixed.
Cleaning Equipment After NorthStar Application
Because most crops other than corn are extremely sensitive to low rates of NorthStar, special
attention must be given to cleaning equipment before spraying a crop other than corn. 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 cleaning solution of 1 gal. of household ammonia per 25 gals. of water. Many
commercial spray tank cleaners may be used. Please request and read a copy of the Syngenta
brochure “Clean It Up! A Guide to Cleaning Your Sprayers from Syngenta� (SCP 175-00103-A 4/99)
from your local Syngenta representative for more information about proper tank cleaning proce-
dures. Do not use chlorine-based cleaners such as Clorox®.
3. Use a pressure washer to clean the inside of the spray tank with this solution. Take care to wash
all parts of the tank, including the inside top surface. If pressure washer is not available, com-
pletely fill the sprayer with the cleaning solution to ensure contact of the cleaning 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.
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
untreated corn or return to a rinsate tank for later use as make-up for spraying corn or use other
approved disposal.
6. Repeat steps 2-5.
7. Remove nozzles, screens, and strainers and clean separately in the ammonia 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 360 tank washing
Ëš
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 recirculate the cleaning solution for at least 15 minutes. Flush the spray boom with
the cleaning solution. Repeat the rinsing procedure 1-2 times.
CROP USE DIRECTIONS
NorthStar Applied Alone For Weed Control In Corn
Prior to all NorthStar applications, a preemergence herbicide such as Dual II®, Dual II MAGNUM®,
Bicep II®, Bicep II MAGNUM®, Bicep Lite II®, Bicep Lite II MAGNUM®, or Dual II + AAtrex should be
applied for grass control, and will improve control of several of the weeds listed in Tables 1-6. Consult
their respective labels for directions, precautions, and limitations before applying.
Weed competition with corn plants can severely affect corn yields. For best weed control and to
realize the full yield potential of the corn crop, apply NorthStar at 5 oz./A plus adjuvants when corn
is between 4 and 12 inches tall (V2-V4) and weeds are within the height ranges listed in Tables 1 and
2. NorthStar at 5 oz./A plus spray adjuvants may be applied postemergence over-the-top, directed, or
semi-directed when weed(s) are within the height range specified for optimum control in Tables 1
and 2, and when the height of the field corn is between 4 and 20 inches (V2-V6). Good weed spray
coverage is essential for optimum effectiveness of NorthStar. To ensure good spray coverage of the
weeds and avoid potential crop injury, applications made after field corn is 20 inches tall (V6), up to
36 inches tall, or 15 days before tassel emergence, whichever comes first, should only be directed or
semi-directed with drop nozzles. Do not make over-the-top applications of NorthStar to inbred lines
of field corn or popcorn. NorthStar can only be applied directed or semi-directed when inbred lines
of field corn and popcorn are between 10 and 36 inches tall, or 15 days before tassel emergence,
whichever comes first.
NorthStarâ„?
Grass and broadleaf weeds, which are controlled following postemergence application of 5 oz./A of
NorthStar, are listed in Tables 1 and 2. If weeds other than those listed in Tables 1 and 2 are
anticipated, make a separate application of an appropriately labeled preplant, preemergence, or
postemergence herbicide or herbicide combination.
Applications of NorthStar to corn during rapid growth may result in yellowing and/or temporary
leaning. Corn will usually regain color and become erect within 3-7 days. Cultivation should be
delayed until after corn is growing normally to avoid breakage.
Field Corn Grown for Seed and Popcorn: NorthStar applications to tolerant field corn inbred lines or
popcorn must be directed or semi-directed when the height of the corn is between 10 and 36 inches
tall, or 15 days before tassel emergence, whichever comes first. Refer to Use Precaution 7 for
additional information.
Cultivation is recommended to control reinfestation that may occur from weed regrowth or late
germination of weeds and to improve weed control under dry conditions. A waiting period of 7 days
after a NorthStar application is recommended before making a cultivation or weed control may be
reduced. Where shattercane is the target weed species, NorthStar may be applied at cultivation, but
some regrowth of shattercane may occur. Apply NorthStar ahead of cultivators.
For optimum control of johnsongrass, cultivation or a follow-up application of Beacon® at 0.25 oz./A
or Accent at 0.33 oz./A is recommended to control reinfestation that may occur from regrowth. The
application should be made when the weed height is within the range specified for optimum control
in Table 1 and when the field corn height does not exceed 20 inches. After several years use of
NorthStar or Beacon or other products for johnsongrass or shattercane control, populations of these
weeds may be substantially reduced. Refer to the Beacon or Accent labels for directions for use.
Restrictions: To avoid possible illegal crop residues: (1) Do not graze or feed forage from NorthStar-
treated corn to livestock within 30 days after application. (2) Do not harvest silage within 45 days
after application. (3) Do not harvest grain within 60 days after application. (4) Do not make more
than one NorthStar application per season at 5 oz./A. (5) All applications of NorthStar to corn should
be made no later than 15 days before tassel emergence.
Table 1: Grass Weed Species Controlled or Partially Controlled with NorthStar Applied at 5 oz./A
Weed Height Range for
Grass Weed Species Optimum Control (inches)
Foxtails (Setaria spp.) 3,4 1-3
Johnsongrass, Rhizome (Sorghum halepense) 1, 3,4 8-16
Johnsongrass, Seedling (Sorghum halepense) 3 4-12
Nutsedge, Yellow (Cyperus esculentus) 3 1-4
Panicum, Fall (Panicum dichotomiflorum) 1-3
Quackgrass (Elytrigia repens) 2 (formerly Agropyron repens) 4-8
Ryegrass, Annual (Lolium multiflorum) 1-4
Sandbur (Cenchrus spp.) 3 1-4
Shattercane (Sorghum bicolor) 4 4-12
Sorghum-almum (Sorghum almum) 4 4-12
bicolor) 4
Sorghum, Volunteer (Sorghum 4-12
1 Regrowth may occur. Control unacceptable regrowth with cultivation or a subsequent application of
Accent or Beacon as described above.
2 Control of quackgrass is slower compared to other grass weed species. NorthStar may only provide
partial control of quackgrass under heavy infestations. Control can be improved by tank mixing
NorthStar at 5 oz./A with Beacon at 0.25 oz./A.
3 Partialcontrol. Control is most effective under conditions favorable for weed growth (i.e., adequate
moisture, optimum temperature conditions, etc.). Grass or sedge control may be improved by tank
mixing NorthStar at 5 oz./A with Beacon at 0.25 oz./A. Do not use NorthStar to control these species
if the weeds are subject to stress conditions (i.e., drought, cold temperatures, etc.), or are not
actively growing. Some other means of control should be used if infestations are severe.
4 Certainbiotypes of this weed species are known to be resistant to this and other ALS herbicides.
Where these ALS-resistant biotypes are known or suspected to exist, an appropriate registered
herbicide, active against that weed and with another mode of action, should be used alone or in
tank mix combination with NorthStar to control these biotypes.
NorthStarâ„?
Table 2: Broadleaf Weed Species Controlled or Partially Controlled with NorthStar Applied at 5 oz./A
Weed Height Range for
Broadleaf Weed Species Optimum Control (inches)
Alfalfa (Medicago sativa) 1 1-6
Amaranth, Palmer (Amaranthus palmeri ) 1-4
Amaranth, Powell (Amaranthus powellii ) 1-4
Artichoke, Jerusalem (Helianthus tuberosus) 1-4
Beggarweed, Florida (Desmodium tortuosum) 1-4
Bindweed, Field (Convolvulus arvensis) 1-3
sepium) 1
Bindweed, Hedge (Calystegia 1-3
Blackberry, Wild (Rubus spp.) 1 1-3
Buckwheat, Wild (Polygonum convolvulus) 1-3
Burcucumber (Sicyos angulatus) 1-4
Carpetweed (Molluga verticillata) 1-3
Cocklebur, Common (Xanthium strumarium) 1-6
Dandelion (Taraxacum officinale) 1 1-3
Devilsclaw (Proboscidea louisianica) 1-4
cannabinum) 1
Dogbane, Hemp (Apocynum 6-12
Eveningprimrose, Cutleaf (Oenothera laciniata) 1-3
Horsenettle (Solanum carolinense) 1 2-6
canadensis) 1
Horseweed ( Marestail, Conyza 6-12
Ivy, Poison (Rhus radicans) 1 1-3
Jimsonweed (Datura stramonium) 1-6
Kochia (Kochia scoparia) 2 1-4
Ladysthumb (Polygonum persicaria) 1-4
Lambsquarters, Common (Chenopodium album) 3 1-4
Morningglory (Ipomoea spp.) 1 1-3
Mustard, Wild (Sinapsis arvensis) 1-4
Nightshade, Black (Solanum nigrum) 1-6
Nightshade, Eastern Black (Solanum ptycanthum) 1-6
Nightshade, Hairy (Solanum sarrachoides) 1-4
Pigweeds (Amaranthus spp.) 1-5
Puncturevine (Tribulus terrestris) 1-4
Purslane, Common (Portulaca aleracea) 1-3
Pusley, Florida (Richardia scabra) 1-3
Radish, Wild (Raphanus raphanistrum) 1-4
Ragweed, Common (Ambrosia artemisiifolia) 2-9
Ragweed, Giant (Ambrosia trifida) 2-9
Sesbania (Sesbania exaltata) 1-4
Sicklepod (Cassia obtusifolia) 1-3
Sida, Prickly (Sida spinosa) 1-4
Smartweed, Pennsylvania (Polygonum pensylvanicum) 1-4
Sunflowers (Helianthus spp.) 2-9
Thistle, Canada (Cirsium arvense) 1-6
Thistle, Russian (Salsola iberica) 1 1-4
Velvetleaf (Abutilon theophrasti) 2 1-4
Waterhemp, Common (Amaranthus rudis) 1-4
Waterhemp, Tall (Amaranthus tuberculatus) 1-4
control. Banvel or Clarity at 2-4 oz. of product per acre or Marksman at 1/2-1 pt./A can be tank
1 Partial
mixed with NorthStar to improve the control of weeds listed as partial control. Use nonionic
surfactant with or without nitrogen if Banvel, Clarity, or Marksman is added. Do not use crop oil
concentrate with these tank mixes. Do not apply Marksman if corn is greater than 12 inches tall.
NorthStarâ„?
2 Crop oil concentrate plus liquid nitrogen fertilizer or ammonium sulfate are recommended spray
adjuvants when corn is less than 12 inches tall (refer to Mixing Procedures).
3 Including triazine-resistant biotypes.
NorthStar Tank Mix Combinations For Weed Control In Corn
Prior to all NorthStar applications, a preemergence herbicide such as Dual II, Dual II MAGNUM, Bicep
II, Bicep II MAGNUM, Bicep Lite II, Bicep Lite II MAGNUM, or Dual II + AAtrex should be applied for
grass control, and to improve control of several of the weeds listed in Tables 1-6.
NorthStar may be applied postemergence in tank mix combinations for improved control of various
weeds. For all tank mixtures of NorthStar with other herbicides listed on this label, refer to both
labels for weeds controlled and application information; and follow all restrictions and precautions
on both labels.
Precautions for Tank Mix Combinations: (1) NorthStar applied alone or in tank mixtures with
AAtrex/atrazine, Accent, Resource, or Tough can be applied using either a nonionic surfactant or crop
oil concentrate with or without liquid nitrogen or ammonium sulfate. Refer to item 7 under Mixing
Procedures for information on rates and timing of the various additives. (2) Do not use crop oil
concentrate as the spray adjuvant when using tank mixtures with Banvel, Clarity, or Marksman. In
mixtures with those products, use only a nonionic surfactant with a minimum of 80% of the
constituents effective as a spray adjuvant at the rate of 1 qt./100 gals. of spray volume (0.25%
volume/volume). (3) Do not apply NorthStar in tank mixture with cyanazine (Bladex® or Extrazine®
II), or severe crop injury may result. (4) Syngenta does not recommend tank mixtures of NorthStar
with other agricultural products not listed on this label due to the possibility of reduced control, crop
injury, or other undesirable interactions. When NorthStar is applied in tank mixtures with other
products, follow the most restrictive labeling requirements.
For postemergence control of weeds actively growing in corn, NorthStar will control the weeds listed
in:
� Table 3 when tank mixed with AAtrex (atrazine)
� Table 4 when tank mixed with Accent
� Table 5 when tank mixed with Resource
� Table 6 when tank mixed with Tough
With all tank mixtures containing atrazine, application must be made before the corn exceeds 12
inches in height and the total atrazine applied may not exceed 2.5 lbs. a.i./A per calendar year. Do
not exceed the total atrazine rate limitations specified on the AAtrex (atrazine) label. Control of
relatively large cocklebur, sunflower, and velvetleaf may be reduced when NorthStar is applied with
atrazine-containing products.
Table 3: Broadleaf Weeds Controlled with Tank Mixtures of NorthStar at 5 oz./A with AAtrex 4L
(Atrazine) at 2-3 pts./A1
Weed Height Range for
Broadleaf Weed Species3 Optimum Control (inches)
Cocklebur, Common 1-6
Jimsonweed 1-6
Kochia 1-4
Lambsquarters, Common 1-5
Morningglories 1-4
Nightshade, Eastern Black 1-6
Pigweed, Redroot 1-5
Pigweed, Smooth 1-5
Ragweed, Common 2-9
Ragweed, Giant 2-9
Smartweed, Pennsylvania 1-4
Sunflowers 2-9
Velvetleaf 2 1-4
Waterhemp, Common 1-4
Waterhemp, Tall 1-4
1 Tank mix applications of NorthStar and Atrazine may provide additional control of these weeds,
especially where residual activity is desired. Other formulations of Atrazine may be substituted,
provided the Atrazine dosage is adjusted to apply 1-1.5 lbs. a.i./A. Do not exceed the total atrazine
rate limitations specified on the AAtrex (atrazine) label.
2 Crop oil concentrate plus liquid nitrogen fertilizer or ammonium sulfate are recommended spray
adjuvants for velvetleaf control. Refer to Mixing Procedures for additional adjuvant information.
3 Atrazine will not improve control of triazine-tolerant biotypes. Refer to Table 1 and Table 2 for a
complete listing of weeds controlled by NorthStar.
NorthStarâ„?
Table 4: Grasses Controlled with Tank Mixtures of NorthStar at 5 oz./A in Combination with Accent
at One-half to Full Rate Based on the Product’s Allowable Use Rate1
Weed Height Range for
Weed Species Optimum Control (inches)
Barnyardgrass 1-4
Cupgrass, Woolly 2 1-4
Foxtails, Giant 1-4
Foxtails, Green 1-4
Foxtails, Yellow 1-4
Johnsongrass, Rhizome 8-16
Johnsongrass, Seedling 4-12
Proso 2
Millet, Wild 1-4
Oats, Wild 1-4
Panicum, Fall 1-4
Panicum, Texas 1-4
Quackgrass 4-8
Shattercane 4-12
Signalgrass, Broadleaf 1-3
Sorghum, Volunteer 4-12
1 NorthStar + Accent tank mixtures are for rescue control of escaped grasses and broadleaf weeds
following preemergence treatments of a grass herbicide such as Dual or Bicep brands. Refer to
Table 2 for a complete list of broadleaf weeds controlled by NorthStar. Refer to Mixing Procedures
for adjuvant information.
2For improved control of heavy infestations, use the full labeled rate of Accent.
Table 5: Velvetleaf Control with Tank Mixtures of NorthStar at 5 oz./A with Resource at 4 oz./A1
Weed Height Range for
Broadleaf Weed Species Optimum Control (inches)
Velvetleaf 2 1-6
1 Refer to Table 1 and Table 2 for a complete list of weeds controlled by NorthStar.
2 Improved velvetleaf control may be achieved by tank mixing NorthStar and Resource. Crop oil
concentrate plus liquid nitrogen fertilizer or ammonium sulfate are recommended spray adjuvants
when corn is less than 12 inches tall. Refer to Mixing Procedures for additional adjuvant
information.
Table 6: Broadleaf Weeds Controlled with Tank Mixtures of NorthStar at 5 oz./A with Tough at
1-2 pts./A1
Weed Height Range for
Broadleaf Weed Species Optimum Control (inches)
Jimsonweed 1-6
Kochia 1-5
Pigweeds 1-5
Lambsquarters, Common 1-5
1 Referto Table 1 and Table 2 for a complete listing of weeds controlled by NorthStar. Improved
broadleaf weed control may be obtained by applying a tank mixture of NorthStar and Tough. Refer
to Mixing Procedures for adjuvant information.
NorthStarâ„?
AAtrex ®, CustomPak�, Beacon ®, Bicep II ®, Bicep II MAGNUM®, Bicep Lite II®, Bicep Lite II
MAGNUM®, Dual II ®, Dual II MAGNUM®, Dyfonate ®, NorthStar ®, Tough® and the Syngenta logo
are trademarks of a Syngetna Group Company
U.S. Patent No. 4,478,635
Accent ®, Bladex ®, and Extrazine ® trademarks of E. I. duPont de Nemours and Company, Inc.
Banvel ®, Clarity ®, Marksman®, Poast ®, and Poast Plus ® trademarks of BASF Corporation
Clorox ® trademark of Clorox Company
Counter ® CR ® and Thimet ® trademarks of American Cyanamid Company
Lorsban ® trademark of Dow AgroSciences
RF Raindrop ® trademark of Delaran-Delta, Inc.
Resource® trademark of Valent U.S.A. Corporation
X-77 ® trademark of Loveland Industries, Inc.
XR ® trademark of Spraying Systems Company
©2001 Syngenta
For non-emergency (e.g., current product information), call
Syngenta Crop Protection at 1-800-334-9481.
Syngenta Crop Protection, Inc.
Greensboro, North Carolina 27409
www.syngenta-us.com
SCP 923A-L1E 0301
NorthStarâ„?
®
Herbicide
For postemergence weed control in field corn
(grown for grain, silage, or seed) and popcorn
Active Ingredients:
Primisulfuron-methyl: 3-[4,6-Bis See directions for use in attached booklet. If on skin: Wash with plenty of soap and water.
(difluoromethoxy)-pyrimidin-2-yl]-1-(2- Get medical attention if symptoms persist.
AGRICULTURAL USE
methoxycarbonylphenylsulfonyl) urea . . . . . 7.5% If in eyes: Flush eyes with plenty of water. Call
Sodium salt of dicamba (3,6-dichloro- REQUIREMENTS a physician if irritation persists.
o-anisic acid*). . . . . . . . . . . . . . . . . . . . . . 43.9% Use this product only in accordance with Note to Physician: If ingested, emesis or lavage
its labeling and with the Worker stomach. Treat symptomatically.
Other Ingredients: 48.6%
Protection Standard, 40 CFR part 170. HOT LINE NUMBER: For 24 Hour Medical
Total: 100.0% Refer to supplemental labeling under Emergency Assistance (Human or Animal) or
“Agricultural Use Requirements� in the
*This product contains 39.9% 3,6-dichloro-o-anisic Chemical Emergency Assistance (Spill, Leak, Fire,
Directions for Use section for informa-
acid (dicamba). or Accident) Call 1-800-888-8372
tion about this standard.
Environmental Hazards
NorthStar is a water-dispersible granule.
Do not apply directly to water, to areas where
KEEP OUT OF REACH OF
EPA Reg. No. 100 -923
surface water is present, or to intertidal areas
CHILDREN.
EPA Est. 100-LA-001 below the mean high water mark. Do not cont-
CustomPak� and NorthStar ® and Syngenta logo aminate water when disposing of equipment
CAUTION
are trademarks of a Syngenta Group Company wash water or rinsate.
U.S. Patent No.4,478,635 Ground Water Advisory
PRECAUTIONARY STATEMENTS Dicamba has been identified in ground water
©2001 Syngenta
Hazards to Humans and Domestic Animals sampling under vulnerable conditions. There is
Syngenta Crop Protection, Inc. Harmful if swallowed or absorbed through skin. the possibility that the dicamba in NorthStar
Greensboro, North Carolina 27409 Causes moderate eye irritation. Avoid contact may leach through soil to ground water, espe-
www.syngenta-us.com with skin, eyes, or clothing. Wash thoroughly cially where soils are coarse and ground water is
SCP 923A-L1E 0301 with soap and water after handling. near the surface. Consult with the pesticide state
FIRST AID lead agency or local agricultural agencies for
information regarding soil permeability and
If swallowed: Call a physician or Poison
aquifer vulnerability in your area.
Control Center. Drink 1 or 2 glasses of water
6 lbs. 4 oz. and induce vomiting by touching back of throat Chemigation
with finger. If person is unconscious, do not give Do not apply this product through any type of
Net Weight
anything by mouth and do not induce vomiting. irrigation system.
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