crop-chem-docs/corpus/bayer/varro.md

# Varro Herbicide

- **Product class:** herbicide
- **EPA Reg No:** 264-1062
- **Active ingredients:** Thiencarbazone-methyl
- **Source:** https://www.cropscience.bayer.us/crop-protection/herbicide/varro-herbicide
- **Label PDF:** https://cs-assets.bayer.com/is/content/bayer/Varro2h_Labelpdf

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130 mm
145 mm
Net Contents:
2.14 Gallons
THIENCARBAZONE-METHYL GROUP 2 HERBICIDE
US81708754E (181005E) LABMC VARRO Herbicide  2.14 Gal ETL
colors: cmyk      5/16/19
Produced for:
Bayer CropScience LP
800 N. Lindbergh Blvd.
St. Louis, MO 63167
VARRO is a registered trademark of Bayer.
©2019 Bayer CropScience
Product of Germany
For: Post-emergence control of certain grasses and broadleaf weeds in winter
wheat and spring wheat (including durum)
US81708754E            181005E  05/19ACTIVE INGREDIENT:
Thiencarbazone-methyl (Methyl 4-[[[(4,5-dihydro-
 3-methoxy-4-methyl-5-oxo-1H-1,2,4-triazol-
 1-yl)carbonyl]amino]sulfonyl]-5-methyl-3-
 thiophenecarboxylate)  ................... 1.00%
OTHER INGREDIENTS: ................. 99.00%
 TOTAL:  100.00%
Contains Petroleum Distillates
Contains 0.083 pounds thiencarbazone–methyl per
U.S. gallon
EPA Reg. No. 264-1062 EPA Est. No. 264-DEU-001
KEEP OUT OF REACH
OF CHILDREN
CAUTION
For MEDICAL and TRANSPORTATION Emergencies ONLY
Call 24 Hours a Day 1-800-334-7577
For PRODUCT USE Information Call 1-866-99BAYER
(1-866-992-2937)
Please refer to booklet for additional precautionary
statements and directions for use.

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FIRST AID
If Swallowed: • Immediately call a poison control center or doctor for treatment advice.
• Do not induce vomiting unless told to do so by a poison control center or doctor.
• Do not give any liquid to the person.
• Do not give anything by mouth to an unconscious person.
If Inhaled: • Move person to fresh air.
•	If	person	is	not	breathing,	call	911	or	an	ambulance,	then	give	artificial	respiration,
preferably by mouth-to-mouth, if possible.
•  Call a poison control center or doctor for further treatment advice.
If on Skin or
Clothing:
• Take off contaminated clothing.
• Rinse skin immediately with plenty of water for 15-20 minutes.
•  Call a poison control center or doctor for treatment advice.
If in Eyes: • Hold eye open and rinse slowly and gently with water for 15-20 minutes.
•	Remove	contact	lenses,	if	present,	after	the	first	5	minutes,	then	continue	rinsing.
•  Call a poison control center or doctor for treatment advice.
In case of emergency, call the toll-free Bayer CropScience Emergency Response telephone number: 1-800-334-7577.
Have a product container or label with you when calling a poison control center or doctor, or going for treatment.
Note to Physician: May	 pose	 an	 aspiration	 pneumonia	 hazard.	 Contains	 petroleum	 distillate.	 No	 specific
antidote is available. All treatments should be based on observed signs and symptoms of distress in the
patient. Overexposure to materials other than this product may have occurred.
PRECAUTIONARY STATEMENTS
HAZARDS TO HUMANS AND DOMESTIC ANIMALS
CAUTION
• Harmful if swallowed, inhaled or absorbed through the skin.
• Causes moderate eye irritation.
• Avoid breathing vapors, or spray mist.
• Avoid contact with skin, clothing or eyes.
PERSONAL PROTECTIVE EQUIPMENT (PPE)
Applicators and other handlers must wear:
• Long-sleeved shirt and long pants
• Socks
• Shoes
•	Chemical-resistant	gloves	made	of	materials	made	of	barrier	laminate	or	viton	≥	14	mils.
USER SAFETY REQUIREMENTS
Follow manufacturer’s instructions for cleaning/maintaining PPE.  If no such instructions for washables exist,
use detergent and hot water.  Keep and wash PPE separately from other laundry.
USER SAFETY RECOMMENDATIONS
• Users should wash hands before eating, drinking, chewing gum, using tobacco or using the toilet.
• Users should remove clothing/PPE immediately if pesticide gets inside. Then wash thoroughly and put on
clean clothing.
• Users should 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.

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ENGINEERING CONTROLS
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.
ENVIRONMENTAL HAZARDS
Do not apply directly to water or 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 washwater or rinsate.
Surface Water Advisory
This product may impact surface water quality due to runoff of rain water. This is especially true for poorly
draining soils and soils with shallow ground water. This product is classified as having “high potential for
reaching surface water via runoff”, according to the pesticide’s “mean” soil partition coefficient (Kd) for several
days after application. A level, well-maintained vegetative buffer strip between areas to which this product is
applied and natural surface water features such as ponds, streams and springs will reduce potential loading
of Thiencarbazone-methyl from runoff water and sediment. Runoff of this product will be reduced by avoiding
applications when rainfall is forecasted to occur within 48 hours.
Ground Water Advisory
This chemical has properties and characteristics associated with chemicals detected in ground water. This
chemical may leach into ground water if used in areas where soils are permeable, particularly where the
water table is shallow.
Endangered Species Advisory/Protection Requirements
This product may have effects on federally listed threatened or endangered species or their critical habitat
in some locations. When using this product, you must follow the measures contained in the Endangered
Species Protection Bulletin for the county or parish in which you are applying the pesticide. To determine
whether your county or parish has a Bulletin, and to obtain that Bulletin, consult http://www.epa.gov/espp/,
or call 1-800-447-3813 no more than 6 months before using this product. Applicators must use Bulletins that
are in effect in the month in which the pesticide will be applied. New Bulletins will generally be available from
the above sources 6 months prior to their effective dates.
CONDITIONS OF SALE AND LIMITATIONS OF WARRANTY AND LIABILITY
Read the entire Directions for Use, Conditions, Disclaimer of Warranties and Limitations of Liability before
using this product.  If terms are not acceptable, return the unopened product container at once.
By using this product, user or buyer accepts the following Conditions, Disclaimer of Warranties and Limitations
of Liability.
CONDITIONS: The directions for use of this product are believed to be adequate and must be followed
carefully. However, it is impossible to eliminate all risks associated with the use of this product.  Crop injury,
ineffectiveness or other unintended consequences 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 Bayer
CropScience.  To the extent consistent with applicable law, all such risks shall be assumed by the user or
buyer.
DISCLAIMER OF WARRANTIES: TO THE EXTENT CONSISTENT WITH APPLICABLE LAW, BAYER
CROPSCIENCE MAKES NO OTHER WARRANTIES, EXPRESS OR IMPLIED, OF MERCHANTABILITY
OR OF FITNESS FOR A PARTICULAR PURPOSE OR OTHERWISE, THAT EXTEND BEYOND THE
STATEMENTS MADE ON THIS LABEL. No agent of Bayer CropScience is authorized to make any warranties
beyond those contained herein or to modify the warranties contained herein. TO THE EXTENT CONSISTENT
WITH APPLICABLE LAW, BAYER CROPSCIENCE DISCLAIMS ANY LIABILITY WHATSOEVER FOR
(continued)

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SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES RESULTING FROM THE USE OR HANDLING
OF THIS PRODUCT.
LIMITATIONS OF LIABILITY: TO THE EXTENT CONSISTENT WITH APPLICABLE LAW, THE EXCLUSIVE
REMEDY OF THE USER OR BUYER FOR ANY AND ALL LOSSES, INJURIES OR DAMAGES RESULTING
FROM THE USE OR HANDLING OF THIS PRODUCT, WHETHER IN CONTRACT, WARRANTY, TORT,
NEGLIGENCE, STRICT LIABILITY OR OTHERWISE, SHALL NOT EXCEED THE PURCHASE PRICE PAID,
OR AT BAYER CROPSCIENCE’S ELECTION, THE REPLACEMENT OF PRODUCT.
DIRECTIONS FOR USE
It is a violation of Federal law to use this product in a manner inconsistent with its labeling.
Read the entire label before using this product.
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.
For Important crop safety information, refer to the Use Directions section under the specific crop.
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,	and	emergency	assistance.	It	also	contains	specific	instructions	and	exceptions	pertaining
to	 the	 statements	 on	 this	 label	 about	 personal	 protective	 equipment	 (PPE),	 notification	 to	 workers,	 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 4 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:
• Coveralls
• Socks
• Shoes
•	 Chemical-resistant	gloves	made	of	barrier	laminate	or	viton	≥	14	mils.
• Protective eyewear
PRODUCT INFORMATION
Varro® Herbicide:
• is applied as a postemergence foliar spray in winter wheat and spring wheat (including durum) for the control of
certain annual grasses and broadleaf weeds.
APPLICATION INSTRUCTIONS
• Weed infestations should be treated before they become competitive with the crop. Make applications to actively
growing weeds. Thorough coverage of weeds is necessary to obtain good weed control. Weed control may be
reduced when weeds are under stress due to severe weather conditions, drought, very cold temperatures, etc.
• Properly calibrate ground or aerial (fixed wing or helicopter) application equipment to apply Varro Herbicide
postemergence as a foliar spray. Use of nozzles and spray pressure that deliver medium to coarse  spray droplets as
indicated in the nozzle manufacturer’s catalogs and in accordance with ASABE Standard S-572 for optimum spray
coverage and canopy penetration.
• Avoid uneven spray distribution, skips, overlaps, and spray drift.

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Aerial Application
Calibrate the spray equipment prior to use. Varro Herbicide should be applied in a minimum of 5 gallons of
water per broadcast acre. To get uniform spray coverage, use nozzles and pressure that deliver medium to
coarse spray droplets as indicated in nozzle manufacturer’s catalogs and in accordance with ASABE standard
S-572. DO NOT use raindrop nozzles.
Aerial applications with this product should be made at a maximum height of 10 feet above the crop with
low drift nozzles. Avoid application under conditions where uniform coverage cannot be obtained or where
excessive spray drift may occur.
See the Spray Drift Management section of this label for additional information on proper application of Varro
Herbicide.
Ground Application
Apply Varro Herbicide broadcast in 10 or more gallons of water per acre.
To obtain uniform spray coverage, use nozzles and pressure that deliver medium to coarse spray droplets as
indicated in nozzle manufacturer’s catalogs and in accordance with ASABE standard S-572.  Use screens that
are 50 mesh or larger. See the Spray Drift Management section of this label for additional information on proper
application of Varro Herbicide.
USE RESTRICTIONS
• Do not apply Varro Herbicide to crops undersown with grass or legume species.
• Do not make more than a total of one application of Varro Herbicide per 365 days.
• Do not apply more than 6.85 fl oz/acre of Varro Herbicide per 365 days.
• A 25 foot buffer for ground applications, or a 200 foot buffer for aerial applications, must be maintained
between the point of direct application and the closest downwind edge of sensitive terrestrial habitats
(including grasslands, forested areas, shelter belts, woodlots, hedgerows, riparian areas and shrub lands),
sensitive freshwater habitats (including lakes, rivers, sloughs, ponds, creeks, marshes, streams, reservoirs
and wetlands) and estuarine/marine habitats.
• Do not apply in combination with Dicamba containing products as grass control will be reduced.
• DO NOT apply Varro Herbicide through any type of irrigation system.
• Do not drain or rinse equipment near desirable vegetation.
• Do not apply to winter, spring or durum wheat after jointing.
• Do not harvest or graze wheat forage within 7 days after application.
• Do not harvest wheat for hay within 30 days after application.
• Do not harvest wheat for grain or straw within 60 days after application in Minnesota, Montana, North Dakota,
or South Dakota; and within 70 days in all other states.
USE PRECAUTIONS
• Avoid spray drift from treated areas. Refer to the Spray Drift Management section of this label for additional
information.
• Varro Herbicide is rainfast 1 hour after application to most weed species. Rainfall within 1 hour may result in
reduced weed control.
• Non-target plants may be adversely affected if the pesticide is allowed to drift from areas of application. To
prevent damage to crops and other desirable plants, read and follow all directions and precautions on this
label before using.
• Environmental conditions which support vigorous growth of crop and weeds also result in highest herbicidal
activity. Following application, symptoms of herbicidal activity may develop within several days. Speed of
action depends on environmental conditions and increases with increasing temperature and moisture.
(continued)

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• Applications of Varro Herbicide in winter, spring or durum wheat in combination with some EC herbicides may
cause crop response (see tankmix section).
• Applications during low temperatures (32 F° or lower), high temperatures (90 F° or greater), or to a crop under
drought stress can cause crop injury.
HERBICIDE RESISTANCE MANAGEMENT (WSSA) RECOMMENDATIONS
For resistance management, Varro Herbicide is a Group 2 herbicide. Any weed population may contain or develop
plants naturally resistant to Varro Herbicide and other Group 2 herbicides. The resistant biotypes may dominate
the weed population if these herbicides are used repeatedly in the same field. Appropriate resistance management
strategies should be followed.
To delay herbicide resistance take one or more of the following steps:
• Rotate the use of Varro Herbicide or other Group 2 herbicides within a growing season sequence or among
growing seasons with different herbicide groups that control the same weeds in a field.
• Use tank mixtures with herbicides from a different group if such use is permitted; where information on resistance
in target weed species is available, use the less resistance-prone partner at a rate that will control the target
weed(s) equally as well as the more resistance-prone partner. Consult your local extension service or certified
crop advisor if you are unsure as to which active ingredient is currently less prone to resistance.
• Adopt an integrated weed-management program for herbicide use that includes scouting and uses historical
information related to herbicide use and crop rotation, and that considers tillage ( or other mechanical control
methods), cultural ( e.g., higher crop seeding rates; precision fertilizer application method and timing to favor the
crop and not the weeds), biological (weed-competitive crops or varieties) and other management practices.
• Scout after herbicide application to monitor weed populations for early signs of resistance development.
Indicators of possible herbicide resistance include: (1) failure to control a weed species normally controlled by
the herbicide at the dose applied, especially if control is achieved on adjacent weeds; (2) a spreading patch of
non-controlled plants of a particular weed species; (3) surviving plants mixed with controlled individuals of the
same species. If resistance is suspected, prevent weed seed production in the affected area by an alternative
herbicide from a different group or by a mechanical method such as hoeing or tillage. Prevent movement of
resistant weed seeds to other fields by cleaning harvesting and tillage equipment when moving between fields,
and planting clean seed.
• If a weed pest population continues to progress after treatment with this product, discontinue use of this product,
and switch to another management strategy or herbicide with a different mode of action, if available.
• Contact your local extension specialist or certified crop advisors for additional pesticide resistance-management
and/or integrated weed-management recommendations for specific crops and weed biotypes.
• For further information or to report suspected resistance contact Bayer CropScience at 1-866-99BAYER
(1-866-992-2937). You can also contact your pesticide distributor or university extension specialist to report
resistance.
SPRAY DRIFT MANAGEMENT
Varro Herbicide is not volatile. Damage to sensitive crops can occur as a result of spray drift. Spray drift
can be managed by several application factors and by spraying under the appropriate climatic conditions.
Consequently, avoidance of spray drift is the responsibility of the applicator and grower.
Avoiding spray drift at the application site is the responsibility of the applicator and grower. The interaction of
many equipment-and-weather-related factors determine the potential for spray drift. The applicator and the
grower are responsible for considering all these factors when making decisions.
Where states have more stringent regulations, they shall be observed.
Only apply this product when the potential for drift to adjacent non-target areas is minimal (e.g., when wind is
10 MPH or less and is blowing away from sensitive areas).
To avoid potential adverse effects to non-target areas, you must maintain a 25 foot buffer for ground
applications, or a 200 foot buffer for aerial applications between the point of direct application and the
closest downwind edge of sensitive terrestrial habitats (including grasslands, forested areas, shelter belts,
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woodlots hedgerows, riparian areas and shrub lands), sensitive freshwater habitats (including lakes, rivers,
sloughs, ponds, creeks, marshes, streams, reservoirs and wetlands) and estuarine/marine habitats.
Droplet Size
To obtain uniform spray coverage and reduce spray drift, equip sprayers with nozzles that provide medium to
coarse spray droplets as defined in ASABE Standard S572.1.
The most effective way to reduce drift potential is to apply large droplets. The best drift management strategy
is to apply the largest droplets that provide sufficient coverage and control. Applying larger droplets reduces
drift potential, but will not prevent drift if applications are made improperly, or under unfavorable environmental
conditions. When making applications in low relative humidity, set up equipment to produce larger droplets to
compensate for evaporation. Droplet evaporation is most severe when conditions are both hot and dry. Avoid
spraying during conditions of low humidity and/or high temperatures.
• Volume - Use high flow rate nozzles to apply the highest practical spray volume. Nozzles with higher rated
flows produce larger droplets.
• Pressure - Do not exceed the nozzle manufacturer’s recommended pressures. For many nozzle types lower
pressure produces larger droplets. When higher flow rates are needed, use higher flow rate nozzles instead of
increasing pressure.
• Number of nozzles - Use the minimum number of nozzles that provide uniform coverage.
• Nozzle Orientation - Orienting nozzles so that the spray is released parallel to the airstream produces larger
droplets than other orientations and is the recommended practice. Significant deflection from horizontal will
reduce droplet size and increase drift potential.
• Nozzle Type - Use a nozzle type that is designed for the intended application. With most nozzle types, narrower
spray angles produce larger droplets. Consider using low-drift nozzles. Solid stream nozzles oriented straight
back produce the largest droplets and the lowest drift.
Wind Speed
Drift potential is lowest between wind speeds of 2 - 10 mph. However, many factors, including droplet size and
equipment type determine drift potential at any given speed. Application must be avoided below 2 mph due to
variable wind direction and high inversion potential. NOTE:  Local terrain can influence wind patterns. Every
applicator must be familiar with local wind patterns and how they affect spray drift.
For all non-aerial applications, wind speed must be measured adjacent to the application site, on the upwind
side, immediately prior to application.
Temperature Inversions
Do not make aerial or ground applications into areas of temperature inversions because drift potential is high.
Temperature inversions restrict vertical air mixing, which causes small suspended droplets to remain in a
concentrated cloud. This cloud can move in unpredictable directions due to the light variable winds common
during inversions. Temperature inversions are characterized by increasing temperatures with altitude and are
common on nights with limited cloud cover and light to no wind. They begin to form as the sun sets and
often continue into the morning. Their presence can be indicated by ground fog; however, if fog is not present,
inversions can also be identified by the movement of smoke from a ground source or an aircraft smoke
generator. Smoke that layers and moves laterally in a concentrated cloud (under low wind conditions) indicates an
inversion, while smoke that moves upward and rapidly dissipates indicates good vertical air mixing.
Aerial Applications
• The distance of the outer most nozzles on the boom should not exceed 3/4 the length of the wingspan or rotor
diameter.  To further reduce drift, use 1/2 the length of the wingspan or rotor diameter at the edge of a field.
• Applications should not be made at a height greater than 10 feet above the top of the largest plants unless
a greater height is required for aircraft safety. Making applications at the lowest height that is safe reduces
exposure of droplets to evaporation and wind. (continued)

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• When applications are made with a crosswind, the swath will be displaced downwind. Therefore, on the up
and downwind edges of the field, the applicator must compensate for this displacement by adjusting the path
of the aircraft upwind. Swath adjustment distance should increase, with increasing drift potential (higher wind,
smaller drops, etc.).
Ground  Applications
• Apply with nozzle height no more than 4 feet above the ground or crop canopy.
COMPATIBILITY TESTING AND TANK MIX PARTNERS
Compatibility
If Varro Herbicide is to be tank mixed with liquid fertilizers or other pesticides, compatibility should be tested
prior to mixing. To test for compatibility, use a small container and mix a small amount (0.5 to 1 qt) of spray,
combining all ingredients in the same ratio as the anticipated use. If any indications of physical incompatibility
develop, do not use this mixture for spraying. Indications of incompatibility usually will appear within 5-15
minutes after mixing. Read and follow all parts of the label of each tank-mix product.
Tank Mix Instructions
For control of weeds not listed on this label, Varro Herbicide may be mixed with other herbicides with the
exception of dicamba containing products. It is the pesticide user’s responsibility to ensure that all products in
the listed mixtures are registered for the intended use. Read and follow the most restrictive directions for use
and precautionary statements of each product in the tank mixture.
Broadleaf Herbicides
Affinity	Tankmix® Express® Starane® 2, 5 /Starane NXT 2, 4 /
Starane Ultra2,4
 Sentrallas®
Affinity	BroadSpec® HUSKIE™ Starane® Flex2, 4
Bronate Advanced™ 1, 4 Harmony®  /Harmony Extra XP® Supremacy3
Buctril® 1, 4 MCPA Ester4 WideMatch™ 4
1 Equivalent bromoxynil based products may be substituted in a tank mix for these products.
2	Equivalent	fluroxypyr	product	may	be	substituted.
3	Equivalent	dry	formulation	products	containing	fluroxypyr	may	be	substituted.
4 Applications of Varro Herbicide in winter, spring or durum wheat in combination with these EC tankmix
partners or equivalents may cause crop response.
Grass Herbicides
Olympus1
1 Olympus can be added. Refer to Olympus label concerning crop rotation restrictions.
Tank Mixtures for Disease Control
Varro Herbicide may be applied in combination with Stratego ®, Headline, Quilt, Quadris, Tilt* ® or Topsin ® M
70WP fungicides for weed and disease control. Do not apply Varro Herbicide in tank mixture with tebuconazole.
Tank mix applications of herbicides with fungicides may cause temporary yellowing, leaf burn, and or height
reduction of the crop.  Refer to the specific fungicide label for use directions, application rates, restrictions and
a list of diseases controlled.
*Tilt or equivalent propiconazole products are limited to a maximum of 2 oz/A (0.0513 lb ai/A)

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Tank Mixtures for Insect Control
Varro Herbicide may be applied with Baythroid® XL, Mustang Max or Warrior® insecticides. Refer to the specific
insecticide label for use directions, application rates, restrictions and a list of insects controlled.
Order of Mixing
Varro Herbicide must be applied with clean and properly calibrated equipment. Prior to adding Varro Herbicide
to the spray tank, ensure that the spray tank, filters and nozzles have been thoroughly cleaned. In-line
strainers and nozzle screens should be 50 mesh or coarser.
1. Fill the spray tank 1/4 to 1/2 full with clean water and begin agitation or bypass.
2. Add the specified rate of Varro Herbicide directly to the spray tank. Maintain sufficient agitation during both mixing
and application.  DO NOT pre-slurry by adding any quantity of Varro Herbicide to a small amount of water.
3. Add a listed tank mix partner, if desired.
4. Fill the spray tank with balance of water needed.
5. Continue agitation during Varro Herbicide application to ensure uniform spray coverage.
NOTE: Varro Herbicide may settle if left standing without agitation.  If the spray solution is allowed to stand for
one hour or more, re-agitate the spray solution for a minimum of 10 minutes before application.
Equipment Cleanup Procedures
1. Drain the tank completely, and then wash out tank, boom and hoses with clean water. Drain again.
2. Half fill the tank with clean water and add ammonia (i.e., 3% domestic ammonia solution) at a dilution rate of
1% (i.e., 1 gallon of domestic ammonia for every 100 gallons of rinsate). Complete filling of the tank with water.
Agitate/recirculate and flush through boom and hoses. Leave agitation on for 10 minutes. Drain tank completely.
3. Repeat step 2.
4. Remove nozzles and screens and soak them in a 1% ammonia solution. Inspect nozzles and screens and
remove visible residues.
5. Flush tank, boom, and hoses with clean water.
6. Inspect tank for visible residues. If present, repeat step 2.
ROTATIONAL CROPS
In areas where a crop is not specified, conduct a field bioassay as described in the FIELD BIOASSAY section.
Crop Rotational Interval Crop Rotational Interval
Soybean 3 Months Lentils
9 Months
Wheat Mustard
Alfalfa
9 Months
Oats, spring
Barley Peas
Canola Safflower
Canaryseed Sorghum (grain)
Chickpeas Sugarbeets
Corn – Conventional Sunflowers
Dry Beans Timothy
Flax Potatoes 18 Months

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Cover Crops
Use of cover crops as a means of soil improvement, erosion control, weed and/or insect suppression, etc.,
following harvest in the fall is increasing. Planting of cover crops in fields treated with Varro Herbicide is allowed
as long as these cover crops are not grazed by livestock nor harvested for food. Cover crops are to be tilled
under or chemically controlled with burndown herbicides in the spring.  Many cover crops can be planted within
90-120 days after application of Varro Herbicide. However, all potential cover crops have not been evaluated
for tolerance to Varro Herbicide and significant injury may occur.  Prior to seeding a cover crop, complete a
successful field/ small scale bioassay to provide an indication of the level of tolerance to the prior Varro Herbicide
application. Refer to the “Field/Small Scale Bioassay” section.
Field/Small Scale Bioassay
A field/ small scale bioassay must be completed before rotating to a cover crop other than those specified in
the “Rotational Crop Restrictions” section of this label. To conduct an effective field bioassay, grow strips of the
crop(s) you intend to grow the following season in a field previously treated with Varro Herbicide. The test strip
should be placed in a controlled area and should include low areas and knolls, and include variations in soil such
as type and pH. Crop response to the bioassay will determine if the crop(s) grown in the test strips can be grown
safely in the areas previously treated with Varro Herbicide.
For an effective small scale bioassay, collect uniform samples of all soil types from the Varro Herbicide- treated
field and place the soil into a sturdy container.  Plant the desired cover crop into the soil, apply water and place
the container in a warm, sunny area to allow germination and growth of the crop.  Monitor growth of the cover
crop over a three to four week period.  If the cover crop emerges and grows normally, the risk to establish and
grow the cover crop in the Varro Herbicide-treated field should be tolerable.
WEEDS CONTROLLED & PARTIALLY CONTROLLED
Varro Herbicide effectively controls the following weeds when applied at the application timings recommended
and when weeds are actively growing. Best control is achieved when grass weeds are treated between the
1-leaf to 2-tiller stage of growth and broadleaf weeds are between the 1-6 leaf stage of growth, unless otherwise
indicated. Varro Herbicide will have an effect on weeds that are larger than the recommended leaf stage;
however the speed of activity and level of control may be reduced.
BROADLEAF WEEDS
Controlled Partial Control2
Common Name Common Name
Canola (volunteer) 1 Buckwheat, wild
Catchweed bedstraw (4 whorls) Lambsquarters, common
Chickweed, common 1 Pennsylvania smartweed
Field Pennycress Russian thistle1 (4” ht)
Hempnettle
Mustard, wild
Redroot pigweed1
Shepherd’s purse
1  Non-ALS tolerant
2  Partially controlled weeds will be stunted in growth and/or be reduced in number as compared to non-treated
areas but performance will not be commercially acceptable. The degree of weed control will vary with weed
size, density, coverage and growing conditions.

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GRASSES
Controlled Partial Control 1
Common Name Common Name
Barnyardgrass Japanese Brome
Green foxtail Persian darnel
Wild oat
Yellow Foxtail
1 Partially controlled weeds will be stunted in growth and/or be reduced in number as compared to non-
treated areas but performance will not be commercially acceptable. The degree of weed control will vary
with weed size, density, coverage and growing conditions.
SPECIFIC USE DIRECTIONS
SPRING, DURUM AND WINTER WHEAT
APPLICATION RATE
Unless otherwise specified by Bayer CropScience, do not use less than 6.85 fl oz per acre of Varro Herbicide.
Do not exceed 6.85 fl oz per acre in a single application.
APPLICATION TIMING
Varro Herbicide may be applied to wheat starting from the 1 leaf stage (fully expanded first true leaf) but prior
to jointing (presence of first node).
Pre-Harvest Interval (PHI): Applications may be made up to 60 - 70 days prior to harvest (60 days for
Minnesota, North Dakota, and South Dakota; 70 days in all other states).  Do not apply to wheat after jointing.
STORAGE AND DISPOSAL
Do not contaminate water, food, or feed by storage or disposal.
Pesticide storage
Store in original container away from feed and food.  Store in cool, dry area.  Do not store in direct sunlight. Do
not allow prolonged storage in temperatures that exceed 105 F° (40 C°) or in temperatures that fall below
14 F° (-10 C°).
Pesticide disposal
To avoid wastes, use all material in this container by application according to label directions.  If wastes cannot
be avoided, offer remaining product to a waste facility or pesticide disposal program (often such programs are
run by state or local governments or by industry).
Container handling
Rigid, Non-refillable containers (equal to or less than 5 gallons)
Non-refillable container. Do not reuse or refill this container. Triple rinse or pressure rinse container (or equivalent)
promptly after emptying. Triple rinse as follows:  Empty the remaining contents into application equipment or a
(continued)

11
130 mm
145 mm
mix tank and drain for 10 seconds after the flow begins to drip. Fill the container 1/4 full with water and recap.
Shake for 10 seconds. Pour rinsate into application equipment or a mix tank or store rinsate for later use or
disposal. Drain for 10 seconds after the flow begins to drip. Repeat this procedure two more times.
Pressure rinse as follows: Empty the remaining contents into application equipment or a mix tank and continue
to drain for 10 seconds after the flow begins to drip. Hold container upside down over application equipment or
mix tank or collect rinsate for later use or disposal. Insert pressure rinsing nozzle in the side of the container, and
rinse at about 40 PSI for at least 30 seconds. Drain for 10 seconds after the flow begins to drip.
Once container is rinsed, offer for recycling if available or puncture and dispose of in a sanitary landfill or by
incineration.
Baythroid, Bronate, Buctril, Huskie, Olympus and Stratego are registered trademarks of Bayer.
Affinity TM, Affinity BroadSpec, Express, Harmony Extra XP, and Harmony are registered trademarks of E.I.
DuPont de Nemours Company.
Topsin is a registered trademark of Cerexagri, Inc.
Curtail M is a registered trademark of Dow AgroSciences LLC. Starane, Starane NXT, Starane Ultra, Starane
Flex and Widematch are trademarks of Dow AgroSciences LLC.
Tilt, Warrior, Quadris, and Quilt are registered trademarks of Syngenta Crop Protection, Inc.
Mustang Max and Sentrallas are registered trademarks of FMC, Inc.
Headline is a registered trademark of BASF Corporation.

150 mm
145 mm
THIENCARBAZONE-METHYL GROUP 2 HERBICIDE
US81708754E            181005E  05/19
Varro® Herbicide
For: Post-emergence control of certain grasses and
broadleaf weeds in winter wheat and spring wheat
(including durum)
ACTIVE INGREDIENT:
Thiencarbazone-methyl (Methyl 4-[[[(4,5-
 dihydro-3-methoxy-4-methyl-5-oxo-1H-1,2,4-
 triazol-1-yl)carbonyl]amino]sulfonyl]-5-methyl-3-
 thiophenecarboxylate)  ......................... 1.00%
OTHER INGREDIENTS: ....................... 99.00%
Contains Petroleum Distillates TOTAL:  100.00%
Contains 0.083 pounds thiencarbazone–methyl per U.S. gallon
EPA Reg. No. 264-1062 EPA Est. No. 264-DEU-001
KEEP OUT OF REACH
OF CHILDREN
CAUTION
For MEDICAL and TRANSPORTATION Emergencies ONLY
Call 24 Hours a Day 1-800-334-7577
For PRODUCT USE Information Call 1-866-99BAYER
(1-866-992-2937)
Please refer to booklet for additional precautionary
statements and directions for use.
FIRST AID
If Swallowed: • Immediately call a poison control center or
doctor for treatment advice.
• Do not induce vomiting unless told to do so by a
poison control center or doctor.
• Do not give any liquid to the person.
• Do not give anything by mouth to an
unconscious person.
If Inhaled: • Move person to fresh air.
• If person is not breathing, call 911 or an
ambulance, then give artificial respiration,
preferably by mouth-to-mouth, if possible.
• Call a poison control center or doctor for further
treatment advice.
If on Skin or
Clothing:
• Take off contaminated clothing.
• Rinse skin immediately with plenty of water for
15-20 minutes.
• Call a poison control center or doctor for
treatment advice.
If in Eyes: • Hold eye open and rinse slowly and gently with
water for 15-20 minutes.
• Remove contact lenses, if present, after the first
5 minutes, then continue rinsing.
• Call a poison control center or doctor for
treatment advice.
In case of emergency, call the toll-free Bayer CropScience
Emergency Response telephone number: 1-800-334-7577.
Have a product container or label with you when calling a
poison control center or doctor, or going for treatment.
Note to Physician: May pose an aspiration pneumonia hazard.
Contains petroleum distillate. No specific antidote is available. All
treatments should be based on observed signs and symptoms of
distress in the patient. Overexposure to materials other than this
product may have occurred.
PRECAUTIONARY STATEMENTS
HAZARDS TO HUMANS AND DOMESTIC ANIMALS
CAUTION
• Harmful if swallowed, inhaled or absorbed through the skin.
• Causes moderate eye irritation.
• Avoid breathing vapors, or spray mist.
• Avoid contact with skin, clothing or eyes.
STORAGE AND DISPOSAL
Do not contaminate water, food, or feed by storage or disposal.
Pesticide storage
Store in original container away from feed and food.  Store in
cool, dry area.  Do not store in direct sunlight.  Do not allow
prolonged storage in temperatures that exceed 105 F° (40 C°) or
in temperatures that fall below 14 F° (-10 C°).
Pesticide disposal
To avoid wastes, use all material in this container by application
according to label directions.  If wastes cannot be avoided, offer
remaining product to a waste facility or pesticide disposal program
(often such programs are run by state or local governments or by
industry).
Container handling
Rigid, Non-refillable containers (equal to or less than 5
gallons)
Non-refillable container. Do not reuse or refill this container.Triple
rinse or pressure rinse container (or equivalent) promptly after
emptying. Triple rinse as follows:  Empty the remaining contents
into application equipment or a mix tank and drain for 10 seconds
after the flow begins to drip. Fill the container 1/4 full with water
and recap. Shake for 10 seconds. Pour rinsate into application
equipment or a mix tank or store rinsate for later use or disposal.
Drain for 10 seconds after the flow begins to drip. Repeat this
procedure two more times.
Pressure rinse as follows: Empty the remaining contents into
application equipment or a mix tank and continue to drain for 10
seconds after the flow begins to drip. Hold container upside down
over application equipment or mix tank or collect rinsate for later
use or disposal. Insert pressure rinsing nozzle in the side of the
container, and rinse at about 40 PSI for at least 30 seconds. Drain
for 10 seconds after the flow begins to drip.
Once container is rinsed, offer for recycling if available or puncture
and dispose of in a sanitary landfill or by incineration.
Bayer CropScience LP
800 N. Lindbergh Blvd.
St. Louis, MO 63167
Varro is a registered trademark of Bayer.
©2019 Bayer CropScience
NET CONTENTS: 2.14 Gallons