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Varro

Varrofield Clean

With outstanding control of wild oats and other problematic grass weeds, Varro^® herbicide provides you with a clean wheat field you can be proud of. A powerful early-weed removal specialist, Group-2 Varro offers effective resistance management and exceptional value to help ensure the profitability of your farm.

Varro Advantage

Features and Benefits

Strong performance on grass weeds like wild oats, barnyard grass, Persian darnel, green and yellow foxtail, canary seed and Japanese brome
Group 2 technology allows for control of problematic Group 1-resistant wild oats and foxtail
Allows crop rotation flexibility to sensitive crops like dry beans and lentils
Enhances the overall control of its broadleaf tank-mix partners
Exceptional crop safety
Registered for ground and aerial application

Varro vs. The Competition

Varro for Wild Oat Control

Source: 5 Bayer Internal Trials.
Your results may vary according to agronomic, environmental and pest pressure variables.

Varro for Green Foxtail Control

Source: 3 Bayer Internal Trials.
Your results may vary according to agronomic, environmental and pest pressure variables.

Varro for Yellow Foxtail Control

Source: 2 Bayer Internal Trials.
Your results may vary according to agronomic, environmental and pest pressure variables.

Active Ingredients

Thiencarbazone-methyl
Group 2

Weeds Controlled

	Varro	Varro + AMS¹
Grass Weeds
Barnyard grass	E	E
Canary seed	G+	VG
Green foxtail	G	G+
Japanese brome (fall germinated)¹	S	S+
Japanese brome (spring germinated)¹	G	G
Persian darnel	S	S
Wild oats	VG	VG+
Yellow foxtail	S	S+
Broadleaf Weeds
Cleavers	G	G+
Hemp-nettle	E	E
Lady's thumb/Smartweed	G	G
Lamb's-quarters	S	S+
Redroot pigweed	G	G
Round-leaved mallow	S	S
Russian thistle	S	S
Shepherd's-purse	G	G
Stinkweed	G	G
Volunteer canola	G	G
Wild buckwheat	S	S
Wild mustard	VG	VG

Weed Control

EXCELLENT: 100–95%	VERY GOOD: 94–90%	GOOD: 89–85%	SUPPRESSION: < 84%

¹ Velocity m3/Varro + AMS for use on spring and winter wheat only. In durum wheat, add a non-ionic surfactant.

Approved Tank Mixes

Product	Wheat
Product	Durum	Spring	Winter
2,4-D Ester^{3, 4}
AMS
Attain XC¹
Barricade^® and Barricade II¹
Barricade M¹
Buctril^® M			²
Curtail M	³
Frontline™ XL
Grow TTF™¹
Infinity^®
Infinity FX
MCPA Ester		^**
Momentum™^{1, 3}
NIS (Non-Ionic Surfactant)
OcTTain™¹
Paradigm™ ¹
Pixxaro™¹
PP-2525¹
PP-23235¹
PP-31155¹
Prestige¹	³	^**
Refine^® SG
Refine SG + 2,4-D Ester
Refine SG + MCPA Ester
Retain^® SG¹
Stellar™¹
Thumper^®
Tilt^®¹
Travallas™¹

Apply mixes according to most restrictive use limitation.
¹Bayer Tank Mix Exception List.
²Exception Tank Mix control only.
³AMS adjuvant must be used when tank mixing with Prestige or Curtail M.
⁴Use AMS, followed by Varro, 2,4-D Ester and an NIS Adjuvant.
^**Use an NIS adjuvant.

Get the Max from your Tank Mix

For a complete list of off-label tank mixes supported by Bayer, please see: Tank Mix List

To learn more about how you can achieve a +10% yield increase with Varro herbicide, click here.

Labels & MSDS

Varro Fact Sheet
Varro Label
Varro MSDS
Tank Mix List

Application Tips

Rate
0.20 L/ac.

Crops/Application Timing
Apply Varro from the 1 to 6 leaf stage on the main stem up to emergence of the third tiller, but before appearance of the first node (jointing) Avoid crop injury: do not apply an ALS herbicide such as Varro following the appearance of the first node Under drought conditions: do not spray Varro herbicide if >35 days between seeding and spraying, as drought hastens crop development Do not spray within three days before or after cold temperatures (3°C or lower)

Crops/Application Timing

Apply Varro from the 1 to 6 leaf stage on the main stem up to emergence of the third tiller, but before appearance of the first node (jointing)
Avoid crop injury: do not apply an ALS herbicide such as Varro following the appearance of the first node
Under drought conditions: do not spray Varro herbicide if >35 days between seeding and spraying, as drought hastens crop development
Do not spray within three days before or after cold temperatures (3°C or lower)

Water Volumes
Ground – minimum of 5 US gal./ac. (19 L/ac.) Aerial – minimum of 3 US gal./ac. (11 L/ac.)

Rainfastness
One hour after application

Re-cropping Intervals
Safe to plant within 10 months following Varro application: alfalfa, barley, canary seed, canola, chickpeas, corn (field), dry bean, flax, lentils, mustard, oats (spring), peas (field), soybeans, sunflowers, timothy and wheat (spring, durum, and winter)

Residue and Grazing
Do not: Graze the treated crop or cut for forage hay within 7 days or cut for hay within 30 days of application Harvest wheat (spring or durum) for grain or straw within 60 days of application or winter wheat within 72 days of application Re-enter treated fields within 12 hours of application

Resistance Management

Varro provides strong performance on grass weeds including Group 1-resistant wild oats and foxtail, making it an important part of your herbicide resistance management strategy.

What is Resistance?

Resistance is a naturally occuring, inherited ability of some weed biotypes to survive a herbicide treatment that should, under normal use conditions, effectively control a weed population. Some herbicide resistant weeds have naturally developed one or more mechanisms that allow them to survive a herbicide treatment.

Types of herbicide resistance infographic.

For a weed to be considered resistant it must:

Normally be controlled by the herbicide
Survive a usually lethal dose of the herbicide
Be heritable, meaning it is passed from generation to generation

Herbicide-resistant individuals are naturally present within a weed population at very low frequencies.

Did you know that there are over 20 Group 1 herbicides on the market?

Development of Herbicide Resistance

How does resistance develop?

The image below demonstrates the interaction between a weed species and a particular mode of action and the development of herbicide resistance at different speeds. It’s clear to see that over time the use of a herbicide quickly changes from being very effective to becoming extremely ineffectual. In fact, by the fifth year of application the herbicide is failing to eliminate herbicide-resistant weeds. It is particularly alarming that there is a dramatic increase in failure rate from the fourth to fifth season.

Development of Herbicide Resistance infographic.

Treatment	% Resistant Weeds in Population	Weed Control
0 Application	.0001%	Excellent
1^st Application	.00143%	Excellent
2^nd Application	.0205%	Excellent
3^rd Application	.294%	Excellent
4^th Application	4.22%	Excellent
5^th Application	60.5%	Failure

Source: Weed Science Society of America, 2011

What can you do to delay the onset of herbicide resistance?

Don’t rely solely on herbicides for weed control
Develop field-specific long-term weed management plans
Rotate herbicide groups year over year

General guidelines for herbicide rotations:

Avoid repeated use of the same herbicide or herbicides having the same mode of action in the same field year to year
Limit the number of applications of a single herbicide or herbicides having the same site of action in a single growing season
Use mixtures or sequential treatments of herbicides having different Groups, which are active on the same target weeds whenever possible
Use non-selective herbicides pre-seed or pre-emergence to control early flushing weeds (prior to crop emergence) and/or weed escapes

Resistant Weed Management Strategies

CROP ROTATION

Rotate crops as often as possible to utilize the unique modes of action available within the crop.

TIME FERTILIZATION

Time and place fertilizer to benefit your crop, not weeds.

TARGET PROBLEM WEEDS

Systematically target problem weeds and respond quickly to changing weed populations.

SCOUT OFTEN

Scout often and take note of individual weed response to all applications (pre-emergent, post-emergent and pre-harvest).

REMOVE ALL WEEDS

Make sure you remove all weeds before they set seed – even if you have to pull by hand. Remember the old English proverb: One year seeding, seven years weeding.

PERIMETER WEED MANAGEMENT

Leaving a 1m-wide weed-free zone around your cropping fields (so new weeds can’t propagate and expand throughout your fields).

OUTCOMPETE WEEDS

Decrease your row spacing and increase seeding rates to optimize plant populations, maximize crop competitiveness and minimize time to crop canopy closure.

MAXIMIZE YOUR HERBICIDE’S EFFECTIVENESS:

Match selection of herbicide(s) with your most difficult weeds
Use full-labelled rates
Include the best tank mixes and adjuvant(s)
Use correct spray volume (follow label directions)
Use correct nozzle spacing and droplet size
Don’t spray at excess travel speeds, follow label directions
Apply during the best weather conditions (warm, humid, and sunny conditions with minimal wind)
Maximize rainfastness intervals
Time of day (herbicides are most effective when sprayed between 8:00am and 9:00pm)

Herbicide resistance is everyone's problem.This product is a Mix It Up solution.

Visit MixItUp.ca for more simple strategies and solutions.

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