CORN - WEEDS AT 6-18 INCHES MAXIMUM HEIGHT OR DIAMETER
STOUT herbicide is used at the rate of 1/2 - 3/4 ounce per acre for selective postemergence grass and broadleaf weed control in field corn.
Do not apply to field corn grown for seed, to popcorn or to sweet corn.
Do not make more than one application of STOUT per cropping season.
Do not apply aerially in California or New York State.
CORN HYBRID INFORMATION
Apply STOUT to field corn hybrids with a relative maturity (RM) rating of 77 days or more, including \"food grade\" (yellow dent, hard endosperm), waxy and oil corn. Not all field corn hybrids of less than 77 days RM, not all white corn hybrids nor Hi-Lysine hybrids have been tested for crop safety, nor does DuPont have access to all seed company data.
Consequently, injury arising from the use of STOUT on these types of corn is the responsibility of the user. Consult with your seed supplier before applying STOUT to any of these corn types. Seed company publications indicate “Warning”, “Crop Response Warning”, or “Sensitive” notations for the use of some ALS herbicides on corn hybrids of 77 CRM or higher. As noted in the seed company publications, DuPont sulfonylurea herbicides such as STOUT should be used with caution on these hybrids.
Consult with your local DuPont representative or the DuPont Label Web Site (http://cropprotection.dupont.com/) for any additional supplemental labeling information relative to potential corn hybrid sensitivity to STOUT.
WHEN TO APPLY
TIMING TO CROP STAGE
STOUT may be applied to corn that is up to 16\" tall and is exhibiting up to and including 5 leaf collars. Do not apply to corn taller than 16\" or exhibiting more than 5 leaf collars. Some State and corn hybrid restrictions apply (see below). Not all STOUT tank mixtures may be applied to corn that is less than 4” or greater than 12” tall. Consult TANK MIX APPLICATIONS for more information.
STOUT may be used to control emerged weeds in fields prior to planting field corn. Preplant and preemergence applications will burndown emerged weeds but will not provide residual control.
While STOUT has a wide application window, research has shown best results are obtained when applications are made early postemergence when corn and weeds are small. Target applications to corn that is less than 12” tall for best overall performance.
Limit STOUT applications to corn that is up to 12” tall, up to and including 5 leaf collars, whichever is most restrictive, in the states of KS, OK and TX.
TIMING TO WEEDS
Apply STOUT when grasses are young and actively growing, but before they exceed the sizes listed on the label.
- Applications made to weeds at growth stages greater than those listed below may result in incomplete control.
Grass competition due to incomplete control may reduce yields.
A timely cultivation may be necessary to control suppressed weeds, or weeds that emerge after an application of STOUT in the absence of an activating rainfall.
Optimum timing for cultivation is 7–14 days after STOUT application or upon seeing the establishment of new weeds.
ENVIRONMENTAL CONDITIONS AND BIOLOGICAL ACTIVITY
STOUT provides best results when applied to young, actively growing weeds. Applications made during warm, moist conditions (70°F or more) and adequate soil moisture both before and after application maximizes performance.
The degree and duration of control depend on spray coverage, weed spectrum, weed size, growing conditions before and after treatment, soil moisture, and adjuvant selection.
STOUT is rainfast in 4 hours. Treating weeds that exceed maximum label height or that are under stress may result in incomplete control. Poor weed control or crop injury may result from applications made to plants under stress from:
- abnormally hot or cold weather
- environmental conditions such as drought, water-saturated soils, hail damage, or frost
- disease, insect, or nematode injury
- prior herbicide, or carryover from a previous year’s herbicide application
Stress from conditions immediately following application may also result in crop injury or poor weed control. Stress affects all weeds, but especially weeds such as woolly cupgrass, green and yellow foxtail, and wild proso millet.
If the corn or grass weeds are under stress, delay application until stress passes and both weeds and corn resume active growth.
Apply STOUT when minimum nighttime temperatures are above 40°F and the maximum daytime temperatures are below 92°F to maximize performance and minimize the potential for crop injury.
Applications made during or immediately following periods of large day/night temperature fluctuations or where daytime temperatures do not exceed 50°F may decrease weed control and increase the potential for crop injury.
STOUT rapidly inhibits the growth of susceptible weeds, reducing weed competition within as little as 6 hours after application. Susceptible plants are controlled in 7–21 days.
Ground application of STOUT to dry, dusty fields may reduce weed control in wheel track areas.
SOIL INSECTICIDE INTERACTION INFORMATION
Before using STOUT, ensure that it is compatible with any other insecticides previously applied to the corn crop.
STOUT may interact with certain insecticides previously applied to the crop. Crop response varies with field corn type, insecticide used, insecticide application method, and soil type.
STOUT may be applied to corn previously treated with “Fortress”, “Aztec”, or “Force” insecticides or nonorganophosphate (OP) soil insecticides regardless of soil type.
- DO NOT APPLY STOUT to corn previously treated with “Counter” 15G or to corn treated with “Counter” 20CR infurrow or over the row at cultivation.
- Applications of STOUT to corn previously treated with “Counter” 20 CR, “Lorsban”, or “Thimet” may cause unacceptable crop injury, especially on soils of less than 4% organic matter.
Many crops are highly sensitive to STOUT. All direct or indirect contact (such as spray drift) with crops other than field corn should be avoided (see also SPRAY DRIFT MANAGEMENT).
For all application systems, use 50-mesh or larger strainer screens.
Do not apply STOUT through any type of irrigation system.
Use a minimum of 15 gallons of water per acre (GPA) to ensure thorough coverage of the weeds and the best performance. Use a minimum of 10 GPA for light, scattered stands of weeds.
For best performance, select nozzles and pressure that deliver MEDIUM spray droplets, as indicated, for example, by ASAE Standard S572. Nozzles that deliver COARSE spray droplets may be used to reduce drift, provided spray volume is increased to maintain coverage on small weeds.
For optimal product performance and minimal spray drift, adjust the spray boom to the lowest possible spray height specified in manufacturers’ specifications.
Ensure that equipment is set up to avoid applying an excessive rate directly over the rows and into the corn plant whorl. Overlaps or starting, stopping, slowing, and turning while spraying may result in crop injury.
For band applications, use proportionately less spray mixture. To avoid crop injury, carefully calibrate the band applicator to not exceed the labeled rate. Carefully follow the manufacturer’s instructions for nozzle type (flat fans), orientation, distance of nozzles from the crop and weeds, spray volumes, calibration and spray pressure.
Aerial application is not permitted in the States of New York and California.
Use nozzle types and arrangements that will provide optimum spray distribution and maximum coverage at a minimum of 3 GPA.
Do not apply during a temperature inversion, when winds are gusty, or when conditions favor poor coverage and/or off-target spray movement.
INTEGRATED PEST MANAGEMENT
This product may be used as part of an Integrated Pest Management (IPM) program that can include biological, cultural, and genetic practices aimed at preventing economic pest damage. IPM principles and practices include field scouting or other detection methods, correct target pest identification, population monitoring, and treating when target pest populations reach locally determined action thresholds. Consult your state cooperative extension service, professional consultants or other qualified authorities to determine appropriate action treatment threshold levels for treating specific pest/crop systems in your area.
When herbicides that affect the same biological site of action are used repeatedly over several years to control the same weed species in the same field, naturally-occurring resistant biotypes may survive a correctly applied herbicide treatment, propagate, and become dominant in that field.
Adequate control of these resistant weed biotypes cannot be expected. If weed control is unsatisfactory, it may be necessary to retreat the problem area using a product affecting a different site of action.
To better manage herbicide resistance through delaying the proliferation and possible dominance of herbicide resistant weed biotypes, it may be necessary to change cultural practices within and between crop seasons such as using a combination of tillage, retreatment, tank-mix partners and/or sequential herbicide applications that have a different site of action. Weed escapes that are allowed to go to seed will promote the spread of resistant biotypes.
It is advisable to keep accurate records of pesticides applied to individual fields to help obtain information on the spread and dispersal of resistant biotypes. Consult your agricultural dealer, consultant, applicator, and/or appropriate state agricultural extension service representative for specific alternative cultural practices or herbicide recommendations available in your area.
RESTRICTIONS AND PRECAUTIONS
Injury to or loss of desirable vegetation may result from failure to observe the following:
- Do not apply DuPont STOUT or drain or flush application equipment on or near desirable trees or other plants, or on areas where their roots extend, or in locations where the chemical may be washed or moved into contact with their roots.
- Do not use on lawns, walks, driveways, tennis courts, or similar areas.
- Prevent drift of spray to desirable plants.
- Do not contaminate any body of water.
- Thoroughly clean application equipment immediately after use. (See the Sprayer Cleanup section of the label for instructions.)
- Do not graze or feed forage, hay, or straw from treated areas to livestock within 30 days of STOUT application.
Refer in the label regarding tank mix information.
As weeds mature, their sensitivity to STOUT decreases. Grassy weeds growing under stress due to drought or other environmental factors may become mature (more than 3 tillers) before they reach the size listed, in which case their susceptibility to STOUT may be reduced.