WHEAT AND BARLEY

General Information

GENERAL INFORMATION

Pulsar Herbicide is a postemergence, systemic herbicide for the control of broadleaf weeds in all varieties of spring wheat (including durum), winter wheat, and barley.

The active ingredients in Pulsar Herbicide are readily absorbed by leaves and stems and translocate systemically in target weeds, accumulating in areas of active growth. Pulsar Herbicide controls weeds by interfering with the plant’s growth hormones (auxins) causing the disruption of normal plant growth patterns. Symptoms include twisting and curling of stems (epinasty), swollen nodes and leaf cupping followed by chlorosis (yellowing), growth inhibition and eventual plant death. Level and rate of control depend on weed species, growing conditions, crop competition, and coverage. Thorough spray coverage of target weeds is essential for consistent control.

General Precautions

- Do not apply on or near desirable trees or plants or in locations where chemical may be washed into contact with their roots.

- Do not apply adjacent to sensitive crops when the temperature on the day of application is expected to exceed 85°F as drift is more likely to occur.

- Do not spray if conditions of thermal inversion exist, or if wind direction and speed may cause spray to drift onto adjacent nontarget areas. Drift minimization is the responsibility of the applicator.

- Consult with local and State agricultural authorities for information on avoiding or minimizing spray drift.

- Avoid overlapping spray swath as crop injury may occur.

- Do not apply when wind velocity exceeds 15 mph.

- To avoid subsequent injury to other crops, thoroughly clean application equipment immediately after spraying. Ensure that all traces of the product are removed. See section on cleaning spray equipment.

- Do not use if wheat or barley is underseeded with a legume.

Management of Resistant Weeds

Pulsar Herbicide contains Group 4 (synthetic auxins) herbicides. Some naturally occurring weed populations have been identified as resistant to Group 4 herbicides. Selection of resistant biotypes, through repeated use of these herbicides in the same field, may result in control failures. A resistant biotype may be present if poor performance cannot be attributed to adverse weather conditions or improper application methods. If resistance is suspected, contact your local Syngenta representative for assistance.

The following practices will delay selection for resistant populations of weeds:

Apply postemergence herbicides to small, actively growing weeds.

Ensure that good spray coverage is achieved with proper spray volumes and calibrated equipment.

Use the full label rate of product.

Avoid tank mixes that may cause antagonism and reduced weed control.

Where possible, avoid the repeated use of herbicides with the same mode of action (i.e., same group number) in successive seasons either in cereal crops or rotational crops.

Use a diverse crop/fallow rotation to extend the range of available herbicides and agronomic practices.

Use cultivation, fertilizer regimens, seeding rates and row widths that enhance crop competitiveness.

Prevent weed escapes from producing seed either in the crop or during fallow periods.

APPLICATION PROCEDURES

Timing of Application

Crop

Application Timing

Barley, fall seeded: Prior to barley jointing stage

Barley, spring seeded: Before barley exceeds the 4-leaf stage

Wheat, fall seeded: Prior to wheat jointing stage

Wheat, spring seeded: Before wheat exceeds the 6-leaf stage

- Spring-seeded barley varieties that are seeded during the winter months or later, follow the application timing given for spring-seeded barley.

- Early developing wheat varieties such as TAM 107, Madison and Wakefield must receive application

between early tillering and prior to the jointing stage.

Precaution: Do not apply to a crop that is stressed by conditions such as frost, low fertility, drought, flooding, disease damage, or insect damage as crop injury may result.

For optimum results, apply Pulsar Herbicide to actively growing weeds. An early application will maximize crop yields by reducing weed competition. Weed control following application of Pulsar alone or in combination with other herbicides can be reduced or delayed under conditions of stress such as drought, heat, insufficient fertility, flooding, and prolonged cool temperatures. Optimum weed control will be obtained if application of Pulsar Herbicide is delayed until the conditions of stress have ended and weeds are once again actively growing. Weeds emerging after Pulsar Herbicide application will not be controlled.

Rainfastness

Rain or irrigation occurring within 4 hours after application may reduce the efficacy of Pulsar Herbicide.

GROUND AND AERIAL APPLICATION PROCEDURES

For best accuracy, calibrate the sprayer before use.

Ground Applications

Water Volume - Use a minimum of 8 gallons of water per acre.

Spray Nozzles - 80° or 110° flat fan nozzles are recommended for optimum spray coverage. Nozzles must be uniformly spaced along the boom to provide accurate and uniform coverage. Point the nozzles forward in the direction of travel at an angle of 45° for optimum coverage of weeds. Follow the nozzle manufacturer’s recommendations for pressure and screens. Do not use flood or hollow cone type nozzles.

Screens - Use a screen or strainer with 16-mesh or coarser on the suction side of the pump. Do not place a screen in the recirculation line unless using a roller or piston pump. Use 50-mesh or coarser screens between the pump and boom and at the nozzles.

Pressure - 35-40 psi at the nozzles. Lower pressure may be used with extended range or low pressure nozzles.

Good weed coverage with the spray mixture is essential for optimum weed control results. Observe sprayer nozzles frequently during the spraying operation to ensure that the spray pattern is uniform. Avoid large spray overlaps which result in excessive rates in the overlap areas. Also, avoid application under conditions when uniform coverage cannot be obtained or when excessive spray drift may occur. To reduce spray drift, do not apply under windy conditions. Allow adequate distance between target area and desirable vegetation to prevent drift to non-target areas. Boom height for broadcast over-the-top application should be based upon the free-standing height of the crop, not height above the soil surface, and should be at least 12 inches above the crop.

Aerial Applications

Apply Pulsar Herbicide in water using a minimum spray volume of 3 gals./A. Avoid application under conditions where uniform coverage cannot be obtained or where excessive spray drift may occur. Make applications at a maximum height of 10 ft. above the crop with low-drift nozzles at a maximum

pressure of 40 psi and wind speed not exceeding 10 mph to help assure accurate application within the target area.

RESTRICTIONS

- Make no more than 1 application per crop season, not to exceed more than 12.5 ozs. of Pulsar Herbicide per acre per year.

- Do not allow livestock to graze treated areas or harvest treated forage within 7 days of application.

- Do not apply closer than 14 days before cutting of hay or 40 days before harvesting of grain or straw.

Refer in the label regarding tank mix information.

Limitations, Restrictions, and Exceptions

- Use the higher end of the rate range when weed populations are dense and/or when weeds are at the maximum application timing.

Restricted Entry Interval

24 hours