General Information

General Information

Weedmaster herbicide is a selective postemergence herbicide for controlling a wide spectrum of annual, biennial, and perennia broadleaf weeds and brush in grass forages and selected row crops.

Mode of Action

Weedmaster contains two active ingredients: dicamba and 2,4-D. Weedmaster is readily absorbed by plants through shoot and root uptake, translocates throughout the plant's system, and accumulates in areas of active growth. Weedmaster interferes with the plant's growth hormones (auxins) resulting in death of many broadleaf weeds.

Application Instructions

Apply Weedmaster at the rates and growth stages listed in Table 1 and Table 2 as follows unless instructed differently by Food/Feed Crop-specific Informations or Nonfood/Feed Use-specific Information. Applications can be made to actively growing weeds as aerial, broadcast, band, or spot spray applications. Weedmaster may be applied using water or sprayable fluid fertilizer as a carrier. Sprayable fluid fertilizer may be used as the carrier in preplant or preemergence uses for all crops listed on the label. Postemergence uses with sprayable fluid fertilizer may be made on pasture, hayland, or wheat crops only.

The most effective application rate and timing varies based on the target weeds species (refer to Table 1 and Table 2). In mixed populations of weeds, thte correct rate is determined by the weed species requiring the highest rate.

Delaying application permits weeds to exceed the maximum size stated and will prevent adequate control.

All aerial and ground application eqduipment must be properly maintained and calibrated using appropriate carriers or surrogates.

Susceptible Plants

DO NOT apply under circumstances where spray drift may occur to food, forage, or other plantings that might be damaged or crops thereof rendered unfit for sale, use or consumption. Susceptible crops include, but are not limited to, cotton, okra, flowers, grapes (in growing stage), fruit trees (foliage), soybeans (vegetative stage), ornamentals, sunflowers, tomatoes, beans, and other vegetables, or tobacco. Small amounts of spray drift that might not be visible may injur susceptible broadleaf plants.

Limitations, Restrictions, and Exceptions

Refer to application rates and timing tables on the label for its specific instruction.

Weedmaster is recommended for use for pasture (including pasture grown for hay), rangeland and grass grown for hay or silage.

Some weed species will require tank mixes for adequate control.

Rates above 4 pints of Weedmaster per acre are for spot treatments only.

Retreatments may be made as needed; however, do not exceed a total of 8 pints of Weedmaster per treated acre during a growing season.

Uses described in this section also pertain to small grains (such as barley, corn, forage sorghum, oats, rye, sudangrass, or wheat) grown for pasture, hay, and silage only. Newly seeded areas,including small grains grown for pasture or hay, may be injured if rates of Weedmaster greater than 2 pints per acre are applied.

In newly established hybrid Bermudagrass, Pangolagrass, and stargrasses (Cynodon spp.), use 2-4 pints of Weedmaster per acre to control or suppress weeds after planting vegetative propagules (stolons) of hybrid bermudagrasses. In addition to the weeds listed in Tables 1 and 2 of the label, this rate of Weedmaster will control or suppress annual sedges, broadleaf signalgrass, crabgrass, and goosegrass.

Best results will be obtained if Weedmaster is applied at the germinating stage of weeds. Under favorable conditions, this is usually 7-10 days after planting these grasses. Reduced control can be expected if weeds are allowed to reach 1\" in height before application or if germination of weeds occurs 10 days after application.

Do not use on bentgrass, susceptible grass pastures (such as carpetgrass, buffalograss, or St. Augustine grass), lespedeza, wild winter peas, vetch, clover, and alfalfa pastures as injury will occur.

When perennial weeds are reaching maturity, mowing and allowing some regrowth will enhance control. Difficult to control weeds and brush may require repeat applications.

For pasture renovations, wait 3 weeks per quart (2 pints) of Weedmaster used per acre before interseeding or injury may occur.

If grasses are grown for seed or for seed-down purposes, do not apply after grass reaches the joint stage.

Grazing and Feeding Non-lactating Animals:

There is no waiting period between treatment and grazing for non-lactating animals. Do not permit meat animals being finished for slaughter to graze treated fields within 30 days of slaughter.

Grazing and Feeding Lactating Animals: Do not graze lactating dairy animals within 7 days of treatment.

Dry hay and Silage: Treated grasses may be harvested for dry hay or silage but do not harvest within 37 days of treatment.

Restricted Entry Interval

48 hours