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

Apply Weedmaster to sorghum in the 3-5 leaf stage (4-8\" tall). For best performance, apply Weedmaster when weeds are small (less than 3\" tall).

Applications of Weedmaster to sorghum during periods of rapid growth may result in temporary leaning of plants or rolling of leaves. These effects are usually outgrown within 10-14 days. Sorghum growing under conditions of stress such as high moisture, low fertility, and abnormal temperature may be more sensitive to applications of Weedmaster.

Do not use surfactants or oils with postemergence applications of Weedmaster on sorghum crops.

Do not use Weedmaster if the potential for sorghum injury is not acceptable.

If sorghum is grown for pasture, hay, or silage, refer to Pasture and Rangeland in section VI. Crop-Specific Information for livestock grazing and feeding restrictions.

Do not apply Weedmaster to sorghum grown for seed production.

Make no more than one postemergence application per growing season.

Pre-Harvest Interval

30 days

Restricted Entry Interval

48 hours