Because so many farmers are having difficulty controlling Italian (annual) ryegrass in wheat with Hoelon (diclofop-ethyl) interest in using Sencor (metribuzin) for control of annual ryegrass is increasing.

Control of both annual ryegrass and wild radish can be good with metribuzin, depending on weed size and environmental conditions. Ideal conditions are warm (not hot) periods with adequate soil moisture for optimum wheat and weed growth. Maximum weed control with minimum crop injury will occur when rainfall after application is sufficient to activate the herbicide, but not heavy enough to excessively leach the herbicide into the wheat root zone.

The following guidelines should be followed when using metribuzin for weed control in winter wheat and barley:

• Read and follow all label directions,
• Some wheat and barley varieties are sensitive to metribuzin (see label and list below),
Metribuzin Sensitivity Table

• Crop tolerance depends on rate and environmental conditions,

• Sencor rate depends on wheat stage and soil type (see label),
• For most Georgia soils (medium texture with < 2% om) apply to 4-leaf wheat as follows:

1ai=active ingredient