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Oklahoma State University Stillwater, OK |
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Oklahoma Alfalfa |
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Oklahoma State University Stillwater, OK |
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Oklahoma Alfalfa |
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Postemergence Summer Weed Control |
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Butyrac® 200 (2,4-DB) is a nonresidual herbicide that can give good control of small emerged pigweed (less than 4 inches tall). Control of some other summer broadleaf weeds is only fair, so read the label for listing of susceptible broadleaf weeds. Poast Plus® should be applied between cuttings when the alfalfa regrowth is about 6 inches tall and there is enough emerged weedy grasses to merit control (1 to 2/sq. ft.). The first application for both Butyrac®
200 and Poast Plus® is normally made after the second cutting
in mid-June, but could be after first cutting if first cutting is delayed
to late May or early June. Since both of these herbicides have no residual,
it will be necessary to scout the field for new emerged weeds after each
harvest and respray if season-long weed control is desired.
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| Jim Stritzke Former Alfalfa Weed Control Specialist Department of Plant and Soil Sciences Oklahoma State University |
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