Oklahoma State University Stillwater, OK | |
Oklahoma Alfalfa |
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Summer Weed Control with Pursuit® and Sinbar® Pursuit® applied after 1st or 2nd harvest can be very effective on broadleaf weeds. At 4 oz/A, small pigweeds and some other broadleaf weeds are usually controlled. However, it may only suppress some of the grasses at this rate. In our trials, we have had excellent season-long control of pigweeds with 4 oz/A applied after first harvest. However, grass control has been erratic. Producers should apply Pursuit® at 4 oz/A on small emerged weeds (less than 3 inches tall) after the first or second harvest when alfalfa regrowth is about 6 inches tall. Pursuit® has both postemergence and residual activity, so you can expect summer-long weed control of susceptible weeds. Also, be aware of rotational crop guidelines after using Pursuit®. It is 4 months for wheat and 18 months for sorghum (see label for other crops). Sinbar® applied after 1st harvest gives fair
to good control of pigweeds, but only fair control of summer grasses. For best
result, it needs to be applied immediately after first harvest and receive within 1 week
an inch of rain to incorporate it. |
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Jim Stritzke Former Alfalfa Weed Control Specialist Department of Plant and Soil Sciences Oklahoma State University |