Abstract

Roundup Ready soybeans were planted no-till with a drill on May 4. Immediately prior to planting the area was treated with 1 qt Roundup Ultra to control winter annuals and emerged annual weeds. Preemergence herbicide treatments were applied on May 5. Early postemergence treatments were applied on June 5 when foxtail was 4”, common sunflower was 8” and soybeans were at V2 stage. Postemergence treatments were applied on June 16 when foxtail was 6-12”, sunflower was 8-16” and soybeans were at the V4 stage. Plot size was 10’ by 30’ and all treatments were replicated three times. Herbicides were applied with a backpack sprayer in 20 gallons of water per acre at 40 PSI. Weed control was evaluated on July 6.

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