Abstract
Fallow Weed Control with Preemergence Applications of Clarity, Atrazine, Spartan Guard, Sharpen, Zidua, and Corvus
Highlights
Late February to very early March preemergence treatments with dicamba have become standard practice in this region for kochia control
The best kochia control at 13 weeks after spring application (WAST) occurred with spring applications containing Clarity
Clarity plus Atrazine, Sharpen, Zidua, Spartan Guard, or Corvus applied in the spring provided as much as 90% kochia control at 20 WAST
Summary
Kochia control at 8 weeks after spring application (WAST) was greatest when Clarity (dicamba) was included in the spring applications or when Corvus (isoxaflutole + thiencarbazone) was applied with atrazine and Clarity in the fall. The best kochia control at 13 WAST occurred with spring applications containing Clarity. Clarity plus Atrazine, Sharpen, Zidua, Spartan Guard, or Corvus applied in the spring provided as much as 90% kochia control at 20 WAST. The spring application of Spartan Guard and Clarity controlled Russian thistle 90% at 20 WAST
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