Source: Brad Haire, FARM PROGRESS, 4/20/20


Southeast cotton growers face extreme economic pressure due to drastic reductions in global cotton sales and prices inflamed by the COVID-19 pandemic, but over the last decade they have made great strides against pigweed resistant to glyphosate. They'll need to take what they learned from that fight to curb pigweed now resistant to PPO herbicides. For example, Palmer amaranth, or pigweed, populations resistant to Protoporphyrinogen oxidase herbicides, are confirmed in Georgia now, said Stanley Culpepper, University of Georgia Extension weed specialist. PPO-resistant pigweed has been documented in the Mid-South and the Carolinas, too.

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