Farmers are reporting leaf cupping on a large number of soybean acres across the Northern Plains. During University of Minnesota Extension’s Field Notes Friday webinar, crops agronomist Jared Goplen says there are any number of stressors that could cause leaf cupping. “Environmental, insect and disease stressors. Herbicide carryover is also something we’ve talked about on some fields with farmers using products they normally wouldn’t,” says Goplen. “Then, spray tank cleanouts and also, herbicide drift.” Extension agronomist Tom Peters doesn’t think the cupping is caused by drift, tank contamination or carryover. “That’s because of how uniform it is across the field. If it’s tank contamination, you’d see a pattern from load to load and I’m not seeing that. When we see drift happening in fields, there’s a feathering affect. I’m not seeing particle movement either.”
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