How did resistant pigweeds progress across Clay County?

“They seemed to move in from the east,” says Vangilder. “But this area may have developed our own resistant pigweeds. I don’t think that’s unusual.

“I think part of the problem is we sprayed too many pigweeds when they were too big. We were able to kill larger pigweed plants for a long time and so we just kept doing the same thing without rotating chemistries.”

Vangilder also saw some big plants “that appeared to have been damaged from the wheels. That happened when the wheel ran over it while spraying. It seemed like a lot of those survived and didn’t get good coverage.”

Pigweed fatigue can set in, admits Vangilder.

“Some farmers have done well all summer in dealing with pigweeds. But, right now, there are a few pigweeds in the field or on the edges that have come up. Those wouldn’t be hard to get but some aren’t doing it. I wish they would.

“Someone told me ‘I’ve fought those weeds all summer. I’m tired, now.’

“Well, you can’t quit. If you leave three or four and the seed scatter with the picker you’re back to square one. Whatever you gained in that summer fight can easily be lost.”

When a combine hits a pigweed, “it’ll show up in the field – right down the row – the next year. If you don’t have a residual down, you’ll see the line where that (parent) pigweed was picked up and seed scattered down the row.”