By admin       2018-07-27

In July, many Mississippi cotton growers were contending with high bollworm egg lays from flights of moths coming out of corn into cotton fields, says Dr. Angus Catchot, Mississippi State University Extension professor of entomology and plant pathology. “We’ve been in a bollworm flight, depending on where you are in the state, since July 3, and it shows no sign of letting up,” he said at the recent joint meeting of the Mississippi Boll Weevil Management Corporation and the Mississippi Farm Bureau Federation Cotton Policy Committee. ”I’ve had a lot of calls this morning [July 19] from producers in the south Delta area, reporting 40 percent to 50 percent egg lays. This is the second round for those folks. It’s rolling north and east, and it’s been heavy and it’s been consistent for a while. “There’s some correlation to your proximity to corn as to whether or not you’re having these big flights. There’s no question now that we’re seeing many more bollworms survive Bt corn than we ever have before, and that’s what’s been contributing to these big flights the last couple of years. In our part of the world, all the bollworms we have in June funnel through corn, and because the Bt toxins in corn aren’t working well any more, and they’re very similar to the Bt toxins in cotton, it’s exacerbating the size of the populations that come out of corn. "I talked yesterday [July 18] with my colleague in Arkansas, Gus Lorenz, after he'd returned from a trip to southeast Arkansas cotton fields. 'It's absolutely unbelievable,' he said. 'In my 40-something years in this business, I've never seen egg lays like this.

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