New weevil gnawing at Arkansas soybeans
The brown stinkbugs are not a new problem for Arkansas, but this is the first time producers have seen this many this early in the season.
“When they start feeding on seedling corn, they can kill it or severely stunt it,” Lorenz said, adding that the feeding pattern is also very distinct.
“What you get is this progression. They’ll start on one plant in the row, kill it, then move on to the next one and severely stunt it,” he said. “Then they’ll start on the next one and the damage will be pretty bad, then the next one moderately bad.”
Corn that survives will see its ears targeted, sometimes damaged in such a way that the ears will curve, like cow horns.
The producers began seeing problems in corn last year, Lorenz said. “In some areas, the producer cut 170 bushels per acre, and in some spots, zero.”
By the time the ears appear, the farmer may have had to make three or four insecticide applications for stinkbugs.
“You go across or down the road into where the farmer didn’t use the field peas as a cover crop and there’s no damage,” Lorenz said. “Cover crops have advantages, but these producers are paying a big price.”
For more information about entomology or crop production, visit www.uaex.edu or contact your county Extension office.
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