Reports of worms appearing in some raspberries in Oregon's Willamette Valley could be the larvae of the spotted wing drosophila or another fruit fly, industry experts say.

Henry Bierlink, executive director of the Washington Red Raspberry Commission, said to the untrained eye, the larvae could be mistaken for worms.

"SWD is an ongoing challenge to anyone not spraying like crazy," he said. "Once the heat units reach a certain point, they're there. When we see them pop up in occasional trap, we start our protection."

Drosophila can show up in any soft fruit, which includes all the caneberries, he said.

Vaughn Walton, associate professor of horticulture at Oregon State University, said the observed "worms" could also be another species of fruit fly -- D. melanogaster -- that is attracted to overripe fruit.

-- Steve Brown

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