Expert: Fruit Fly Species Targeting Raspberry Crops Nationwide

Ryan Juntti
Updated: August 20, 2019 10:29 PM

A local expert says the moderate summer we've had this year is leading to large numbers of a specific fruit fly species.

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St. Louis County Horticulturist Bob Olen says the spotted wing Drosophila (SWD), which originated in China, is targeting raspberry crops across the nation.

Therefore, Olen recommends for anyone growing raspberries to pick daily or every other day when the fruit is very ripe.

"The best advice I can give people is pick early, pick often, pick and immediately process, freeze, refrigerate. Don't let your ripe raspberries sit on the counter for 24 hours, or you'll be in for a real surprise," said Olen.   

Olen says fruit flies will also target and lay their eggs in other fruits like apples. He says while they may be irritating to deal with, they are not harmful to your health.

If you do have fruit flies in your home, Olen says one trick to trap them is to use vinegar in a yellow container.


Ryan Juntti

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