Aug 25, 2011
More resistant fungus worries apple growers

Apple growers in Delaware and across the eastern U.S. have a despised enemy known as apple scab — a disease caused by a fungus that forms ugly brown or greenish-black pockmarks on the fruit’s skin. Growers have kept the disease under control for decades with fungicides. Now, researchers say chemicals may be losing their effectiveness.

"We’ve dealt with fungicide resistance over the years, but this time we’re losing three or four different classes of completely unrelated fungicides at the same time," said Henry Ngugi, a plant pathologist with Penn State Fruit Research and Extension Center. "We have to literally go back to the drawing board." The News Journal

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