Maine Organic Farmers and Gardeners Association
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Rapid Apple Decline

An apple tree showing signs of stress – possibly Rapid Apple Decline.

An apple tree showing signs of stress – possibly Rapid Apple Decline.

October 31, 2019

Have some of your apple trees mysteriously and rather rapidly died? C.J. Walke, MOFGA’s organic orchard educator, says that researchers at the Pennsylvania Department of Agriculture have named this phenomenon Rapid Apple Decline (RAD), or Sudden Apple Decline (SAD), and an explanation has yet to be found. Symptoms resemble characteristics of stress, in which leaves begin to look pale yellow, then reddish, which often indicates girdling, and then curl up and eventually die. Whole limbs or whole trees can be affected. Read more in Walke’s article “Rapid Apple Decline” in the fall issue of The Maine Organic Farmer & Gardener.

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