Leaves become yellow and distorted and drop off.
Fruit and vegetables are stunted and malformed with corky brown spots and cracks. Apples , Cucumbers , Pears , Potatoes , Carrots , Parsnips , Rutabagas and Turnips , Crabapples , Firethorns . Prune to improve air circulation. Plant resistant varietes. For Fruit use Benomyl , Fruit-Guard in the spring at bud break, again at pink bud stage, one week after petal fall and 5 weeks later.