Peach-Leaf Curl

Causes leaves of peach and nectarine trees to curl and twist as though infected with blisters.  It's a common problem, but it's not serious.  Remove the diseased leaves and compost them.  Fertilize trees with compost, and spray with fungicide before the buds break in spring and later just after leaves fall.  Or spray leaves with onion water at the first sign of curl.