Peach Leaf Curl: Identification, Prevention, and Management

Understanding This Devastating Disease

Peach leaf curl, caused by the fungus Taphrina deformans, is among the worst diseases affecting peaches and nectarines. It thrives in rainy, cool springs. Spores overwinter on bark, then rain carries them to developing leaf buds in spring. Symptoms include puckered, curled, thickened leaves with reddish blisters; leaves may turn red or yellow. Later, powdery grayish-white spores form and spread to bark and buds. Fruit is often absent or misshapen and drops prematurely.

Prevention Strategies

• Plant resistant varieties.
• Thorough fall cleanup—remove all debris beneath trees.
• Spray with sulfur or lime sulfur during dormancy; timing is critical (consult your Cooperative Extension Office for optimal dates).
• For dwarf varieties, cover trees with plastic sheeting during spring rains.

No chemical control exists once infection occurs.