Peach leaf curl, a disease caused by the fungus Taphrina deformans, first appears as reddish areas on developing leaves in the early spring.These reddish areas soon become thickened and puckered, causing the leaf to curl. Infections lead to severe distortion of the leaves soon after leaf burst in spring. Disease incidence is highest and most noticeable during wet conditions (Steiner and Biggs, 2010). Peach leaf curl is a disease made for a Kodak moment: infected leaves are curled and blistered, some of which are light green, red, or purple. PEACH LEAF CURL .
The fungus that causes peach leaf curl (Taphrina deformans) survives as spores in microscopic crevices on the tree. Disease cycle of peach leaf curl Peach leaf curl is caused by the fungus Taphrina deformans. Taphrina deformans survive winter on buds or twigs of the tree. Cool (48-68°F) wet weather when leaves are first opening favors the disease. Peach leaf curl is a disease caused by the fungus Taphrina deformans. Disease Cycle. Fruit can either drop prematurely or show surface distortions. Taphrina deformans is a fungus and plant pathogen, and a causal agent[s] of peach leaf curl. Biology Peach leaf curl occurs primarily on peach and nectarine and sometimes on apricot. It is favoured by prolonged wet, cool weather in the spring as new growth is developing. This pathogen harms the leaves, weakening the tree and reducing the amount of fruit it produces. Peach leaf curl a worldis -wide disease and one of most common diseases in commercial and residential orchards in Connecticut. Unfortunately for him, so does a fairly nasty fungus called Peach Leaf Curl. The main symptom of Peach Leaf Curl is red pimple-like deformations on young leaves which, as they grow, become unsightly. Symptoms: Infected leaves become thickened, curled and discoloured, and eventually dry up and drop. Leaves will also undergo chlorosis, turning a pale green or yellow, and later show a red or purple tint. Frequent periods of rain in spring, as peach and nectarine buds are opening, will lead to infection. Water from rain and irrigation spreads this fungus, and the spores survive the high temperatures and dry conditions of summer.

And to really frustrate growers, the disease often fails to appear for years, even without fungicide treatments, only to suddenly appear in epidemic proportions during a particularly wet, cool spring. Taphrina deformans infects peaches and nectarines, also almonds and occasionally apricots and ornamental Prunus . Effect of the Disease: The disease causes much defoliation and distortion of … T. deformans is found in the United States, Europe, Asia, Africa, Australia, and New Zealand. In India, the disease is prevalent in peach orchards of Kumaon, Kulu and other parts of the Sub- Himalayan range. Infected leaves pucker, thicken, curl and often turn red. Infected leaves eventually turn yellow and drop from the tree.

Spores of Taphrina deformans, the fungus that causes peach leaf curl, overwinter on the buds and twigs of the host tree. May is the month when diseases start to come out full force. The Best Fruit Tree Spray for Peach Leaf Curl.