Peach Leaf Curl (Taphrina deformans) is caused by a fungus belonging to the sac fungi (Ascomycota). The spores of the fungus hibernate on the bark of the tree. When the temperature rises above 10 °C, the spores become active and infect the tree. If the temperature rises to 16°C, the infestation stops. Rain spreads the germinating spores across the tree. During a humid period, the fungus reaches full maturity and the infection becomes visible. The young leaves swell, turn red, develop bumps, curl and become covered with a fungal layer. Wind and rain then spread the spores.
Remove affected branches.
There are resistant varieties.
By creating large distances between the trees, the wind has free rein, so that the trees dry faster.