[6] Peach leaf curl is a distinctive and easily noticeable fungal disease, and the severity of the symptoms depends on how early infection has occurred.

Diseased leaves can usually be identified soon after they emerge from the bud, due to their red color and twisted shape.

The color of the leaves changes from the normal green to red and purple, until a whitish bloom covers each leaf.

The fungus T. deformans causes deformed young leaves, red blisters, and ultimately the whitish bloom that covers the leaf as the infection progresses.

One ascus consists of eight ascospores that create conidia, which are ejected in early summer and spread by rain and wind.

[8] Removing the infected leaves and fruit after they fall to the ground is sometimes also suggested but superfluous if, in the following winter, fungicides or rain protection are applied.