As the winter was very West-side, so was the peach leaf curl. Peaches and nectarines are rarely killed outright by this disease, but they can be so weakened by repeated attack that they die from Winter cold, or attack by another disease or insect. As the leaves emerge in the spring, the develop a puckered, rumpled texture, and become yellow with reddish highlights. As the leaves grow, they thicken and become quite tristed and brittle. A white powder grows on the surface of affected leaves.
Leaves drop as the Summer progresses.
Click Here for another picture. Tulasne by scientists, form spore production bodies called asci on the upper surface of the affected leaves. These asci develop eight spores each, which shoot out and, if the fungus is lucky, land on a suitable host. These ascospores germinate and develop yeast-like conidia which replicate rapidly by division. These conidia reproduce on the shoot tips and keep the current season shoots covered with spores.