Peach leaf curl
Peach leaf curl is a serious fungal disease that can attack almonds, apricots, peaches and nectarines and related ornamental Prunus trees.
Large red blisters occur on the leaves which later turn white as masses of white spores appear on the surface. Early leaf fall results, weakening the tree. The spores can infect developing leaves during the growing season and also overwinter between the bud scales and on the tree bark.
Control by spraying with dithane in mid-February and again a fortnight later.
Spray again just before leaf fall in autumn.