Sour cherry yellows
Disease
Sour cherry yellows
Prune Dwarf Virus (PDV)
Distribution: The pathogen is widely distributed in the United States.
Photos
Older trees show a willowy growth or bare wood from fewer fruiting spurs.
Wayne Wilcox, Cornell Univ.
B
Young leaves develop chlorotic yellow rings or mottle; shot hole may occur in severe cases or as lesions age. These symptoms rarely recur after the first year of infection. In subsequent years, leaves develop a distinct irregular green to yellow mottling and interveinal chlorosis, then drop 3 to 4 weeks after petal fall (A). Successive waves of mottling and dropping occur in response to day/night temperature fluctuations. Older trees show a willowy type of growth or bare wood from a reduction of fruiting spurs (B). Fruit are sparse but large. Similar symptoms occur on sweet cherry. Infected plum develops narrow, strap-like leaves that are thicker than normal.