Apple stem pitting virus

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pear leaves with symptoms of Apple stem pitting virus infection (click on image to enlarge it)
Author(s): Yuan-Min Shen, Taichung District Agricultural Research and Extension Station
Source: IPM Images

Apple stem pitting virus (ASPV)

This virus has a wide distribution in Europe, Asia and the Americas. It has been mainly reported to infect apple, pear and quince. Although most infections are symptomless, it causes stem pitting and other symptoms on several susceptible cultivars of apple. Some pear varieties show chlorotic bending of leaf veins and infected quince can develop deformed fruits. Even symptomless trees might have reduced growth.

Synonyms:
Pear vein yellows virus

Vernacular names
• Deutsch: Stammnarbungsvirus des Apfels
• English: apple stem pitting virus
• Français: virus du bois strié du pommier