Shoot distortion by black cherry aphids, Myzus cerasi

Feeding by black cherry aphids causes the typical symptoms of aphid damage - distortion and curling of the shoots and associated leaves. Extension growth of shoots is often reduced and blossoms may also be damaged. Black cherry aphid can also cause reduction in fruit size. Honeydew produced by all aphid species is a substrate for the development of sooty mould and can contaminate fruits and leaves. Many aphid species transmit viruses. Black cherry aphid is primarily a pest of sweet cherries but also attacks sour cherries. Its secondary hosts (in summer) include plants in the mustard family and weeds such as speedwells.

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