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Currant Blister Aphid



P_currantblisteraphd2

Currant Blister Aphid

Usually appear in

Spring to Summer


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Caused By:-     The Aphid Cryptomyzus ribis

Description

Currants especially red currant develops red raised areas that look like welts on its leaves. Currant blister aphids are pale yellow and live on the underside of the leaves in late spring-early summer where they feed by sucking sap. They also secrete chemicals into the foliage and this causes the puckering and distortion. Other species of aphid occur on currants but they do not produce this characteristic blistering symptom. In spring, spray plants with the systemic insecticide kill the emerging aphids which overwinter on other wild flowers especially Stachys sylvatica (Hedge Woundwort). Don't wait for the symptoms to appear, as there's no point in spraying once the leaves have become puckered.The distorted growth is very noticeable, although the plant’s vigour and ability to bear fruit is not greatly affected so treatment is not essential. An organic solution if the symptoms were evident in the previous summer is to spray plants with an enzyme wash which will get rid of the eggs by quickly dissolving them. Picture from Wikimedia Commons.


Control

In spring, spray plants with the systemic insecticide kill the emerging aphids which overwinter on other wild flowers especially Stachys sylvatica (Hedge Woundwort). Don't wait for the symptoms to appear, as there's no point in spraying once the leaves have become puckered.The distorted growth is very noticeable, although the plant’s vigour and ability to bear fruit is not greatly affected so treatment is not essential. An organic solution if the symptoms were evident in the previous summer is to spray plants with an enzyme wash which will get rid of the eggs by quickly dissolving them.

P_currantblisteraphd2 P_currantblisteraphid

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