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in : Problems: Fruit & nuts
Sap-sucking aphids cause the leaves of currant bushes to become distorted, with raised, puckered areas and patches of yellow-green or red.
Sap-sucking aphids are problematic for currant bushes. In spring, they cause the foliage to become blistered and puckered, as well as discolouring areas, leaving yellowish-green or red patches. The aphids then fly to hedge woundwort, a wildflower, for the rest of the summer, but return to the currants in autumn to lay their eggs. Since the currant crop isn't affected, action isn't essential.
If the symptoms were evident last summer, in winter get rid of the eggs by spraying plants with an enzyme wash, which will quickly dissolve them.
In spring, spray plants with the systemic insecticide thiacloprid or pyrethrum to kill the emerging aphids. Don't wait for the symptoms to appear, as there's no point in spraying once the leaves have become puckered.
24/11/2011 at 15:27
i find ends of Blackcurrant leaves seem to have a whitish powder and curl. what is this? how do I get rid of it.
24/11/2011 at 15:29
it left me with more questions