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Blackcurrant leaf trouble

babsagainbabsagain Posts: 17
in Problem solving

Blackcurrant leaf

My blackcurrant bushes are just coming into leaf and I have noticed a number of (still small) leaves have quite pronounced red blotches.  I can't see any little 'visitors' on the back of the leaf I picked although greenfly are in evidence on other leaves.  Can anyone offer advice - please!!

Posts

  • PalustrisPalustris Posts: 4,307

    Blister aphids

    Sap-sucking aphids cause the leaves of currant bushes to become distorted, with raised, puckered areas and patches of yellow-green or red.

    Organic

    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.

    Chemical

    In spring, spray plants with the systemic insecticide 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.

  • babsagainbabsagain Posts: 17

    Thanks for the info.  I'll start on the little blighters tomorrow before the rain arrives.

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