Nymphs and adult insects, both are soft-bodied, pear-shaped and blackish in colour.
Large colonies of nymphs and adults are found on tender twigs and shoots as well as on the ventral leaf surface sucking the vital sap from the tissues.
The affected parts turn yellow, curls, wrinkles and deform in shape and ultimately dries and perishes.
Fruit size and quality are also reduced.
The aphids also produce copious quantities of honeydew on which sooty mould develops which in turn hinders the photosynthetic activity of the vines, resulting in stunted growth.
For its control spray IMIDACLOPRID 17.8% SL @ 100ml/acre OR ACEPHATE 75 %SP@ 300 gm/acre OR ACETAMIPRID 20 % SP @ 100 gm/acre.
As a biological treatment, use BEAUVERIA BASSIANA @ 250 gm/acre.
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