Grapevine Aphid, Aphis illinoisensis Shimer (Homoptera: Aphididae)
The grapevine
aphid is rarely a serious pest of cultivated grapes. The aphids pass the winter
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e
egg stage on viburnum. Hatching begins in early spring. Initially, wingless
generations are produced, after which winged individuals make their appearance
and fly to vineyards. Colonies of the aphid develop on the young shoots and
leaves. The aphids are dark brown and the adult females are about 1/10 inch
long. In the fall, winged aphids again develop; they return to viburnum and give
rise to the egglaying females.
There are numerous natural enemies of the grapevine aphid, including ladybird beetles, lacewings, syrphid fly larvae and parasitic wasps, which usually exert some degree of control on the aphids. This insect normally does not pose a serious threat to grapevines.
Current pesticide recommendations may be found Here