The grape phylloxera is native to eastern United States, but has been distributed to other grape regions of the U.S. and is also established in Europe and all over the cultivation area, where it is of great economic importance. Continue reading “Phlloxera”

Grape Berry Moth

The larvae of this insect can cause serious damage to commercial vineyards by feeding on the blossoms and berries. Infested berries may appear shriveled with fine webbing. Damage by grape berry moth may increase mold, rots and numbers of fruit flies. While grape berry moth larvae may only damage a few berries in a cluster, it is impractical for growers to remove damaged berries and webbing from clusters. Hosts include wild and cultivated grapes. Continue reading “Grape Berry Moth”

Mealy bug

Damage Mealy bug, pseudococcas maritimus, is a serious pest of both wine and juice grapes. This pest produces honeydew that makes the fruit, shoots, and foliage sticky. A black fungus, Cladosponumspp., grows on the honeydew, producing a sooty mold. Serious honeydew and sooty mold contamination will make the fruit unsuitable for processing into wine or juice. Continue reading “Mealy bug”

Aphid -Aphids illinoisensis

The grapevine aphid is rarely a serious pest of cultivated grapes. The aphids pass the winter in the 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 Continue reading “Aphid -Aphids illinoisensis”