Grape Scale, Diaspidiotus uvae (Comstock) (Homoptera: Diaspididae)
Grape scale is not a
common insect in Ohio, existing only in the southern part of the state. The
insect occurs, to a very limited extent, on forest and shade trees, though
records show serious injury only to grapes.
Mature scal.jpg)
es
are flat, elliptical and about 1/15 inch in diameter. They are pale
yellowish-brown with a pale yellow nipple to one side of center. The wingless
female scale overwinters in nearly full-grown form and completes growth in the
spring. During May and June she gives birth to 35-50 living young. As with all
armored scales, the life of this insect, with the exception of the short period
of activity of the young and the winged male, is passed under the protection of
the waxy scale cover. Scale infestations are located on 2-year-old wood. When
severe, grape scale infestations can retard development of the vines.
Current
pesticide recommendations may be found HERE
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