Insect and Fungous Enemies of the Grape. 37 
grapes, and when the infestation is considerable it is not suitable for 
raisins. (Fig. 38.) 
The insect upon hatching into the larva stage passes the winter, 
without further development, within the ovisac made by the female 
when depositing the eggs. With the first warm days of spring the 
larvee leave the ovisac and make their way to the vine, settling down 
under the loose bark, in crevices, etc., where the tender bark of the 
grape is exposed. The spring brood of mealybugs mature in June 
and eggs are again deposited by the females. The young of this sec- 
Fig. 38.—Accumulation of honeydew on grape cluster follow- 
ing presence of grapevine mealybug. 
ona or summer brood feed on the tender canes and foliage and when 
nearly grown are to be found in the bunches of grapes, soiling these 
as described. During September and October females again deposit 
eggs, the larve hatching but remaining in the cottony ovisac over 
winter. 
In its food habits the insect is practically omnivorous, and the 
grape is probably not especially suited to it as a host plant. The in- 
sect is averse to light and infests the vines where the dense foliage 
affords shade and the succulent fruit abundant food. 
48533°—21—Bull, 1220-6 
