CONTROL OF INSECTS INJURIOUS TO THE GRAPE 13.11 



Life History 



The winter is passed in the pupal stage on leaves underneath 

 the vines. About the time the grapes are blossoming, the moths 

 emerge and mate, and eggs are laid on the stems, blossom clusters, 

 and newly set fruit. When the caterpillars hatch they feed on the 

 stems and newly set fruit, often webbing a number of the berries 

 together (Fig. 451 ). Occasionally they will cat on the interior of 

 a berry. After reaching full growth, these caterpillars cut out a 

 portion of the leaf, drawing it into a pupal case by means of silken 

 threads (Fig. 452), and hero pupate (Fig. 453). 



FTG. 451. LARVA OF THE FIRST BROOD 

 01 (Ji; APE-BERRY MOTH FEEDING ON 

 EXTERIOR OF FRUIT (Enlarged) 



The second brood of moths emerge during the latter part of 

 July and August. Eggs are laid, and from these hatch the second 

 brood of caterpillars, which live entirely in the berries. They 

 often web several berries together, thus destroying much more fruit 

 tlia 11 is required for food. These larvae leave the berries about the 

 time the fruit is ripe, form cocoons on the leaves, and hibernate. 



