218 



INTERNATIONAL CONGRESS OP VITICULTURE 



Fig. 1. Moth (x5); Larvae (x8). 



The larvae of Polychrosis viteana have often been found feeding in the 

 clusters of wild grapes and as the species is confined in its range to North 

 America, there is little doubt that it is a native species turned pest through 

 the destruction of its original food plant. Riley gives an account of its 

 ravages in Illinois and Missouri in 1868 and 1869. At this time, it was noted 

 that the larvae pupated in a fold, or flap, of the leaf by drawing a section of 

 the leaf over itself and spinning a silken cocoon inside. Eudemis botrana 

 pupates on the posts, trellises or rough vines and never in a fold or pocket of 



Fig. 2. Pupa in fold of edge of leaf. 



