20 



DECIDUOUS FRUIT INSECTS AXD INSECTICIDES. 



as follows: Ohio, New York, Pennsylvania, Indiana, Illinois, Michi- 

 gan, Missouri, Xew Jersey, Virginia, Maryland, West Virginia,, Iowa, 

 Delaware, and Arkansas. It is also reported as occurring in a num- 

 ber of other States in which the production of grapes is very 

 limited, namely, Massachusetts, Connecticut, Kentucky, Kansas, 

 Texas, Nebraska, and Wisconsin. In Canada it is reported from the 

 vicinity of London, Ontario. 1 



FOOD PLANTS. 



When Clemens described the American grape-berry moth in 1860 

 he recorded it as having several food plants and made the following 

 statements concerning the habits of the larva: 



The larva feeds on the fruit of the grape in September; a silken gallery is attached 

 to the external opening of the fruit. Its head is dark brownish; shield blackish; body 



ala. V G A Xy^Regions of extensive 

 cjrape production 



Reccrdad distributor! 

 of Polychrosi viteana. 



Fig. 4.— Map showing distribution of the grape-beny moth (PoJychrosis viteana). (Original.) 



immaculate dark green. It may likewise be taken on the fruit of wild raspberry. The 

 individual feeding on the grape undergoes transformation by weaving a cocoon on the 

 surface of the ground and that from the raspberry under an excised and turned down 

 portion of leaf. This, however, may not be its normal habit. 



Clemens also records it as feeding on leaves of sassafras. 



Since that time a number of other entomologists have added several 

 food plants to this list. Packard, in 1868, stated that the first brood 

 feeds on the leaves and tendrils of the grape. 



Slingerland gives the following list of food plants added by ento- 

 mologists during the next thirty years: 



Blackberry blossoms (Riley, 1S70\ roses and Vernonia or ironweed (Murtfeldt, 1880 

 and 1882), tulip-tree leaves and swollen stems of Amorpha (Fernald, 1882), flower-buds 



i Saunders, Wm. — Can. Ent., vol. 14, pp. 178-180, 1SS2. 



