430 



FRUIT INSECTS 



bird beetles, parasites and mites are active enemies of this 

 grape scale. 



This pest can be controlled by thorough spraying with lime- 

 sulfur mixture while the vines are dormant. In case this 

 treatment has been neglected until the vines have started in 

 the spring, the increase of the scale may be checked by several 

 applications of either whale-oil soap, 1 pound in 4 gallons of 

 water, or with a 10-12 per cent kerosene emulsion. 



Reference 

 U. S. Bur. Ent. Bull. 97, Pt. VIl. 



1912. 



The Grape-berry Moth 



Polychrosis viteana Clemens 



The cause of most wormy grapes throughout the United 

 States and Canada is the caterpillar of a small purplish-brown 



moth which is always 

 present in most vine- 

 yards and often in de- 

 structive numbers. It 

 has been recorded in 

 injurious numbers in 

 Canada, Ohio, Illinois, 

 Missouri, Pennsylvania, 

 New York, Maryland, 

 Virginia and Texas. In 

 1902 a serious outbreak 

 occurred in the Chau- 

 tauqua grape belt of 

 western New York, 

 where in some vine- 

 yards losses of from 25 

 to 50 per cent of the crop are recorded and in one case 90 

 per cent of the fruit was ruined. 



Fig. 367. 



Pupse of the grape-berry moth. 

 Enlarged. 



