GRAPES 203 



regularly sprayed vineyards. However, since 

 the insect lives on wild vines, it should be 

 watched for each year whether the vineyard has 

 been sprayed or not. 



The grape berry moth is an annoying pest, 

 the larval form of which feeds in the fruit. 

 Repeated sprays of arsenate of lead are needed 

 in sections where it is common. The spray 

 solution should also contain enough soap to 

 enable the spray to spread over the surface of 

 the grape and prevent it from drying on in 

 drops. If the soap is not added the young 

 larva will readily find uncoated surfaces 

 through which it can penetrate unharmed. 



The grape root worm has caused serious 

 damage in vineyards in many sections. The lar- 

 val form feeds on the small roots of the vine, 

 reducing its vitality and ultimately causing its 

 death. Clean cultivation is of some value in 

 this connection. The adult beetles feed on the 

 surface of the leaves and many of them can be 

 killed by spraying. There are a number of in- 

 jurious diseases that affect the grape in differ- 

 ent ways. Several forms of rot may attack the 

 fruit. The importance of these diseases varies 

 with the location to a great extent. In some 

 sections the vines are fairly free from such 

 trouble while in other places the crop may be 

 almost entirely destroyed by rot. 



Most careful vineyardists spray three or 



