CULTURE OF THE GRAPE. 257 



It is a statement easily tested, and if trw, of which I 

 am somewhat doubtful, would 'prove an easy way of 

 destroying them. To my surprise, I have found the 

 Clinton, firm in its foliage as it is, to be more affected 

 than any other kind in my vineyard. I have never had 

 occasion to protect other kinds from thrip in the open 

 air, while this inferior fruit has suffered severely. 



I have never known the wingless species of aphis, or 

 green fly, seriously to infest the grape in the open air ; and 

 it seldom troubles the vine under glass. Should it be 

 found, it will be at the ends of the soft, new growth, 

 which, in the open air, may easily be cleared by either 

 dipping or syringing them with whale-oil soap or tobacco- 

 water. For aphis on the cherry and apple, I have used the 

 soap-suds with the best success. But it is fortunate that 

 this green fly does not show a preference for the vine. 



VEtfE-SCALE (Coccus vitte). 



This is a species of bark-louse, having the appearance 

 of a small scale. This is the protecting cover o a mi- 

 nute insect, which subsists by sucking the juices from the 

 bark. It is readily destroyed by washing it in a strong 

 solution of caustic potash. Also, as a preventive; when 



