DESTRUCTIVE INSECTS. Ill 



the wormy fruit as it falls, thus destroying the en- 

 closed insect, and preventing its spread. 



5. American Blight. This is a species of aphis 

 or plant-louse, covered with long, white, cottony 

 hair. In England, it has proved very destructive ; 

 and on young trees in this country it has done 

 some injury. It is destroyed by whale-oil soap, 

 and by lime wash. Other species of aphis often 

 infest the young leaves ; they are easily killed by 

 a solution of whale-oil soap, which may be applied 

 by a syringe or by immersing the branches. 



