i6o 



CROP PRODUCTION 



should be employed. The leaves of cherries are often 

 injured by the Cherry Slug, pictured below, which is 

 easily killed by dusting air-slaked lime or other pow- 

 dery materials over the tree, or by spraying with 

 hellebore or arsenate of lead. The young leaves are 

 also attacked by the Cherry Aphis, a pest to be des- 

 troyed by early spraying with dilute kerosene emul- 

 sion or some form of tobacco decoction. 



