146 THE :NTT CULTURIST. 



patches of the wild hazel bushes, but this insect seems 

 to prefer the elm, hence is rarely found on the hazels. 

 But should it ever invade our filbert orchards, it can be 

 readily destroyed by dusting or spraying the trees with 

 Paris green, London purple, or other well-known in- 

 secticides. There may be an occasional invasion of cat- 

 erpillars, like the tent worms, span worms, leaf rollers of 

 various species, and what are called leaf miners, but as 

 these infest almost all kinds of deciduous trees and 

 shrubs, we cannot consider them specially injurious to 

 the filberts and hazels. 



