The Care of Trees 141 



than once a year in order to kill insects or fungi that infest 

 the tree at different seasons. Some sprays would injure 

 the foliage and must be applied before the buds open. 



The direction of the wind must be considered when 

 spraying, and for thorough work the spraying should be 

 repeated after the wind shifts, so as to get the poison 

 on both sides of the leaves. If a heavy shower falls 

 shortly after the trees have been sprayed, the work must 

 be done again. Wet seasons sometimes necessitate 

 spraying several times. Thoroughness should be the 

 watchword in spraying ; neglect of thorough spraying is 

 like attempting to put out a fire by throwing. a great deal 

 of water everywhere except upon one little neglected 

 spot, from which it may spread into a conflagration. 



Assistance of birds in protecting trees. In caring 

 for trees the assistance of the birds should not be despised, 

 for they are incessantly searching for insect pests. 

 Without their help the insect enemies would be hard 

 to control. The birds should be made welcome and the 

 trees and grounds made as safe and inviting for them 

 as possible. In another part of this book suggestions 

 for attracting birds will be found. 



Name some animals that injure trees with their teeth. 

 How would you prevent this? In what ways are trees 

 likely to be damaged by wires or cables? Have you 

 known of trees needlessly injured in still other ways ? 

 Was the injury due to carelessness, ignorance, or some 

 other cause? 



Tree surgery. Tree surgery is practiced by men who 

 have had training in this art. As dentists fill cavities 

 in teeth with gold or amalgam, these men fill cavities 



