X CONTENTS 



PAGE 



Insects Responsible for the Damage 265 



The Causes of Insect Attacks 265 



Methods of Control and Prevention 267 



Protection and Increase of the Natural Enemies of the Injurious 



Insects 267 



Disposal of Slash and Other Material in which Insects find Favor- 

 able Conditions for Breeding 268 



Special Silvicultural Measures to Prevent the Creation of Condi- 

 tions Favorable to Injurious Insects 270 



References 271 



Chapter XVII. Protection Against Tree Diseases 274 



Fungi 274 



Extent and Character of the Injury 275 



Methods of Control and Prevention 277 



Tree Diseases and Injuries Other than Those Produced by Fungi. . . 279 



References 280 



Chapter XVIII. Protection Against Domestic Animals; Grazing 284 



Introductory 284 



The Effects of Grazing 285 



Effect Upon the Soil 285 



Effect Upon Reproduction 286 



Effect Upon Trees Past the Reproduction Stage 287 



Effect Upon the Control and Prevention of Forest Fires 287 



Benefits versus Injuries from Grazing 287 



Methods of Control and Prevention 288 



Protection by Excluding Domestic Animals 289 



Protection by Close Regulation of the Grazing 289 



References 291 



Chapter XIX. Protection Against Animals — Other than Insects 



and Domestic Animals 293 



Deer 293 



Beaver 293 



Porcupines 293 



Rabbits 294 



Squirrels 294 



Mice 294 



Birds 294 



References 29s 



