238 FOREST PROTECTION 



Part II. Protection of the forest against animals. 

 Protection against game. 

 Protection against other rodents. 

 Protection against birds. 

 Forest insects. 



Insects useful to forests. 



Injurious forest insects. 



Part III. Protection against plants. 



Protection against forest weeds. 

 Protection against fungi. 



Part IV. Protection against atmospheric influences. 



These include frost, insolation, wind, 

 violent rain, hail, snow and rime. 



Part V. Protection against non-atmospheric natural 

 phenomena. 

 Protection against damage by water. 

 Protection against avalanches. 

 Protection against shifting sand. 

 Protection against forest fires. 



Part VI. Protection against certain diseases. 



These include red-rot, white-rot, stag- 

 headedness, abnormal needle-shedding 

 and damage from acid fumes. 



Protection from grazing animals (domestic) is curiously 

 enough not placed in "Part II, Protection of the forest against 

 animals," but under "Part I, Protection of forests against 

 man," under the subdivision "Protection of forest against 

 irregularities in utiHzing forest produce." 



The relative importance of a given branch of protection 

 changes from region to region. This is illustrated by the 



