i66 



DISEASES AND INSECT ENEMIES. 



is probably because the conditions are unfavor- 

 able for development. 



It is evident from what has been said that the 

 more spotted leaves there are in a house the 

 more chances there are for infection. Here, there - 



50. Spot disease artificially produced. 



fore, is one of the most important points in keep- 

 ing the disease in check: Every spot must be 

 removed and burned as soon as it is seen, and in 



