92 NEW YORK STATE MUSEUM 



moths so far as practicable would do much to avert trouble. 

 There are other insect pests which also need attention. 



9 In conclusion, we would emphasize the fact that not all 

 the sickly trees were injured by the application. Moreover, the 

 majority of the sprayed maples were infested by insects and 

 therefore less able to withstand injury. Had the season been as 

 early as usual,, it is probable that the damage would not have 

 been so severe. Nevertheless, the use of oils or oily prepara- 

 tions on living plants is attended with a certain amount of 

 danger. 



