APPENDIX. 315 



seventy-five per cent, of the tii-st brood of worms may be killed with the 

 spray, the few worms left will form a sufficient nucleus for a large and very 

 destructive second or third brood ; in these localities the best that can be 

 advised at present is to supplement the poison spray with the old banding- 

 system. 



To use the poison spray the most effectively, one must understand that it 

 is necessary to fill the blossom end of each apple with poison within a week 

 after the blossoms fall, for this is where the little apple worm gets its first 

 few meals, and it is practically our only chance to kill it with a spray. 

 Watch the developing fruit after the petals fall, and be sure to apply the 

 poison before the calyx lobes close (as at a and h in Fig. 131), for while the 

 falling of the blossoms is the signal to begin spraying, the closing of these 

 calyx lobes a week or two later is the signal to stop spraying. 



While we thus have no new methods to offer, and doubt if anything 

 better than the poison spray will be found for combating this insect, we 

 believe that a better understanding of the " whys and wherefoi'es " of the 

 methods already in use will insure still greater success with them. 



