58 



ASSOCIATION OF ECONOMIC ENTOMOLOGISTS. 



age of less than 1 calyx worm to a tree was obtained. In general, 

 this shows that such spraying practically exterminates the worms 

 that go in at the calyx and also shows the superior value of the first 

 spraying in bringing this about. 



CALYX 





SIDE 



I 



TOTAL 



7Z 



1 



! ■ a 



000 00/ 0/0 ioo //O /// 



Unspr'd 3~S/)ray el'Stray ^Sbray Zvjjrap 3S6ray<5 



only Off/y 0/7/y 



Fig. 1. — Chart to illustrate relative value of early sprayings on the first brood of 

 " worms " of the codling moth. 



Of those going in on the side a slightly larger percentage escaped, 

 and as' would be expected there was also less difference in killing 

 power of the two sprayings, and more gained' by combining them. 

 Though lower than in the calyx, the killing power here indicated 

 is very high. 



