(U 



ASSOCIATION OF ECONOMIC ENTOMOLOGISTS, 



Examining to see where the worms were killed we found that 

 there was little difference in the percentage killed in the calyx and 

 bide. "Wherever the largest number of worms were, there the per- 

 centage killed was the highest. 



THE RELATIVE VALUE OF EARLY AND LATE SPRAYINGS. 



(Fig. 8.) 



The entire value of the late sprayings can be measured by the num- 

 ber of worms killed in the second brood, and is easily obtained from 

 the above tables. In the case of the early sprayings the problem is 

 much more complex. A certain number are killed in the first brood, 



CD 





Fig. 3.- 



KilW^ \^l\e^ (iloue 

 Killed ^oUou)m^ ^w\\^ oi\es 



Toi;a\. value 

 Killed ^oVVoxuvai:^ La\\.\^ ones 



-Chart to illustrate relative value of early and late sprayings for the codlinj; 



moth. 



still more in the second, but by killiug the worms in the first brood a 

 larger number are prevented from api)earing in the second. This 

 latter factor is no doubt variable, and up to the present time no 

 metliod has been devised by which the ratio of increase can be accu- 

 rately determined. Estimating this increase at live times is doubtless 



