ONE-SPRAY METHOD FOR CODLING MOTH, ETC. 



101 



Table XII. — Places of entrance of fruit by total larva; of the codling moth for each tree 

 of each plat. Camden, Del., 191 1 . 



PLAT II. LIME-SULPHUR DEMONSTRATION. 



PLAT VII. ONE-SPRAY METHOD. 



First and second broods: 



Calvx 



Side 



Stem 



Total. 



1,303 



PLAT VIII. UNSPRAYED. 



First and second broods: 



Calyx 



Side 



Stem 



Total. 



1,324 

 492 



248 



2,064 2,427 



1,506 

 235 



970 

 333 



206 



1,509 



1,142 

 437 



182 



1,761 



1.472 

 725 

 268 



2,465 



416 

 140 



1,555 



6,593 

 3,909 

 1,279 



11,781 



55.96 

 33.18 

 10. 86 



100. 00 



11,781 



On the demonstration plat there was a total of 147 larvae; on the 

 one-spray plat, 1,303 larva?; and on the unsprayed plat, 11,781 larvae. 

 The notably greater number on the one-spray plat than on the 

 demonstration plat is probably due to the former being next to the 

 unsprayed plat, as above mentioned, from which moths no doubt 

 migrated during the season. 



A more ready comparison of the efficiency of the treatments of 

 Plats II, VII, and VIII is given in Table XIII. 



Table XIII. — Efficiency of the demonstration and one-spray treatments for the codling 

 moth as shown by the percentage of wormy apples. Camden, Del., 1911 . 



It will be seen here that the one-spray method was nearly as 

 effective as the demonstration in preventing calyx entrance, the 

 difference in favor of the demonstration treatment being 0.33 per 

 cent. The one-spray method in this case shows considerable protec- 



