132 



DECIDUOUS FKUIT INSECTS AND INSECTICIDES. 



Table X. — Number of sound and wormy apples for each tree from one-spray, demon- 

 stration, and unsprayed plats. Crozet, Va., 1909. 





PLAT V. DEMONSTRATION. 











Condition of fruit. 



Tree 1. 



Tree 2. 



Tree 3. 



Tree 4. 



Tree 5. 



Tree 6. 



Tree 7. 



Tree 8. 



Total 

 for 



plats. 



Total 

 per 

 cent of 

 sound 

 fruit, 





90 

 712 



115 

 1,344 



68 

 651 



191 

 2,224 



173 

 1,859 



49 

 1,259 



54 

 2,958 



87 

 2,243 



827 

 13,250 





Sound 









Total 



802 

 88.78 



1.459 

 92.12 



719 

 90.55 



2,415 

 92.10 



2,032 

 91.49 



1,308 

 96.26 



3,012 

 98.21 



2.330 

 96.27 



14,077 







94.13 







PLAT VI. ONE SPRAY. 





498 

 2,080 



367 

 2,166 



627 

 4,478 



1,681 

 1,150 



445 

 2,800 



362 

 1,617 



391 

 1,650 



462 

 1,577 



3,320 

 17,518 













Total 



2,578 

 80.30 



2,533 5,105 

 85.52 ! 87.72 



1,318 

 87.26 



3,245 

 86.29 



1,979 



SI. 71 



2,041 

 80.90 



2,039 

 77.35 



20,838 







84.07 













PLAT VIII* UNSPRAYED. 



Wormy 



1,165 



2,258 



1,593 



2,089 



545 

 271 



560 

 456 



1,641 

 1,470 



1,444 

 1,544 



1,089 



904 



1,001 

 1,206 



9,038 

 10, 198 













Total 



3.423 

 65.97 



3.682 

 56.79 



816 

 33.22 



1,016 

 44.89 



3,111 

 47.90 



2,988 

 51.68 



1.993 

 45.31 



2,207 

 54.65 



19, 236 







Per cent sound 



53.02 







Plat V, which received the demonstration treatment, gave 94.13 

 per cent fruit free from codling-moth injury, as against 84.07 per cent 

 fruit free from this insect on the one-spray plat, a difference in favor 

 of the demonstration treatment of 10.06 per cent. The check or 

 unsprayed plat (VIII) shows 53.02 per cent fruit free from codling- 

 moth injury, and there is thus a gain in sound fruit by the demon- 

 stration treatment of 41.11 per cent and by the one-spray method 

 a gain of 31.05 per cent of sound fruit. As will be seen from the 

 foregoing table, there were counted in Plats V, VI, and VIII, respec- 

 tively, 14,077, 20,838, and 19,236 apples, a total for all plats of 

 54,151. Undoubtedly the results from the one-spray plat are less 

 favorable than would have been the case had there been no hail. 

 The injured places on the sides of the fruit permitted ready entrance 

 of the larvae, as indicated on all plats by the relatively high percentage 

 of larvae which entered the fruit on the side. This condition is shown 

 in Table XI, which gives the places of entrance of the fruit for each 

 tree of each plat for the total larvse of the two broods throughout 

 the season. 



