40 



NEW YORK STATE MUSEUM 



The two check trees in each of the three unsprayed plots show 

 wide variation in yield, ranging from 651 to 5419 apples for the 

 Kendall and Webster orchards, respectively. The perfect fruit 

 varied from 1.32 t9 20.96 per cent, scab infecting 88.45 psr cent 

 of the apples in the Newfane orchard and 74.77 per cent in the 

 Webster orchard. 'A considerable variation is also noticed in the 

 amount of fruit injured by the leaf roller and the codling rn.oth, 

 this latter being particularly marked when the results obtained in 

 the 'Wfebster iorcharii are compared with the other two plots. The 

 most Striking contrast is seen in the percentage of end wormy, this 

 amouijiting iii the ca,se of the Newfane orchard to 29.92, while in the 

 Kendall orchard it was only 2.76 and in the Webster orchard .31. 

 The cpmparative freedom; from codhng moth injury of the check 

 trees in the Webster orchard has been commented upon above. 



Comparative tabulation of codling moth results in three orchards 1915 



TREATMENT 



One spraying 



Total 



34 492 



Per cent 



Two sprayings 



Total 



Per cent 



24 089 



Three sprayings 



Total 



Per cent 



29 830 



Checks or un- 

 sprayed 



Total 



Per cent 



7 049 



14 060 



40.76 



13 973 



58. 



20 6S7 

 69.24 



I 212 

 17.19 



17 193 

 49.84 



6 683 



27.74 



S 306 

 17.78 



5 337 



75.71 



LEAF 

 ROLLER 



OR 

 GREEN 

 FRUIT 

 WORM 



3 726 

 10.80 



3 013 



12.50 



2 414 

 8.09 



680 

 9.64 



CODLING MOTH, WORMY 



Total 



3 502 

 10. IS 



2 135 

 8.86 



2 460 

 8.24 



I 456 

 20.65 



End 



147 

 .42 



SI 



.17 



328 

 4-65 



Side 

 July 



3 119 

 9.04 



I 907 

 7.91 



2 167 

 7.26 



I 374 

 19.49 



Side 

 August 



427 



1-23 



329 



1.36 



273 



• 91 



376 

 533 



The comparative tabulation of the results obtained from the three 

 sprayed plots and on the check or unsprayed trees, shows in the first 

 place a somewhat uniform total yield from the plots in the orchards 

 treated in the same :m.anner, though as brought out above, in two of 

 the orchards at least, there were considerable discrepancies between 

 the plots receiving the different treatments. It will be noted on 

 referring to the table, that the percenta!ge of perfect fruit increases 

 progressively with the number of sprayings from 40.76 in the case 

 of one application to 58 for two applications, and 69.24 for three 

 applicp,tions, |there being aisimilar and related decrease in scab infec- 

 tion. The control of this fungus was the important factor in 



