140 



DECIDUOUS FRUIT INSECTS AND INSECTICIDES. 



Table XX.— Sound and wormy fruit from unsprayed, demonstration, and one-spray 

 plats. Saugatuck, Mich., 1909 — Continued. 



PLATE II. DEMONSTRATION-Continued. 



Condition of fruit. 



Tree 

 118. 



Tree 

 127. 



Tree 

 132. 



Tree 

 135. 



Tree 

 136. 



Total 



for 



plat. 



Total 

 per cent 

 sound. 



Wormy 



25 



5,188 



91 

 4,336 



13 



4,285 



245 



3,978 



76 

 1,644 



998 

 41,820 





Sound 









Total 



5,213 

 99.52 



4,427 

 97.94 



4,298 

 99.69 



4,223 

 94.19 



1,720 

 95.58 



42,818 





Per cent sound 



97.66 







PLAT 



III. ONE SPRAY. 











Condition of fruit. 



Tree 

 224. 



Tree 

 225. 



Tree 

 232. 



Tree 

 236. 



Tree 



237. 



Tree 

 238. 



Tree 

 239. 



Wormy 



500 

 3,113 



103 

 4,602 



396 



3,061 



343 



2,753 



118 

 2,779 



41 

 3,510 



62 



Sound 



3,062 







Total 



3,613 

 86.16 



4,705 

 97.95 



3,457 

 88.54 



3,096 

 88.92 



2,897 

 95.92 



3,551 

 9a 84 



3,124 



Per cent sound 



98.01 







Condition of fruit. 



Tree 



244. 



Tree 

 245. 



Tree 

 246. 



Tree 

 249. 



Tree 

 252. 



Tree 

 266. 



Total 



for 



plat. 



Total 



per cent 



sound. 



Wormy 



452 

 4,107 



340 

 4,001 



165 

 2,743 



62 



3,381 



46 

 1,092 



110 

 1,925 



2,738 

 40, 129 





Sound 









Total 



4,559 

 90.08 



4,341 

 92.16 



2,908 

 94.32 



3,443 

 98.19 



1,138 

 95.95 



2,035 

 94.59 



42,867 





Per cent sound 



93.61 







In the foregoing table the demonstration plat shows an increase of 

 sound fruit over the one-spray method of 4.05 per cent and over the 

 unsprayed plat of 19.87 per cent. There was less injury on the 

 unsprayed trees than usual for that section, due to the small size of 

 the second brood. Only 13 per cent of the first-brood larvae from 

 bands transformed to moths. 



The effect of the* treatments on the places of entrance of fruit by 

 larvae of the first and second broods is shown in Table XXI. 



Table XXI. — Places of entrance of fruit by total larvae for each tree of each plat. Sauga- 

 tuck, Mich., 1909. 



PLAT I. UNSPRAYED. 



Brood and place of entrance. 







Number of larvae for each tree. 







Tree 1. 



Tree 3. 



Tree 4. 



Tree 7. 



Tree 9. 



Tree 10. 



Tree 13. 



Tree 16. 



First brood: 



Calyx 



133 

 39 

 5 



206 

 24 



8 



172 



25 







65 

 10 

 



316 

 28 



7 



257 

 28 

 6 



168 

 17 



4 



214 



Side 



40 



Stem 



5 







Total 



177 



238 



197 



75 



351 



291 



189 



259 







Second brood: 



Calyx 



277 



213 



16 



272 



249 



9 



274 



155 



15 



51 

 39 

 2 



279 



319 



19 



316 

 360 

 30 



140 



87 



7 



357 



Side 



306 



Stem 



11 







Total 



506 



530 



444 



92 



617 



706 



234 



674 







