ONE-SPRAY METHOD FOR CODLING MOTH, ETC. 



127 



Table VII. — Injury by plum curculio for entire season on Plats I, III, IV, and V> 

 sprayed in the codling-moth experiments. Siloam Springs, Ark., 1909 — Continued. 



PLAT IV. DEMONSTRATION. 





Number of punctured and sound fruit, etc., per tree in each plat. 





Tree 1. 



Tree 2. 



Tree 3. 



Tree 4. 



Tree 5. 



Tree 6. 



Tree 7. 



Tree 8. 





1,293 



746 

 2,790 

 3,536 

 78.90 



562 



301 



1,589 



1,890 



84.07 



773 



437 



4,639 



5,076 



91.39 



98 



74 



1,591 



1,665 



95.55 



430 



266 



2,879 



3,145 



91.54 



432 



200 



1,465 



1,665 



87.98 



1,025 



498 

 1,998 

 2,496 

 80.04 



877 



Number of fruit punctured 



467 



Number of fruit free from injury 



Number of fruit 



2,705 

 3,172 



Per cent free from injury 



85.27 









Number of punctured and sound fruit, etc., 

 per tree in each plat. 



Total for 

 plat. 



Total per 

 cent fruit 

 free from 

 injury. 





Tree 9. 



Tree 10. 



Tree 11. 



Tree 12. 



Tree 13. 





13, 129 

 3.656 

 ,,135 

 i791 

 b 5.43 



254 



140 



1,817 



1,957 



92.84 



1,429 

 769 



2,289 

 3,058 

 74.85 







10,302 



5,554 



26,897 



32,451 













Number of fruit free from injury 





















82.88 













PLAT V. UNSPRAYED. 





Number of punctured and sound fruit, etc., per tree in each plat. 





Tree 1. 



Tree 2. 



Tree 3. 



Tree 4. 



Tree 5. 



Tree 6. 



Tree 7. 



Tree 8. 



Number of puncture 



6,623 

 2,130 

 430 

 2,560 

 16.79 



6,230 

 1,595 

 106 

 1,701 

 6.23 



4,331 



948 



47 



995 



4.72 



10,068 



1,522 



16 



1,538 



1.04 



3,372 



999 



207 



1,206 



17.16 



9,527 

 2,299 

 202 

 2,501 

 8.07 



14,727 



2,724 



97 



2,821 



3.43 



4,714 



Number of fruit punctured 



1,070 



Number of fruit free from injury 



Number of fruit 



86 

 1,156 



Per cent free from injury 



7.43 









Number of punctured and sound fruit, etc., 

 per tree in each plat. 



Total for 

 plat. 



Total per 

 cent fruib 

 free from 

 injury. 





Tree 9. 



Tree 10. 



Tree 11. 



Tree 12. 



Tree 13. 



Number of punctures.. . . 



6,143 



1,936 



387 



2,323 



16.65 



8,707 



2,117 



141 



2,258 



6.24 



6,921 



1,605 



114 



1,719 



6.63 



5,984 



1,517 



91 



1,608 



5.65 



6,739 



1,750 



310 



2,060 



15.04 



94,086 

 22,212 

 2,234 

 24,446 





Number of fruit punctured , 





Number of fruit free from injury 



Number of fruit 







Per cent free from injury 



8.85 









All punctures, whether egg or feeding, are classed together under 

 " Number of punctures." The total percentage of fruit free from cur- 

 culio injury includes fruit entirely free from feeding and egg punc- 

 tures, and has no reference to injury from other insects, as the codling 

 moth or lesser apple worm. Curiously, in the Siloam Springs work 

 the one-spray block (Plat I) shows the maximum percentage of fruit 

 free from curculio attack, injury on the demonstration plat exceeding 

 in this regard that on the one-spray plat by 3.46 per cent. It should 

 be noted, however, that Plat IV was adjacent to the unsprayed block 

 (see fig. 2) and there was unquestionably considerable overflow of 



