ONE-SPRAY METHOD FOR CODLING MOTH, ETC. 127 
Tasie 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. 
Number of punctures................- 1, 293 562 773 98 430 432 | 1,025 877 
Number of fruit punctured..........- 746 301 437 74 266 200 498 467 
Number of fruit free from injury......| 2,790 | 1,589] 4,639] 1,591 | 2,879] 1,465] 1,998 2,705 
Number Of fruit; socasco sce mscrannis ace > 3,536 | 1,890] 5,076} 1,665] 3,145] 1,665] 2,496 3,172 
Per cent free from injury........-...-- 78.90 | 84.07] 91.39] 95.55] 91.54] 87.98] 80.04 85. 27 
Number of punctured and sound fruit, etc., 
er tree in each plat. Total per 
P i P Total for | cent fruit 
|)-$ | plat. free from 
Tree 9.|Tree 10.|Tree 11.| Tree 12. | Tree 13. POLE 
Number of punctures .............--- 13,129 DOAN als A2ON --, clarctomates| setae anes 10: 302) | fasmeseeice 
Number of fruit punctured...........-| 3,656 140 (hit Ee ee aa ee ae Fat al | eee oes 
Number of fruit free from injury ...--- ROOM rele Slate 2 sou | eels aerate al eiaiatetstetercte = 26; 897) |eaea eens 
Nrmiberetfriit. <-\.4. 225522. 8 ik 4 791 IPOS Ta): eo ODSu tec e ese see|ats eee 2 S23451 is Fee ee eee 
Per cent free from injury............-. CHAS Al OONS4a |i TAU ODIs setts Ao on | Ree mai 82. 88 
PLAT V. UNSPRAYED. 
i 
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. 
WNuniber of pumeture. oc... 2.5. .22.---- 6,623 | 6,230 | 4,331 | 10,068 | 3,372 | 9,527 | 14,727 4,714 
Number of fruit punctured .......... 2,180 | 1,595 948 | 1,522 999 | 2,299 | 2,724 1,070 
Number of fruit free from injury ... -- 430 106 47 16 207 202 97 86 
ING Derr aruibra. Seo ct abe ecicccte oes. 2, 560 1,701 995 1,538 1,206 | 2,501 2,821 1,156 
Per cent free from injury............. 16. 79 6. 23 4.72 1.04 | 17.16 8. 07 3. 43 7.43 
Number of punctured and sound fruit, etc., 
in each plat. Total per 
Betienge 1H eneh Dit Total for | cent fruit 
plat. free from 
Tree 9.|Tree 10./Tree 11.) Tree 12. | Tree 13. anJUrY- 
Number of punctures...............- 6,148 | 8,707 | 6,921 5, 984 6, 739 er Ne) eran eeone 
Number of fruit punctured.........-.. 1,936 | 2,117] 1,605 1,517 1,750 DON TADS | tte e ere 
Number of fruit free from injury..... 387 141 114 91 310 DpOSANE Fee 8 
Nam bersof iritits see ae one ereisins aces Qyd2e) |) 2i208. |) Lilo 1, 608 2,060 DAPAAGOIS Jaashedae 
Per cent free from injury.............. 16. 65 6. 24 6. 63 5. 65 15: 04m lbs peered ae 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 
