ONE-SPRAY METHOD FOR CODLING MOTH, ETC. 127 
Taste VI.—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. 
ING aDUNCUINCS eric eases octet scccme 1, 293 562 773 98 430 432 | 1,025 877 
No. fruit punctured......:........-.. 746 301 437 74 266 200 498 467 
No. fruit free from injury...........-. 2,790 1,589 | 4,639 1,591 2,879 1, 465 1,998 2,705 
MON INOIG eect ecmaccasces oosceees seas 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 
s n n it, ete., per tree in each plat. 
Number of punctured and sound fruit, 10) ee in each plat Motllger 
Total for | cent fruit 
plat. free from 
| Tree 9./Tree 10./Tree 11.) Tree 12. | Tree 13. injury. 
INOMpPUNeUUTeS!. «ene teeeetec lsc see 3, 129 plage Nal ace Lec: ad) | bey eget tel pho heey 103025) seers 
No. fruit punctured.................- 1, 656 140 (ACS Ree eee eee eee D004 lhe once 
No. fruit Free (OMMINUTY~- e422 Oyo) mle olga ea eOOn |e aa eel. sae 268971 sete eee 
INQ SRULI ln xtores pesos te oats Soa esis eee AO Ue LOD ial) wo 0oe| ees sos = Seer So; 450i oe oh eee 
Per cent free from injury.......-..... GONaS a le eeas ie We Aaeoi | sacs eee sees oa eee meee 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. 
INO SOUENLG GUE Serer ee el =a is 6,623 | 6,230 | 4,331 | 10,068 | 3,372 | 9,527 | 14,727 4,714 
INOsiguiiapunchined ise: encase -— 2,130 | 1,595 a | 1,522 999 | 2,299 | 2,724 1,070 
No. fruit free from injury.........-.. 430 106 A 16 207 202 97 86 
IN GMIRUE Seems oa ke clnaeisie new esine 2,560 | 1,701 oe 1,538 | 1,206 | 2,501] 2,821 1,156 
Per cent free from injury-.-..--- Bara 16.79 6.23 | 4.72) 1.04 | 17.16 8.07 3. 43 7.43 
| 
Number of punctured and sound fruit, etc., per tree in each plat. 
Total per 
Total for | cent fruit 
| plat. free from 
Tree 9./Tree 10./Tree 11.) Tree 12. | Tree 13. injury. 
pe NO SAD UINCUIMGS Ee eerie as ce a 6,143 } 8,707 | 6,921 5, 984 6,739 940860 Eaa ames 
No; inurl punctured -~--.--- 2... --.-- 1,936 | 2,117 | 1,605 1,517 1,750 22R2ND once ae eee 
No. fruit free from injury............. 387 141 114 91 | 310 Pe AT: ieee eae te 
10 yg ER a a ZeaDa |e 2OsSe LTO, | LSG08N | 22060 | 24 au I ne 
Per cent free from:injury............. 16. 65 6. 24 6. 63 5. 65 | 15 045| Cees. 8.85 
All punctures, whether egg or feeding, are classed together under 
‘Number punctures.” The total percentage of fruit free from curculio 
injury includes fruit entirely free from feeding and egg punctures, 
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 
