ONE-SPRAY METHOD FOR CODLING MOTH, ETC. PA 
Taste VII.—IJnjury 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. 
Nunmtber of punctures... .5 2. 22 a. oc. 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 otiinitt:- +. 2. ei ee eo toe 3, 536 1,890 5,076 1, 665 3,145 1, 665 2,496 3,172 
Percentitree irom) injury). ese. - 78.90 | 84.07 | 91.39} 95.55 | 91.54] 87.98 | 80.04] -85.27 
Number of punctured and sound fruit, etc., opal per 
r tree in each plat. 
BE P Total for | cent fruit 
plat. free from 
Tree 9. |Tree 10./Tree 11.) Tree 12. | Tree 13. ayET Y= 
Number of punctures 2.2... ..55:5--.- 13, 129 Dae ee AZO ek cient al aes See LO; S02 eee 
Number of fruit punctured............| 3,656 140 MOO! Rese cues asec ence yt al |e se see 
Number of fruit free from injury ..-.-- lol. CListeiliZ( ie Parekh LA erica el lene es Sra 26,897), |e! eee 
INGE ROLE one cee ce eee eee 4 791 1,957 SRODSE eee See |e Sete te aye S245) see 
Per cent free from injury.............. OF AST ee GQESA iu 7Ae Sin [pe ah aetna ORE ES Mets te te 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. 
NEM er Of PUNEHIOe ces ee asses 2s 6,623 | 6,230 | 4,331 | 10,068 | 3,372 9,527 | 14,727 4,714 
Number of fruit punctured .......... 25,130))| 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 
Nom bemohiruiliwe se kee eee 2,560 | 1,701 995 | 1,538} 1,206] 2,501 | 2,821 1,156 
Per cent free from injury .. -.&....2..- 16. 79 6. 23 4.72 1.04 | 17.16 8. 07 3. 43 7.43 
Number of punctured and sound fruit, etc., memes 
er tree in each plat. k : 
P Us Total for | cent fruit 
plat. free from 
Tree 9.|Tree 10./Tree 11.| Tree 12. | Tree 13. BEY 
WNumiber of punctures. 9 25..2.260245- 6,143 | 8,707} 6,921 5, 984 6,739 94° 086) eee seas 
Number of fruit punctured..........-. 1,936 | 2,117 | 1,605 1,517 1,750 PPA rs Bora se 
Number of fruit free from injury... .. 387 141 114 91 310 POR LIS (Mn Geeeete 
INUTO ber Of tntlliteness cmos seasons 2,323)| 2,258 || 1,719 1, 608 2,060 24446 |e sono £6 
Per cent free from injury...2. 2.22.2... 16. 65 6. 24 6. 63 5. 65 OY el ee ea 8.85 
4 
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 
