126 DECIDUOUS FRUIT INSECTS AND INSECTICIDES. 
THE PLUM CURCULIO. 
Throughout the season the drop-fruit and the fruit on trees at 
picking time from four of the plats in the Jones orchard were care- 
fully examined as to injury by the plum curculio. The results of 
examinations are given in detail in Table VII. 
Taste 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. 
PLAT I. ONE-SPRAY. 
Number of punctured and sound fruit, ete., per tree in each plat. 
| | 
Tree 1. | Tree 2. | Tree 3. | Tree 4. | Tree 5. | Tree 6. Tree 7.| Tree 8. 
Number of punctures’ 3-2. 22---- = 1,979 | 1,713 | 2,613 683 268 | 1,012 | 638 1, 200 
Number of fruit punctured........-- 1,179 915 687 387 208 532 370 706 
Number of sound fruit............--- 4.510 | 3,898 | 3,109 | 2,363) 3,238) 3,286) 2,937 4,737 
Nim berio finite ss ee eee eee 5,689 | 4,813 | 3,796 | 2,750) 3,446 | 3,768] 3,307 5, 443 
Per cent free from injury........--.-- 79.27 | 80.98 | 81.90 | 85.92) 93.96 | 85.88 | 88.81 87.02 
Number of punctured and suune fruit, etc., Total per 
er tree in each plat. 
P BS Total for | cent fruit 
plat. free from 
Tree 9. |Tree 10./Tree 11.) Tree 12. | Tree 13. | TOT Ya 
Number’of punctures: -------- 252. -- 642 319 (GU es Se ans ee aeeerne oc 117095) eee eee 
Number of fruit punctured........... 364 216 B8bu| Gost a seele eee e899) |e. eee 
Numberof sound fruit. =o... 22-2. Se 280i ree 436ale 43. 000N pase earoes |e eaeaeee 37: S040 eee ee ee 
NimiberOfiniultosee. css. -e n= a 3,644) 22 6b2 |) oR SOon emery crpapa| ec ae aerats |, 43; 203) |s-eusensoe 
Per cent free from injury........----- SOKO GUMS heron S ON emreese eee Scere slates eee eae iees 86. 34 
PLAT III. ONE-SPRAY. 
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 punchures 22. <5 ccm ie= 2,321 721 919 788 560 | 1,790} 1,756 732 
Number of fruit punctured.......-..-- 1,051 349 533 368 358 795 727 372 
Number of fruit free from injury... -.- 3,698 | 2,339 | 2,211 | 2,284) 1,888] 2,775 | 2,154 1, 620 
INUIM ber Of inUliz epee. sae ees 4,749 2,688 | 2,744 2, 652 2,241 3,570 | 2,881 1, 992 
Per cent free from injury.......-.---- 77.86 | 87.01 | 80.57 | 86.12] 84.02] 77.73 | 74.76 81.32 
Number of punctured and sound fruit, etc., Tomiper 
er tree in each plat. 
P ; P Total for | cent fruit 
plat. | free from 
Tree 9. Tree 10./Tree 11.) Tree 12. | Tree 13. any 
Nim ber of punctures! 2. o22 s.<---- ea pO (s24 le Perea As he ol Ie eg SS IL DIG: eee Sees 
Number of fruit punctured.........-- YR ee ae Ge neet eae ee mr Geert nee 5) 280) ||acogeee 
Number of fruit free from injury.....- ANA O33 | EPC 2 ole errctess eal ls rete eyo | eee eee 20) 4570 steerer 
NGM ber OL: ANU esr ae ss v5) lataiers ota 2990 Wav Seis cakes ol hare Samrat leer Seeger PARE Sac sic = 35 
Percent free from injury .....-.-.---- 67425; Res ee alleeee cece | taasicoeee leer eel oer | ee ementaets 79. 48 
a 
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