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 VI. 
TaBLe 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. 
PLAT I 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. 
INOSIDUNGhUTeS = at rs «hues -aeezaee ele 1,979 Mets) 2,613 683 268 1,012 638 1, 200 
No sini punchuredscassemee ee sean e 1,179 915 687 387 208 532 370 706 
INO} SOUNGHTEUIG! Bcncee toceeenaotee cee 4,510 |} 3,898 | 3,109 | 2,363 | 3,238 | 3,236] 2,937 4,737 
INO RUGS eee ee oe net ech Steere 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} 98.96 | 85.88 | 88.81 87.02 
Number of punctured and sound truit, ete. per tree in each plat 
Total per 
Fe te a = eee = Total for | cent fruit 
plat. free from 
Tree'9. Pree 10)/Tree 11:|| Tree 12: || Trees. injury. 
INOMMUNCTULeSER secre nee ameter eee ane 642 319 642) nes hoe Seeek cece DL 709) | eee 
Non iruit punctured << 2.2 2-s2s4-2s-5- 364 216 B80 seeweacem alae cem sees 3809) |e een 
Notsoundiruiteee sens scoe ne eee ss Sy ePe SION! Aakalel)Sescen-aeellSacosoaeo 373043 o setae 
INOMINUITR ee See eee eee eines 35 0449/9525 00a May OO0) Emenee faecal ee case eee 43 (203))| eawaen sere 
Percent tree fromvinjury-o+--4--- --=- SOOTY Wr OU SSh | Od aOs |e as alesse or t| eee eee 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. 
Nos puncbures! set ceessee-en= Sie ermine 2,321 721 919 788 560 1,790 1,756 732 
Nominmitpuncturedse-ses-.54- 4. sos" 1,051 349 533 368 358 795 727 372 
No. fruit free from injury........-.-- SNOOS eos cena I SDR 1,883 ; 2,775} 2,154 1, 620 
INOSIDUUIL Sore cten aeeeeee ie Meaney 4,749 | 2,688 | 2,744] 2,652 | 2,241 | 3,570] 2,881 1,992 
Renicentree ing many Uy oe ane 77.86 | 87.01 | 80.57 | 86.12] 84.02 | 77.73 | 74.76 81.32 
Number of punctured and sound fruit, etc., per tree in each plat 
Total per 
= ot alsfor! cent trntt 
plat. free from 
Tree 9.|Tree 10.|Tree 11.) Tree 12. | Tree 13. injury. 
INO DUN Chests. ee seer ere ey 1 G20 3 | eseseepsetel | erat tl totes Botta eae DDG ale nae 
No. truitepunctured! 2. ooo. ese TPH el Skeceschce 5 4 See en ae ae ental sera aoe ers hs 280) | eae eres 
No: fruit free from injury,..-.-..=--+-- 1408 eee reel ee essa Bess Lire em eee 20457) || erste Pee 
Wosuraitgs4.t3 ies estes Lesage 25 2205 |b,. 23a. MAR ee eobes ween ete 2b; ital) |e == aeeeee 
Per cent free from injury.......-..--- 67:25:42 elon | escent S| ccecis santo soe eee ea em eerscet 79. 48 
