128 DECIDUOUS FRUIT INSECTS AND INSECTICIDES. 
curculio, as on this latter the beetles were quite abundant, as shown 
by the low total percentage of uninjured fruit, namely, 8.85 per cent. 
In view of the habits of the curculio in ovipositing and feeding over 
a considerable period (six to eight weeks or more), the results from 
the one-spray method are the more surprising, and it would appear 
that the single treatment resulted in their almost complete destruction. 
In Table VIII are brought together data showing the effects of the 
treatments in the control of the three principal insect enemies of the 
fruit, namely, the codling moth, the plum curculio, and the lesser 
apple worm (Enarmonia prunivora Walsh). The value of the one- 
spray method is here put to the severest possible test so far as con- 
trolling insect enemies of the fruit is concerned. It will be noted 
that when these three insects are taken into account somewhat better 
results were secured from Plat IV, which received the demonstration 
treatment, namely, 81.19 per cent sound fruit, as against 79.60 per 
cent sound fruit from the one-spray plat. The unsprayed plat (V) 
shows a very low percentage of fruit free from injury by these three 
insects, namely 6.94 per cent. 
TasBLeE VIII.—E fect of treatments on the three principal fruit insects and total percentage 
of sound fruit. Siloam Springs, Ark., 1909. 
PLAT I. ONE-SPRAY. 
Tree 1. | Tree 2. | Tree 3.| Tree 4.| Tree 5. | Tree 6. | Tree 7. | Tree 8. 
| 
Injured by plum curculio.........-.. 1,179 915 687 387 | 208 | 532 | 370 706 
Injured by codling moth...........-- 703 522 | 419 118 181 | 222 | 286 315 
Tnjured by lesser apple worm....-.-.- 71 74 | 41 6 31 7 | 19 30 
Number injured apples......-...---- 1,778 | 1,403 | 1,062 486 409 739 652 991 
Number uninjured apples. .......---- 3,911 3,410 | 2,734 | 2,264 3, 037 3,023 | 2,655 4, 452 
Total mumberapples's--------------- 5,689 | 4,813 | 3,796 | 2,750] 3,446 | 3,762] 3,307 5, 443 
eeaniee Total 
- ota er cent /per cent 
ae ae nie are nee for | free from e free 
: plat. | injury. | from 
injury 
Injured by plum curculio.......-.-.-- 364 216 C315) Beee sa Maemmrsc 5, 899 86:34"). -22eke = 
Tnjured by codling moth. ...---.....- 110 113 ISP \ess.5e2|eese42 3, 120 O25 74 ||. aetna 
Injured by lesser apple worm. ....--- 10 5 Ei eet tal Pst ner 309 99,29) || Seen 
Number injured apples......---.-.--- 473 349 60h See enlace ae 8; 802 Ist 5 enol eeeeee 
Number uninjured apples.......-.--- B26) 2.80) || 23,438) atom oes! Se eaee 34,348 J. 2-2-2 mace 79. 60 
Totalimumiberapplese: —2---. eee ee ee Se) || ZHGEPT| SS HEY | coco s)he Sose= 43, V52)||ES== oes |S aeeeeee 
PLAT III. ONE-SPRAY. 
T ; 
Tree 1. | Tree 2.| Tree 3. | Tree 4. | Tree 5. | Tree 6. | Tree 7. | Tree 8. 
Injured by plum curculio.........-.- | 1,051 349 533 368 358 795 727 372 
Injured by codling moth. ............ 397 298 286 431 321 247 P81 200 
Injured by lesser apple worm......-- 29 19 14 32 | 40 22 26 12 
Number injured apples........-.---.-- 1, 363 525 772 806 684 | 1,010 919 551 
Number uninjured apples. .....-.-.-.-..- 3,386 | 2,960) 1,972 | 1,846] 1,557 | 2,560] 1,962 1,441 
Total number apples.......---..- -----| 4,749 | 3,485.| 2,744) 2,652) 2,241 | 3,570} 2,881 1, 992 
