128 DECIDUOUS FRUIT INSECTS AND INSECTICIDES. 
of 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 
completes destruction. 
In Table VII 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 demon- 
stration 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. 
TaBLe VII.—E fect of treatments on the three principal fruit insects and total percentage 
of sound fruit. Siloam Springs, Ark., 1909. 
PLAT I. ONE-SPRAY. 
Character of injury. 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 
Injured 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)" 25-734 |) 25264 |) 35037 |) 3302351) 25655 4, 452 
Rotalmumber applests= 2: #22----=-.-- 5,689 | 4,813 | 3,796 | 2,750 | 3,446] 3,762 | 3,307 5, 443 
Weaale Total 
ota er cent |/per cent 
Character of injury. ae ate ae Tree Tie for |freefrom| free 
: 5 z re : plat. | injury. | from 
injury. 
Injured by plum curculio...........-. 364 216 SOD4 eresteeclteemee 5,899 86534) [De ccweme 
Injured by codling moth...........-- 110 113 TOU 2s ee ee 3, 120 UPAIC® Seem caG 
Injured by lesser apple worm.....-.--- 10 5 DW BeaecH Sanasne 309 Ses | Sees 
Number injured apples...........-..- 473 349 C6, Beeeeee| Saeeses pits) Eaosoncors bouscade 
Number uninjured apples. .--..--.-.- By L26u 225303) |) Voi 4aai leno ese nleeemeee 345348) lors feSee 79. 60 
Totalimumiber apples). 2... 4-2-5 -e== 8,599 2 ODD Os OOD! Hsoncioieris| arose 43) 152) |. <.cisecccta/erl| Sacrgeieere 
PLAT III. ONE-SPRAY. 
Character of injury. | 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............-. 397 298 286 431 321 247 231 200 
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 
