SPRAYING FOR CURCULIO ON APPLE. 197 
EXPERIMENTS IN VIRGINIA. 
Experiments in Virginia during 1909 were carried out in two 
localities, namely, at Crozet, in the orchard of Mr. W.S. Ballard, and 
at Mount Jackson, in the orchard of the Strathmore Orchard Co. 
Orchard of Mr. W. S. Ballard.—This orchard is located in the eastern 
foothills of the Blue Ridge and is composed mostly of the Yellow 
_Newtown variety, which sort was used exclusively in the experiments. 
The surrounding trees not used in the experiment were sprayed by 
the owner. This work formed part of the ‘“one-spray’’ experiment, 
and especial attention was given to determining the effect of the 
treatments in lessening curculio injury. Four applications gave a 
percentage of 86.89 sound fruit as against 54.02 on the untreated 
trees, a difference of 32.87 per cent. One single drenching applica- 
tion protected from the curculio to an extent of 73.93 per cent, an 
improvement over the check of 19.91 per cent. (See Table XCVIII.) 
4 
| 
TaBLE XCVIII.—Results of spraying apples for the plum curculio, Crozet, Va., 1909. 
Total ? . 
Total | num- sul Per- fe ae 
Plat ; peta nti Tree | num- | ber of , | centage] “o- Fe” 
re Treatment. Variety. No. | ber of | apples ber of Besound centage 
apples. | punc- | PY | apples. |ofsound 
"| tured. | tures. PR apples. 
1 802 115 15K |) 285166 kee - 
2) 1,459 187 LOW Siew Peace oss 
Four applications Bordeaux mix- 3 719 103 TGS | SonOla |p aces 
I ture (2-2-50) plus 2 pounds ar- ||\Newtown 4) 25415 345 Dede Oo ile eee ae 
senate of lead: Apr. 27, May 24, Pippin. 5 | 2,032 463 GOSH 27.21) Es as ns = 
June 26, and July 26 and 27. 6] 1,308 114 162) lo QU 28% [he 2 
7} 3,014 267 395) || Mista be sess oe 
8 | 2,328 252 PASS leetess Hel lig (ee Aa 
VASO7 7, 1846) | 25672) | o:'- 2 &6. 89 
1 2,578 961 1,510 G2 57 2HE Soon eee 
2| 2,533 HoOh|| Ab 2oO lh taeda we ae 
One spraying only, drenched with SueosOoe ls ust lee asall wrosol ene a ee 
II Bordeaux mixture (2-2-50) plus ale 4] 1,318 238 S60) | SlaOa Ee = see 
>>|)’ 2 pounds arsenate of lead, Apr. |(7>"> ~~ >>> >>> 5] 3,245 MOT | TS O95) | Wire 84 |b = cee 
‘ 27. 6] 1,979 405 647 kt Se | eee 
7 2,041 521 775 MAGI? |B oe ae 
8} 2,039 511 URE EACR. | Seeeseee 
20,838: | 5,432 | 8,643 }_......- 73. 93 
1 3,423 1,255 2,746 ae Sl peeeoees 
21 3,682) VU, 57 | 2,571 HYERE I Paeedace 
3 816 437 Odie Abs 45 Es eae 
+ 4 1,016 531 962 yA By See oe ee 
IIT...| Untreated..-.....--.---++-.2--+--]----+ do...... 5| 3,111| 1,415| 2,490] 5452 ]........ 
6 2,988 1,193 1,939 GOROGL IEE ee 
tf 1,980 1,098 1,865 Ett: sy See ee 
8 2,091 1,285 | 2,300 Be hb7 et eee 
19,107 | 8,785 | 15,578 |........ 5A. C2 
