SPRAYING FOR CURCULTO OX 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 suiTOunding 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.) 
Table XCVIII. — Results of spraying apples for the plum curculio, Crozet. Va.. 1 
Plat 
No. 
Treatment. 
Variety. 
Tree 
Xo. 
Total 
num- 
ber of 
apples. 
Total 
nimi- 
ber of 
apples 
punc- 
tured. 
Total 
num- 
ber of 
punc- 
tures. 
Per- 
centage 
ofsound 
apples. 
Aver- 
age per- 
centage 
ofsound 
apples. 
I 
Four applications Bordeaux mix- 
1 ture (2-2-50) plus 2 pounds ar- 
senate of lead: Apr. 27, May 24, 
[ June 2(5, and July 20 and 27". 
("One spraying only, drenched with 
1 Bordeaux mixture (2-2-50) phis 
| 2 pounds arsenate of lead, Apr. 
1 -'7. 
Untreated 
1 Xe wto \v n 
f Pippin. 
L..do 
do 
1 
2 
3 
4 
5 
6 
7 
8, 
1 
2 
3 
4 
5 
6 
7 
S 
1 
2 
3 
4 
5 
6 
7 
8 
802 
1.459 
719 
2.415 
2,082 
1,308 
3.014 
2,328 
115 
187 
103 
345 
463 
114 
_ 1 
252 
157 
.-- 
163 
524 
162 
395 
2S 
B7. 18 
85 1 
B5. 71 
77.21 
91.28 
91.14 
B9. 17 
14.077 
1,846 
2.072 
86.89 
II.... 
2.57S 
2,533 
5. 105 
1.31s 
3,245 
1 . 979 
2.041 
2.039 
901 
730 
1.347 
. S 
719 
405 
521 
511 
1.510 
1,290 
2.143 
360 
1,095 
775 
823 
71.17 
73. 61 
81.94 
77.84 
79. 53 
74.47 
74. 93 
5,432 
8,643 
73.93 
nr... 
3,682 
816 
1,016 
3.111 
2,988 
5 
2,001 
1,255 
1,571 
437 
531 
1,415 
1,193 
1,098 
1 . 285 
2.746 
2,571 
705 
962 
2,490 
1,939 
i . a 5 
2,300 
63.33 
57. 33 
46. 45 
47. 73 
54. 52 
60. 00 
41. 54 
38. 54 
19.107 
15,578 
■ - 
