SPRAYING PEACHES WITH ARSENICALS. 
211 
4 applications given Plat I, and the injury to Plat III was also so 
severe as to render unsafe such a number of applications. 
Table CV gives results of spraying Elberta peaches for the curculio 
at Baldwin, Ga., in 1910. (See PI. XIX.) These plats contained 
some 200 trees each and counts were made of fruit produced through- 
out the season on 12 trees from each plat. Two applications of 
arsenate of lead were made, the first in water and the second in the 
self -boiled lime-sulphur wash (see p. 212). At the time of the first 
application, April 7-8, the blossoms of the trees had just fallen. The 
unsprayed block (Plat II) yielded 56.85 per cent of sound fruit as 
compared with 89.85 per cent of sound fruit from the sprayed block, 
a gain of 33 per cent. 
Table CV. — Results of staying Elberta peaches for the plum curculio, Baldwin, Ga., 
1910. 
Fruit from 
Fruit from 
Plat 
No. 
Treatment. 
Tree 
No. 
ground. 
tree. 
Total 
Total p 
° um " f ceSt- 
btrof ~£" f 
f ™* Sfund 
feSed. fruit ' 
age 
per- 
Total. 
In- 
fested. 
Total. 
In- 
fested. 
ber of 
fruits. 
cent- 
age of 
sound 
fruit. 
f 1 
447 
7 
589 
26 
1,036 
33 96.81 
9 
119 
8 
465 
45 
584 
53 90.92 
I 
First application Apr. 7-8, ar- 
3 
177 
10 
388 
65 
565 
75 86. 72 
senate of lead 2 pounds to 50 
4 
363 
24 
606 
76 
969 
100 8S.63 
gallons water; second applica- 

161 
10 
335 
61 
496 
71 85.68 
tion, 2 pounds arsenate lead in 

96 
12 
409 
26 
505 
38 92. 47 
self-boiled lime-sulphur wash 
7 
99 
2 
358 
38 
457 
40 91. 23 
(8-8-50), Apr. 27-28; third ap- 
plication, lime-sulphur wash 
8 
222 
22 
293 
33 
515 
55 89. 32 
9 
702 
25 
412 
123 
1,114 
148 86. 71 
only (8-8-50), June 17-18. 
10 
224 
6 
476 
83 
700 
89 87. 28 
11 
68 
7 
410 
50 
478 
57 88.07 
I 12 
348 
17 
456 
58 
804 
75 90. 67 
3,026 
150 
5, 197 
684 
8.223 
834 j 
S9.S5 
f 1 
188 
115 
324 
178 
512 
293 
42.77 
2 
187 
83 
385 
132 
572 
215 
82.41 
3 
147 
85 
280 
155 
427 
240 
43.79 
4 
839 
114 
648 
239 
1,487 
353 
76.26 
5 
76 
56 
129 
79 
205 
135 
34.14 
u.... 
Untreated 
6 
7 
605 
192 
165 
71 
471 
177 
189 
94 
1.076 
369 
354 
16S 
67.10 
55. 28 
* 
318 
oo 
299 
147 
617 
202 
67.26 
9 
68 
67 
388 
251 
456 
318 
30. 26 
10 
143 
67 
176 
137 
319 
2H 
36.05 
11 
214 
110 
347 
231 
561 
341 
39.21 
I 12 
.'74 
100 
283 
168 
557 
268 
51.88 
3,251 
1.088 
3,907 
2.000 
7. 158 
The recent development, by Prof. W. M. Scott of the Bureau of 
Plant Industry of this department, of the self-boiled lime-sulphur 
wash as a fungicide for the control of brown rot and the scab of 
peach at once gave an enormous impetus to peach spraying. The 
desirability of combining arsenate of load with the self-boiled lime- 
sulphur wash led to many tests to determine its practicability. Such 
a combination, while resulting in important chemical changes, has 
in actual practice resulted in a spray which appears to be perfectly 
safe to peach foliage and fruit. Experience during the past 3 years 
