SPRAYING PEACHES. 95 
the same treatment received by the Elbertas. In order to deter- 
mine the commercial results the crop from 70 sprayed trees and the 
same number of unsprayed trees was graded at the packing house. 
It was found that 85 per cent of the sprayed fruit was merchant- 
able, leaving 14.98 per cent unmerchantable. Only 6.49 per cent 
of the unsprayed fruit from 70 trees was merchantable, 93.51 per 
cent being totally unfit for market. This shows a gain from spraying 
of 78.53 per cent. This great loss was due to the combined effect 
of the curculio, brown-rot, and scab, although the latter was the 
most. prominent trouble. These commercial results show conclu- 
sively that even under severe conditions the combination treatment 
will effectually control these troubles. 
It will be understood that the combination treatment for these 
diseases and curculio is in effect a compromise. Considered only 
from the insect standpoint, an additional application of arsenate 
of lead would be desirable, but a third application of the poison 
is as arule unsafe. Nevertheless, the benefits from two applications 
of arsenate of lead has been very marked. In order to show more 
in detail the effect of two such treatments on the curculio, Table VI 
is presented, showing the results of an examination for curculio in- 
festation of the dropped fruits during the season, as well as those on 
the trees at picking time, 12 trees in the sprayed block and 12 trees 
in the unsprayed block being examined. 
TaBLE VI.—Results of spraying Elberta peaches for plum eurculio, Baldwin, Ga., 1910. 
| ec Fruit from tree. Total 
a I * Eis Total | num- 
at ; 7 num- | berof | Sound 
No. | Treatment. Tree No Total | Num- | Total | Num- | ber of | fruit fruit.l 
num- | berin- | num- | ber in- | fruits. in- 
ber. | fested. | ber. | fested. fested. 
lainey 
Per cent. 
| 1 447 7 589 26 | 1,036 33 96.81 
: Eph a 2 119 8 465 45 | | 584 53 90. 92 
1 | First application, Apr. 7-8, 3 177 10 388 63 565 75 86.72 
arcuate cf lead, pounds 4 363 24| 606 76| 969 100 88. 63 
to~50 gallons of water, 5 161 10| 335 61 496 71 85.68 
second application, 2 6 96 12 409 96. || 505 38 92. 47 
ounds of arsenate of 7 99 9 358 38 457 40 91.23 
ead in self-boiled lime- 8 999 29 993 Be 515 55 89. 39 
sulphur wash  (8-8-50), 9 702 25 412 123 | 1,114 148 86.71 
Apr. 27-28; third appli- 10 224 6 476 83 700 89 87.28 
cation, lime-sulphur il 68 7| 410 50| 478 57 88. 07 
A Oa One 12| 348 17| 456 re 0 90. 67 
Total .| 3,026 150 | 5,197 684 | 8,223 ror Aen 
1 188 115 324 78 512} 293 42.77 
2 187 83 385 132 572 215 62. 41 
3 147 85 280 155 427 240 43.79 
4 839 14 648 939 | 1,487 353 76.26 
| 5 76 56 129 79 205 135 34.14 
| 6 605 165 471 189 | 1,076 354 67. 10 
- 7 192 71 177 94 369 165 55.28 
Pa iUet ren ted a a= enna 8] 318 55| 299| 147] 617| 202 67.26 
9 68 67 388 251 456 318 30.26 
10 143 67 176 137 319 204 36.05 
ia 214 110 347 231 561 341 39.21 
12 274 100 283 168 557 268 51.88 
Total .| 3,251 | 1,088 | 3,907| 2,000| 7,158] 3,088 |.......... 
1 The average of sound fruit on treated trees was 89.85 per cent; on untreated trees, 56.85 per cent. 
440 
