20 
BULLETIN 14*2. U. S. DEPT. OE AGRICULTURE 
than the dust, as recorded in Table 8 for Plats I and VII. The 50 
per cent sulphur dust used on Plat VII gave a somewhat better con- 
trol of brown rot than the SO per cent sulphur dust used on Plat VI. 
but not nearly so good control of scab. 
Scab was quite prevalent in this orchard in 1923. The fruit har- 
vested from the check plat was 92.5 per cent scabby, although the 
individual fruits were not so severely attacked as in northern or- 
chards. Brown rot was moderately severe, as indicated by 30.6 
per cent of rotten fruit from the check plat. 
Tables 11. 12, and 13 give, in percentages, the results of the experi- 
ments in spraying and dusting conducted on the Elbert a variety 
during the season of 1923. Table 11 gives the data obtained from 
the examination of the fruit harvested from the record trees, Table 
12 the percentages of curculio infestation of the ''drops" from the 
record trees in each plat, and Table 13 brings together the com- 
mercial results, in merchantable and cull fruit, from all the trees in 
each plat. 
Table 11. — Summary of results of experiments in peach dusting and spraying at 
Fort Valley, Ga.. in 1923; fruit harvested from record trees of the Elberta variety 
Percentage of total fruit having— 
i 
Percentage 
of total 
Curculio larvae 
and— 
- VT3 
fruit as 
graded be- 
fore being 
opened for 
examina- 
Plat 
-9 
= 
= 
- 
= 
= 
Si 
X 
> 
Is 
_z 
1 
= 
>> 
"a 
o 
t 
a 
= 
- 
— 
o 
X 
■o gSpS 
O on 
c 
s 
a 
tion 
o 
| 
-9 
X 
| 
I I 1 
ea 
— 
B 
3 
I 
1,827 
1,661 
1.354 
1.164 
630 
912 
1.932 
1.407 
580 
6. 1 1. 
-:. " :. f 
- : l.o 
7. 2.5 
3. 3. & 
16.2 1.-- 
7.3 
2S.2 11.9 
5.1 1.8 
8.6 
10.0 
6.0 
13.9 
7.0 
24.5 
44.1 
67.0 
3.1 
5.1 
4,1 
7.0 
'.: 
2.7 
11.2 
"&8 
46 
1.0 
1.2 
La 
2.5 
1.9 
44 
3.6 
1.4 
7.6 
1.0 
85.3 
845 
86.1 
78. 6 
91. 7 8. 3 
n 
9.5 
4.8 
12.2 
6.0 
19.0 
41.2 
4:. 5 
2.6 
.4 
1.1 
1.0 
0.1 
.1 
.7 
1.0 
.7 
2.9 
3.8 
.2 
0.2 
91. 9. 
in 
90. 8 9. 2 
IV 
.3 
59. 3. 10. 7 
V 
.3.. 87- 5 
90.3! 9.7 
VI 
vm 
0.3 
0.2 
42 
0.3 
62.2 
51. 5 
18.6 
90.7 
89. 1 10. 9 
84 16. 
VIII- 
IX 
.6 
.9 
14 9 
.3 
1.1 1. 9 
.2 
69. 1 30. 9 
- : 11. 5 
. 
■ N : records of curculio infestation taken on this plat. 
3 Check plat: X ot sprayed or dusted. 
Table 12. — Number of peaches dropping from Elberta peach trees, and percentage 
of those infested by curculio, in experimental orchard at Fort Valley, Ga.. 1923 
Total per- 
Total 
centage of 
Plat 
number of 
drops in- 
drops 
fested by 
curculio 
I 
2.627 
5.2 
n 
- - 
43 
in 
2. 629 
2.1 
IV 
1.269 
7.9 
v 
1,257 
8.9 
VI 
1.650 
12.1 
VIII 
- " 
16.1 
IX 
934 
2.6 
