90 
THE PLUM CUKCULIO. 
Table XLVI. — Effect of moisture on transformatioyxs of the plum curculio in the ground, 
Barnesville, Ga., 1910. 
SOIL KEPT NORMALLY MOIST. 
Jar No. Larvae. 
Beetles 
emerging. 
Average 
time in soil. 
Per cent 
emerging 
as adults. 
I 
16 
15 
12 
11 
13 
8 
12 
11 
14 
Days. 
25. 53 
25.50 
25. 27 
26.15 
28.12 
25.91 
24.00 
23. 35 
93.7 
II 
13 
11 
17 
8 
1.5 
12 
14 
92.3 
V 
100.0 
VI 
76.5 
VIII 
100.0 
XI 
80.0 
XIII 
91.7 
XVII 
100.0 
Total 
106 
96 
90.56 
SOIL AT FIRST MOIST, RUT ALLOWED TO DRY OUT. 
XII i 
15 
12 
14 
12 
5 
2 
3 
2 
8 
3 
27.50 
25.66 
2S.00 
26.37 
26.66 
13.3 
XIV 
25.0 
XV 2 
14.3 
XVI 
66.6 
XVIII 
60.0 
Total 
58 
18 
31.03 

SOIL DRY 
III 
13 
10 
17 
9 
12 
None. 
None. 
None. 
None. 
None. 
IV 
VII 
IX 
X 
Total 
61 
i Soil watered 34 days after entering of soil by larvae, 9 more beetles promptly appearing. 
2 Soil watered 36 days after entering of soil by larvae, one beetle appearing the following day. 
In the series of jars with normally moist soil, a total of 106 larvae 
was used, yielding 96 adults, or 90.56 per cent. In jars where the 
soil was allowed to dry out, and without further watering, a notice- 
able decrease in the number of adults emerging is shown. From a 
total of 58 larvae only 18 adults, or 31.03 per cent, developed. Where 
dry soil was used no adults whatever developed from the 61 larvae 
used. 
Four wooden boxes, 10 by 12 by 8 inches, were used in a more 
extensive test. In two of the boxes ordinary Georgia red clay was 
used, one being kept moist, while the other was dry but w T as subse- 
quently watered as stated in the footnote. In the other two boxes 
a sandy loam was used, one being kept moist and the other dry. 
The soil in all boxes, however, was moist at the time the larvae were 
put in, to enable them better to establish themselves. The boxes 
were covered with wire screen and kept out of doors protected from 
the sun. (For detail, see Table XL VII.) 
