16 
BULLETIN 911. U. S. DEPARTMENT OF AGRICrLTTRE. 
maximuni. and 6 the minimum. On sprayed foliage males were in 
the cocoons 16.S2 days as the average with 20 days as the maximum 
and 16 days the minimum period. Females were in the cocoons an 
average of 17.06 days with 27 days as the maximum and 13 days the 
minimum 
Table XXI. — Length of time in cocoon of 1.318 individuals of the first brood of the 
grape-berry moth. Sandusky. Ohio. 1917. 
Sex oi moths. 
Number 
ofmotns. 
Number of davs in cocoon. 
Average. MaTi-mum . "Nfini-rm 
Male 
Female 
Undetermined 
Total 
Cocooned on spraved ftdiag 
Male : 
Female 
Total . 
226 
1.003 
25 
15. 52 
14.62 1 
14.32 | 
32.1 
32 
20 ! 
9 
6 
9 
1.254 
14.78 
32 
6 
11 
53 
16.82 
17.06 j 
27 
18 
13 
1 
17.01 i 
2; 
13 
TIME OF EMERGENCE OF FIRST-BROOD MOTHS. 
Table XXII. — Thru of emergence and sex of the first-brood moths of the grape-berry 
moth. Sandusky. Ohio. 1917. 
Date of emer- 
Number ofmotns. 
1 Date of emer- 
gence. 
Number ofmotns 
• . 
gence. 
3 
n fl 
Total. 
* 
2 I 
Total. 
J ulv 29 . 


1 
2 
4 

1 
4 

2 
7 
2 
20 
19 
24 
10 
21 
19 
6 
23 
IS 
13 
9 
5 
1 
1 
1 
8 
S 
9 
4 
13 
.: 
:: 
:: 
40 
5 
28 
33 
50 
16 
86 
130 
160 
54 
106 
72 
62 
130 
SO 
83 
54 
32 
big. 26 
s 
12 
7 

14 
50 3 
50 
'30 
1 
6 
5 
4 
3 
12 
8 
16 
20 
33 
5 
25 
26 
43 
14 
66 
110 
128 
41 
S5 
49 
55 
105 
61 
,66 
27 

1 
1 
1 
1 




3 

1 




1 
S 
3 

4 
1 
o 

4 
1 

27 
65 
31 
2x 
45 
3 
23 
1 


1 
1 
1 



2 















53 
Aug "> 
OO 
3 
2 
30 
37 
3 
31 
4 27 
5 31 
2 27 
32 
s 
Sept. 1 
37 
2 
30 
6 
7 
S 
9 
3 
4 
5 
6 
10 

! 
i 
4 
1 

I 

23 
6 
3 
20 
5 
B 
14 
7 
2 
3 
2 
1 
33 
6 
S 
26 
10 
6 
n 
8 
9 
9 
12 
IS 
13 
10 
11 
12 
8 
14 
2 
15.. 
4 
16 
13 
14 
15 
17 
IS 
4 
17 
1 
18 
2 
i 
3 
19 
1 
20 
1 

1 
2 

4 
1 
2 

1 
5 
21 
19 
1 
99 
20 
3 
23 
21 
2 
24 
22 
1 
Total 
316 
1.412 j 
1,769 
First-brood moths began to emerge on July 29 and emergence 
continued until September 22. It will be seen in figure 2 that the 
emergence was high for the entire period of August 12 to 28. varying 
with the mean daily temperature. It is also shown that the emergence 
