GRAPE-BERRY MOTH IN NORTHERN OHIO. 
LENGTH OF PUPAL STAGE OF FIRST-BROOD PUP^E. 
15 
Table XX. — Time of cocooning and length of pupal stage of 90 individuals of the first- 
brood pupae of the grape-berry moth, Sandusky, Ohio, 1917. 
UNSPRAYED FOLIAGE FOR COCOONING. 
Number of larvgp. 
Date of pupation. 
Date of 
moth 
emer- 
gence. 
Days in pupal stage. 
c? 
9 
S 
Total. 
3 
9 
§ 
3 
4 
8 
2 
1 
1 
2 
8 
1 
4 
2 
5 
5 
2 
1 
2 
1 
3 
4 
9 
11 
3 
1 
1 
3 
9 
1 
5 
3 
5 
7 
2 
1 
2 
1 
Aug. 4 
Aug. 16 
Aug. 18 
...do 

12 
14 
13 
14 
14 
15 
16 
12 
13 
14 
12 
13 
12 
13 
14 
11 
12 
16 
do 
2 
Aug. 5 
13 
14 
14 
3 
do 
Aug. 19 
Aug. 21 
Aug. 22 
Aug. 23 
Aug. 20 
Aug. 21 
Aug. 22 
Aug. 21 
Aug. 22 
...do 
1 
Aug. 7 
do 
do 
i 
Aug. 8 
1? 
1 
do 
13 
....do 
i 
Aug. 9 
1? 
1 
do 
13 
Aug. 10 
2 
do 
Aug. 23 
Aug. 24 
Aug. 22 
Aug. 23 
Aug. 27 
13 
do 
Aug. 11 
do 
do 
Average 
10 
59 
2 
71 
13.4 
13.11 
1? 
SPRAYED FOLIAGE FOR COCOONING 
Number of larvc\ 
Date of pupation. 
Date of 
moth 
emer- 
gence. 
Days in pupal stage. 
rf 
9 
§ 
Total. 
3 
9 
§ 
1 
1 
3 
2 
1 
1 
1 
i 
1 
1 
3 
2 
1 
2 
1 
1 
1 
2 
1 
2 
1 
Aug. 8 
do 
Aug. 21 
Aug. 22 
Aug. 23 
Aug. 24 
Aug. 25 
13 
14 
14 
15 
16 
13 
14 
12 
Aug. 9 
do 
.....do 
1 
Aug. 10 
Aug. 23 
Aug. 24 
Aug. 23 
Aug. 27 
Aug. 26 
Aug. 27 
Aug. 28 
Aug. 30 
13 
do 
Aug. 11 
1 
do 
16 
2 
1 
1 
1 
Aug. 12 
14 
15 
16 
18 
do 
do 
2 
16 
do 
Average 
2 
16 
1 
19 
16 
15 
13 
In Table XX the length of the pupal stage of 90 individuals is 
given. The average length of the stage was 13.4 days for males and 
13.11 for females, all on unsprayed foliage. On sprayed foliage the 
average length of the period was 16 days for males and 15 for females. 
LENGTH OF TIME SPENT IN THE COCOON BY FIRST-BROOD 
INDIVIDUALS. 
The average length of time in the cocoon on unsprayed foliage is 
shown in Table XXI to be 15.52 days for males with 32 days as the 
maximum period and 9 days as the minimum. For females on un- 
sprayed foliage 14.62 days was the average period, 32 days the 
