26 
BULLETIN 911, U. S. DEPARTMENT OF AGRICULTURE. 
FIRST GENERATION. 
TIME OF COCOONING AND LENGTH OF TIME IN THE COCOON OF FIRST- 
BROOD INDIVIDUALS. 
Table XXX. — Time of cocooning and length of time in cocoon of the first brood of 
the grape-berry moth, Sandusky, Ohio, 1918. 
Number of 
larvae. 
Date 
larva? 
left fruit. 
Julv 7 
JulV 9 
...do 
July 10 
July 11 
July 12 
...do 
July 13 
...do 
...do 
...do 
July 14 
...do 
Julv 15 
...do 
...do 
July 16 
...do.... 
...do 
...do.... 
July 17 
...do 
Julv 18 
...do 
...do 
July 19 
...do 
...do..... 
...do 
July 20 
...do 
...do 
...do 
Julv 21 
...do 
...do 
July 22 
...do 
...do 
July 23 
...do 
July 24 
July 25 
...do 
July 26 
...do 
...do 
Julv 27 
...do 
...do 
July 28 
...do 
July 29 
...do 
Julv 30 
...do 
July 31 
...do 
...do..... 
Aue. 1 
...do 
Days. 
Moths 
emerged. 
July 
...do. 
July 
...do.. 
...do.. 
...do.. 
Julv 
July 
July 
July 
Julv 
Julv 
July 
...do.. 
July 
Julv 
July 
July 
July 
Aug. 
July 
Julv 
July 
Julv 
July 
Julv 
July 
Aug. 
Aus:. 
Julv 
July 
Aug. 
Aug. 
...do.. 
Aug. 
Aug. 
...do.. 
Aug. 
Aug. 
Aug. 
In co- 
coon. 
Aug. 
6 
...do. 
Aug. 
7 
Aug. 
8 
Aug. 
6 
Aug. 
8 
Aug. 
9 
Aug. 
8 
Aug. 
9 
Aug. 
10 
...do. 
Aug. 
11 
Aug. 
10 
Aug. 
11 
Aug. 
10 
Aug. 
11 
Aug. 
12 
Aug. 
13 
Aug. 
14 
Aug. 
12 
Aug. 
13 
Aug. 
14 
Total. 
16 
56 
15 
42 
39 
24 
39 
22 
12 
26 
14 
36 
26 
60 
13 
14 
22 
36 
26 
17 
10S 
28 
60 
143 
10 
96 
39 
14 
10 
33 
108 
52 
36 
117 
98 
208 
196 
15 
234 
154 
78 
13 
112 
11 
104 
110 
24 
91 
42 
117 
84 
12 
78 
11 
12 
84 
39 
14 
22 
24 
13 
Number of 
larvae. 
Date 
larvae 
left fruit. 
Aug. 2 
...do 
...do 
Aug. 3 
...do 
Aug. 4 
...do 
...do 
...do 
...do 
Aug. 5 
Aug. 6 
...do 
...do 
...do 
Aug. 7 
...do 
...do 
...do 
...do 
...do 
...do 
Aug. S 
...do 
...do..... 
...do 
Aug. 9 
..do 
..do 
..do 
Aug. 10 
..do 
...do 
...do 
...do 
Aug. 11 
...do 
Aug. 12 
...do..... 
...do 
Aug. 13 
...do 
...do 
Aug. 14 
...do 
Aug. 15 
...do 
Aug. 16 
...do 
Aug. 17 
...do 
...do 
...do 
Aug. IS 
Aus. 19 
Aug. 20 
Ausr. 21 
Aug. "22 
Aue. 23 
Total, 522 i. 
Moths 
emerged. 
Aug. 13 
Aug. 14 
Aug. 15 
Aug. 14 
Aug. 16 
Aug. 15 
Aug. 16 
Aug. 17 
Aug. 18 
Aug. 20 
Aug. 17 
Aug. 18 
Aug. 19 
Aug. 20 
Aug. 21 
Aug. 18 
Aug. 19 
Aug. 20 
Aug. 21 
Aug. 22 
Aug. 23 
Aug. 26 
Aug. 20 
Aug. 21 
Aug. 22 
Aug. 23 
Aug. 21 
Aug. 22 
Aug. 23 
Aug. 25 
Aug. 21 
Aug. 22 
Aug. 23 
Aug. 24 
Aug. 25 
Aug. 23 
Aug. 24 
...do.... 
Aug. 25 
Aug. 27 
Aug. 26 
Aug. 27 
Aug. 28 
Aug. 27 
Aug. 28 
...do 
Aug. 29 
Aug. 2S 
Aug. 29 
Aug. 2S 
Aug. 29 
Aug. 30 
Aug. 31 
...do 
Sept. 2 
Seot. 4 
Sept. 5 
Sept, 6 
Days. 
In co- 
Average days, 12.9. 
Maximum days, 19. 
Minimum days, 10. 
It is seen in Table XXX that first-brood larvse began to leave the 
fruit July 7 and continued to leave until August 23. The table does 
