July is, 1925 Effect of Low Temperatures on Bruclms obtectus 
177 
Table’III .—Limits of fatal temperature-time zones of Bruchus obtectus —Con. 
LARVAE OF KNOWN AGE 
Temper- 
Time 
Result 
Temper- 
Time 
Result 
ature 
ature 
°C. 
Hours 
°C. 
Hours 
-2 
168 
Lived. 
-14 
2 
Killed. 
-8 
36 
Killed. 
-17 
56 
Do. ® 
-9 
1 
Do. 
-20 
24 
Do. 
EGGS 
r 24 
Hatched. 
-17 
/ 56 
Killed. 
— / 
l 48 
Do. 
i 48 
Do. 
-8 
/ 66 
Do. 
[ 1 
Hatched. 
\ 60 
Killed. 
-20 
\ 4 
Do. 
-10 
f 4 
Hatched. 
1 5 
Killed. 
\ 16 
Do. 
2 
Do. 
5 
Killed. 
-14 
6 
Hatched. 
6 
Killed. 
7 
Do. 
• Cases where death followed post-freezing development, 
-t. 
-°C. 
Fig. 4.—Limits of fatal temperature-time zone. A, active adults; B, unemerged adults 
