-5 
Table 3. --Percent survival of cigarette beetles at various depths in 
cases of cigar tobaccos of different moisture content, held for 3 days 
in commercial cold storage at -20 F. 
Moisture condition 
of tobacco 
Depth of insects 
in tobacco 
Adults 
Larvae 
Pupae 
Eggs 
Dry 
Medium order 
Soft 
Medium order (check) 
Inches 
4 




8 




12 
8 
16 
4 

16 
16 
44 
60 
8 
4 




8 

4 


12 
48 
50 
32 
11 
16 
34 
59 
64 
93 
4 




8 

68 
24 
20 
12 
100 
76 
52 
98 
16 
100 
100 
82 
100 
4 
100 
96 
100 
100 
8 
100 
92 
100 
100 
12 
100 
96 
100 
100 
16 
100 
92 
100 
100 
Summary 
Three experiments on the control of the cigarette beetle ( Lasioderma 
serricorne (F.)) in tobacco exposed to subzero temperatures were con- 
ducted at Lancaster, Pa. , in 1950. In the first experiment all stages of 
the beetle were placed at the center of tobacco held in cold storage 
chambers at approximately -10° F., and in the second experiment they 
were placed at various depths in the tobacco. In both these experiments 
the air was circulated. In the third experiment, the insects were placed 
in tobacco in a commercial cold-storage plant at -20° F. in which the 
air was not circulated. 
The low temperatures did not injure any of the tobacco. 
