30 Texas AGRICULTURAL EXPERIMENT STATIONS. 
bisulfide upon the pupe. It was found that they are quite susceptible, 
but a long exposure to the fumes is necessary, as the pup do not consume 
air very fast. . : 
From the experiments conducted with the moths it was found that they 
are very susceptible to the fumes of carbon bisulfide. With the average 
dose the moths were overcome in ten to fifteen minutes and were killed 
in fifteen to twenty minutes after being confined. 
All funigation should be allowed to continue for at least twelve hours, 
for those larva which are best protected by webs and refuse will not be 
killed unless plenty of time is given for the gas to penetrate the material. 
The liquid will evaporate in a few hours, but the resulting gas will be 
effective for several hours. 
The following table has been prepared to show at a glance how much 
liquid carbon bisulfide is required for the effective fumigation of supers 
and hive-bodies containing infested material. 
Table II1I—Amount of Carbon Bisulfide to Use in Fumigating Supers 
for the Wax-Worm. 
Shallow Extracting (‘‘Ideal’’) Supers, 10-Frame Size, Depth, 5 3-8 Inches. 
Number of Supers Cubic Feet Contained Amount of Liquid Bisulfide 
in the Tier. in Tier. Required. 
2 1.74 One-third ounce. 
3 2.61 | One-half ounce. 
4 3.48 Three-fourths ounce. 
5 4.35 One ounce. 
6 5.22 One and one-fourth ounces. 
7 6.09 One and one-half ounces. 
8 6.96 One and three-fourths ounces. 
9 7.83 Two ounces. 
10 8.70 Two and one-fourth ounces. 
11 9.57 Two and one-half ounces. 
12 10.44 Two and three-fourths ounces. 
Table IV.—Amount of Carbon Bisulfide to Use in Fumigating Hive 
Bodies for the Wax-Worm. 
Hive Bodies (10-Frame), Depth 934 Inches. 
Number of Bodies Cubic Feet Contained | Amount of Liquid Bisulphide 
-in the Tier. ta Tier. ! equired. 
2 2.90 Two-thirds ounce. 
3 4.35 One ounce. 
4 5.80 One and one-third ounces. 
5 7.25 One and two-thirds ounces. 
6 8.70 Two ounces. 
7 10.15 Two and one-third ounces. 
8 11.60 Two and two-thirds ounces. 
For 8-frame supers and hive-bodies use 80 per cent as much bisulfide 
as is given above for the corresponding number of supers or bodies. 
Example: We will suppose that the beekeeper has six 10-frame shallow 
extracting supers containing combs which he wishes to fumigate. All 
are tiered up as previously directed and an empty super is placed on top. 
This makes seven supers 1n all. Reference to the above table shows that 
this tier of seven supers contains 6.09 cubic feet of space and that for 
the destruction of all of the wax-worms in it, one and one-half ounces 
of the liquid bisulfide are required. 
