354 
Journal of Agricultural* Research 
Vol. XXVIII, No. 4 
Table VII. — Effect of fumigation of weevils, Bruchus quadrimaculatus, within 
blackeyed cowpeas 
Material used 
Dosage per 1,000 
cubic feet 
| Exposure 
Killed 
Eggs 
Larvae 
Pupae 
Adults 
Tem¬ 
pera¬ 
ture 
Humid¬ 
ity 
Young 
One-fourth 
grown 
08 _ 
Sa 
O 
Full-grown 
Unemerged 
Emerged 
before fu¬ 
migation 
Maximum 
Minimum 
Maximum 
Minimum 
Lbs. 
Hrs . 
P.ct. 
bp. 
>F. 
CS 2 and 29-inch vacuum_ 
31 
1 
100 
237 
25 
3 
3 
5 
46 
31 
16 
82 
82 
Do... 
31 
1 
100 
580 
20 
10 
2 
7 
30 
74 
32 
82 
82 
Liq. HCN.... 
2 
48 
100 
104 
23 
2 
4 
9 
54 
39 
17 
92 
64 
79 
46 
Do.... 
2 
48 
100 
76 
17 
5 
1 
3 
50 
42 
17 
92 
64 
79 
46 
Control___ __ 
81 
14 
2 
2 
3 
9 
8 
113 
92 
64 
79 
46 
Do... 
171 
22 
21 
22 
20 
21 
43 
105 
92 
64 
79 
46 
Liq. HCN... 
i.3 
90 
100 
69 
20 
3 
0 
3 
44 
62 
7 
91 
58 
79 
43 
Do..... 
1.3 
90 
100 
40 
15 
5 
2 
12 
35 
57 
2 
91 
58 
79 
43 
Control___ 
65 
9 
2 
1 
2 
18 
21 
110 
91 
58 
79* 
43 
Do. 
64 
7 
10 
7 
12 
8 
8 
99. 
91 
58 
79 
43 
HCN, pot method.. 
•3.4 
48 
100 
124 
53 
51 
91 
108 
128 
82 
69 
71 
51 
Control... 
13 
12 
15 
14 
24 
2,269 
82 
69 
71 
51 
HCN, pot method. 
• 1.8 
90 
100 
78 
46 
5 
1 
3 
21 
51 
7 
84 
67 
66 
61 
Do. 
• 1.8 
90 
100 
68 
25 
15 
10 
1 
10 
49 
14 
84 
67 
66 
61 
• Dosage of sodium cyanide used to generate the gas. 
Table VIII. — Effect of fumigation of weevils, Bruchus Quadrimaculatus, within 
Red Ripper cowpeas 
Material used 
Dosage per 1,000 
cubic feet 
Exposure 
T3 
1 
M 
& 
bfi 
w 
Larvae 
Pupae 
Adults 
Tem¬ 
pera¬ 
ture 
Humid¬ 
ity 
Young 
One-fourth 
grown 
One-half 
grown 
Full-grown 
Unemerged I 
Emerged 
before fu¬ 
migation 
Maximum 
Minimum 1 
Maximum 
Minimum 
Lbs. 
Hrs. 
P.ct . 
°F. 
°F. 
CSa and 29-inch vacuum__ 
31 
1 
100 
70 
108 
57 
54 
144 
31 
82 
82 
Do.... 
31 
1 
100 
63 
103 
54 
53 
138 
60 
82 
82 
Do.... 
31 
1 
100 
72 
255 
171 
88 
38 
82 
82 
Do. 
31 
1 
100 
72 
163 
251 
75 
33 
1 
82 
82 
Liq. HCN...:. 
2 
48 
100 
169 
158 
72 
52 
60 
1 
92 
64 
79 
46 
Do... 
2 
48 
100 
146 
160 
57 
44 
65 
1 
92 
64 
79 
46 
Do__... 
2 
48 
100 
71 
508 
92 
18 
6 
92 
64 
79 
46 
Do. 
2 
48 
100 
153 
558 
25 
9 
2 
92 
64 
79 
46 
Control. 
23 
73 
18 
18 
30 
66 
191 
92 
64 
79 
46 
Do... 
5 
12 
13 
25 
66 
144 
55 
92 
64 
79 
46 
Do.. 
37 
10 
5 
15 
25 
121 
160 
92 
64 
79 
46 
Do... 
3 
6 
6 
16 
45 
93 
251 
92 
64 
79 
46 
Liq. HCN. 
1.3 
90 
100 
55 
136 
56 
66 
108 
23 
91 
58 
79 
43 
Do.;. 
1.3 
90 
100 
35 
100 
50 
71 
90 
29 
91 
58 
79 
43 
Do.. 
1.3 
90 
100 
75 
218 
222 
72 
42 
1 
91 
58 
79 
43 
Do. 
1.3 
90 
100 
54 
163 
257 
80 
53 
91 
58 
79 
43 
Do. 
1.3 
90 
100 
50 
100 
37 
40 
134 
46 
91 
58 
79 
43 
Do...— 
1.3 
90 
100 
74 
256 
127 
78 
56 
8 
91 
58 
79 
43 
Control—.... 
22 
24 
12 
18 
29 
48 
179 
91 
58 
79 
43 
Do... 
12 
14 
6 
12 
26 
53 
168 
91 
58 
79 
43 
Do. 
5 
8 
25 
24 
121 
163 
91 
58 
79 
43 
Do. 
3 
28 
6 
10 
34 
114 
196 
91 
58 
79 
43 
Do. 
10 
32 
30 
30 
56 
110 
145 
91 
58 
79 
43 
Do.... 
6 
2 
3 
14 
25 
70 
203 
91 
58 
79 
43 
HCN, pot method. 
°3.4 
48 
155 
85 
146 
79 
93 
68 
40 
14 
3 
82 
6 £ 
71 
51 
Do.. 
•3.4 
48 
100 
57 
124 
90 
63 
69 
89 
9 
82 
6£ 
71 
51 
Do. 
•3.4 
48 
100 
-64 
237 
109 
138 
113 
11 
82 
69 
71 
51 
Do... 
•3.4 
48 
100 
89 
152 
147 
115 
141 
130 
82 
6 £ 
71 
51 
Control... 
42 
41 
43 
47 
43 
72 
46 
82 
6 f 
71 
51 
Do. 
62 
88 
78 
81 
125 
49 
71 
69 
82 
6 £ 
71 
51 
Do. 
- 
19 
17 
41 
29 
39 
84 
100 
82 
6 £ 
71 
51 
Do. 
13 
29 
24 
37 
45 
70 
160 
82 
6 £ 
71 
51 
HCN, pot method. 
• 1.8 
90 
100 
79 
137 
92 
53 
159 
133 
1 
84 
67 
66 
51 
Dol. 
• 1.8 
90 
100 
70 
91 
62 
30 
106 
142 
19 
84 
67 
66 
51 
Control_ 
20 
34 
29 
27 
117 
89 
102 
84 
67 
66 
51 
Do. 
12 
28 
16 
40 
60 
60 
131 
84 
67 
66 
51 
Dosage of sodium cyanide employed to generate the gas. 
