542 JOURNAL OF ECONOMIC ENTOMOLOGY [Vol. 17 
Table 1. Showing Temperature and Humidity During the Period Following 
the Various Plantings, May 5-22, 1922 
Temperature Humidity 
May 
* Max. 
Mean 
Min. 
Max. 
Mean 
Min. 
5 
80 
69 
58 
74 
64 
55 
6 
66 
62 
59 
76 
69 
63 
7 
63 
60 
57 
80 
76 
72 
8 
71 
63 
55 
79 
67 
55 
9 
64 
56 
48 
81 
67 
53 
10 
73 
58 
44 
72 
60 
48 
11 
82 
65 
49 
72 
54 
36 
12 
93 
74 
55 
61 
44 
28 
13 
104 
80 
62 
52 
38 
24 
14 
90 
77 
64 
55 
48 
42 
15 
84 
74 
65 
74 
64 
55 
16 
82 
72 
62 
76 
66 
56 
17 
76 
68 
60 
78 
69 
60 
18 
71 
63 
57 
75 
69 
64 
19 
80 
68 
56 
75 
63 
51 
20 
78 
68 
59 
70 
62 
55 
21 
84 
69 
55 
76 
62 
49 
22 
89 
73 
57 
74 
57 
41 
insects and are not included in Table 2. Eighteen, seventy-five and one- 
hundred per cent of the plants coming from beans having 3, 4 and 5 
holes respectively, died early in the summer. 
Physical Injury to Young Plants 
After the bean plants were up the weevil holes showing in the cotyle¬ 
dons were surrounded by a hard brown area. Usually the pupal cells 
and weevil emergence holes extended through one cotyledon and well 
into the other. This had a tendency to keep the cotyledons from separat¬ 
ing properly after the bean had forced its way up out of the ground. 
Frequently the testa or seed coat was held firmly attached to the cotyle¬ 
dons by the hard brown area surrounding the emergence holes. This 
kept the cotyledons from spreading, thus crowding and dwarfing the 
primary leaves; in some instances the cotyledons would break off 
leaving only the hypoctyl and the early stage of the primary leaves. 
The food supply in the cotyledons which should have nourished the 
young plant while it was becoming established, was thus removed, and 
the plant was starved to death. 
The greater the number of emergence holes there were present in the 
beans, the greater was the probability that decay and mites would kill 
