-33- 
B. curculionis cocoons were rather scarce "but this parasite promises to he 
effective next season. The following table shows results of the survey in 
Bonneville and Bingham Counties, sampled on September 22-24. 
: H. postica 
adults 
3. curculionis cocoons 
Field No. 
Present 
Viable 
3 
5 
6 
8 , 
9 
10 
11 
12 ' 
13 
! Number 
3.25 
1.50 
2.00 
.50 
.50 
.75 
.25 
.50 

.25 
! .25 
: .75 
.50 
: Number 
: 3.25 
: 6.75 
: 3.50 
: 23.25 
: 8.50 
: .75 
: 
: .50 
: 
: .25 
: .50 
: 10.75 
: 15.50 
: Percent 
46.15 
: 14.81 
: 35.71 
! 12.90 
: 8.82 
: 66.67 
: 50.00 
: 
: 50.00 
: 30.23 
6.45 
Average - 
0.85 
3. 60 
! 26.74 
Adult populations indicate considerable damage in 1937, menacing 
populations being present in almost half of the fields. B. curculionis 
cocoons averaged 5.85 per square foot and may be sufficiently numerous to 
be effective, at least during the early part of the 1937 season. In the 
next table are given results of the survey in Fremont, Madison, and Jefferson 
Counties, sampled on September 22-24. 
Field No, 
H. postica 
adul t s 
B. curculionis cocoons 
Present 
Viable 
14 
15 
16 
17 
18 
19 
20 
21 
22 
23 
24 
Average - 
Number 
1.00 
.25 
.25 
1.25 
.50 
.25 
2.00 
4.50 
2.25 
1.75 
2.50 
2.75 
Number 
3.75 
1.00 
6.25 
14.00 
1.00 
4.28 
1.25 
8.25 
3.75 
15.50 
4.50 
6.75 
1.60 
5.85 
13.88 
Canyon County . — Observation in the lower Snake River Valley of western 
Idaho last season revealed comparable conditions in Ada, Gem, Canyon, Payette, 
and Washington Counties. As a result, the fall survey vns limited to Canyon 
County, which contained the largest alfalfa acreage. Adult populations were 
small, no fields having menacing numbers. B. curculionis cocoons were scarce 
