- 3 6- 
Malheur County was omitted from the 1937 fall survey, two 
seasons' study having shown no appreciable differences "between alfal- 
fa weevil conditions in this county and in Canyon County, Idaho. The 
latter county is typical of the lower Snake River Valley of western 
Idaho and eastern Oregon, and survey results for it serve as an indi- 
cation for adjoining counties in Idaho and Oregon. 
In Jackson County (table 2.) approximately $0 percent of the 
fields surveyed were inhabited by threatening weevil populations. The 
parasite, first introduced into this area in 193^i was recovered from 
every field examined in the fall of 1937' Its increasing abundance 
indicates that it nay develop into an important factor in alfalfa weevil 
control for this area. 
Table 2. — Survey results', Jackson Cou n ty. Oreg. . 
sampled October 5-28. 1937 
Field No." 
; H. postica < 
: adults 
B. curculionis cocoons 
! Proaont 
: Viable 
1 _ *..J _ 
2 - -, „'.- - - - 
6 I I " " " '- I 
9 ;. 
10 
ii _ ^ 
12 - _ ; 
13 _ - - . 
Ik - 
15 ; 
16 
17 - - - - 
IS , . 
19. _ 
20 
21. 
22,- - 
23 _ _ _ _ : 
2U. ! 
25 - " - I 
! Number 
: 2,50 
: ... 3.50 
! 1.00 
: I.50 
: . 1.00 
: 6 
: 1.25 
! .25 
: -75 . 
: I.25 : 
.25 
! 1.50 
! .25 
2.50 
2.50 .' 
2.00 
3.00 
.'. 1-75 :' 
2.25 
H.50 '. 
3.25 . 
2.25 
u.oo : 
^.25 ! 
1.75 
: Number 
! ^25 ' 
'. , 2.00. 
1 9.75 . 
: '6.00 
: -?.50 
\ 2.50 
: 6.50 
: ^.50 
: 3.00 
» * ( -J 
\ 2.25 
: 6.50 
: 6.00 
: ^.25 
: 3.75 
: 7.25 
: 5.25 
: 1.75 
: g.00 
: S.25 
: 3.50 
5.25 
2.75 
.50 
2.50 
: Number 
i, .50 
: .75 
1 3.25 
i -75 
! 1.50 
: 1.00 
: 3.75 
: 2.75 
: 1.75 
! .25 
: .50 
: 2.50 
! 1.50 
: 2.00 
! I.50 
: 3.75 
: 2.50 
: 
: 2.25 
: 1.25 
: 1.00 
•75 
2.00 
•25 
1.50 
• Average - ■ : 
1 
1.96 • 
» 1 
U.36 
1.5S 
