-32U- 
Area 
Number of fields 
sampled 
Percentage of stems infested 
average 
Maxi] 
...ir.irr^r. 
Nebraska: 
Southwestern 
South-central 
Southeastern 
Kansas : 
northwestern 
North-central 
Northeastern 
South-central 
Southeastern 
Oklahoma: 
Northeastern 
Missouri: 
Northwestern 
Northeastern 
West-central 
East- central 
Southwestern 
Southeastern 
Illinois: * 
Northwestern 
Northeastern- 
West-central 
East-central 
Southern 
Michigan: 
Southern 
Indiana: 
Central and northern 
Southern 
Ohio: * 
Except southeastern part- 
Kentucky: 
western 
North- central 
Tennessee: 
Central 
Eastern 
Pennsylvania: 
West- central 
Central 
Southeastern 
Maryland: 
No rth- cent ral 
Eastern 
Delaware 
Virginia: 
Northwestern 
Northeastern 
South-central 
North Carolina: 
Central 
11 
IS 
26 
12 
26 
35 
2h 
32 
18 
20 
12 
39 
22 
16 
lU 
2U 
2k 
5 U 
97 
35 
103 
97 
3U0 (approx. ) 
6 
13 
22 
33 
20 
20 
S3 
25 
15 
15 
20 
13 
30 
t race 

trace 

trace 
2 
2 
12 
5 
1 
10 
I 
22 
12 
k 
3 
3 
10 
52 
lU 
2S 

9 
7 
1 
3^ 
3* 
5 
5 
1 
1 
15 
5 
7 
2 

2 

2 
28 
18 
50 
18 
2 
62 
30 
70 
68 
ko 
SO 
66 
36 
50 
10 
: 'Mostly from survey "by State entomologists, 
