•— 5io *• 
Area 
Neb r as lea: 
Southwestern 
South-central - 
Southeastern ■ 
Kan? as : 
Northwestern 
North-central 
Northeastern — — 
South-central 
Southeastern 
Oklahoma: 
Northwestern 
North-central 
Northeastern 
Missouri: 
Northwestern 
North-central — 
Northeastern — 
Illinois :~' 
Western, central, and eastern - 
Southern 
Michigan : 
Southwestern 
South-central 
Central (south) and southeast- 
ern 
Indiana: 
Northern and central (north) - 
Eastern, centrnl (south), 
southern, and western — 
Southwestern — 
Fields 
sampled 
Number 
3 
is 
Ho 
HO 
37 
19 
28 
37 
19 
2S 
37 
16 
15 
17 
162 
189 
k2 
Average 
Percent 





3 
1 
5 
3 
23 
22 
5 
11 
Stems infested 
M aximum 
Percent 

2 
6 

U 
56 
26 
28 
2 
2 
10 
2 
2 
10 
lH 
52 
8G 
30 
Mi nimum 
Percent 
















1/ 
Mostly from survey by State entomologists. 
