Hessian fly survey at harvo sttime 194l , — C on t i nue d 
Eiclds 
Stems infested 
Area 
sampled 
Average 
Maximum 
Minimum 
Number 
Percent 
Percent 
Percent 
Tonnes seel 
West-central- 
36 
16 
70 
2 
Eastern 
52 
15 
50 
4 
Pennsylvania! 
Eastern 
29 
7 
20 
0 
North-centr al 
22 
6 
22 
0 
South— central- 
35 
11 
go 
0 
Western— 
15 
2 
g 
0 
Delaware 
10 
3 
10 
0 
Maryland: 
Eastern 
15 
3 
16 
0 
Western- — 
25 
12 
56 
0 
Virginia: 
Northeastern 
’40 
5 
26 
0 
Northwestern 
20 
7 
20 
0 
Southern 
15 
16 
50 
0 
North Carolina: 
No r th-c on t r al 
4o 
S 
44 
0 
Data obtained partly or mostly by State entomologists. 
