54 
BULLETIN 1476, U. S. DEPARTMENT OF AGRICULTURE 
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Fig. 24. — General view of a field of sweet corn ruined by European corn borer. 
No marketable ears were obtained from this field. Medford, Mass., September, 
1922 
Table 13. — Per cent of broken-over stalks and ear stems due to larval injury 
by the European corn borer 
Type of corn 
Num- 
ber of 
plats 
Total 
stalks 
Per 
cent 
stalks 
in- 
fested 
Per cent stalks 
broken over 
at harvest 
Total 
ears 
Per 
cent 
ear 
Per 
cent 
ear 
stems 
Below 
ear 
Above 
ear 
st f n ms jbroken 
fpstpd 1 over at 
tested | narvest 
1 
Flint 
4 
4 
147 
140 
100 
100 
10.8 
22.8 
16.3 
29.9 
110 
78 
72.7 19.9 
Dent 
85.9 2.6 
Total 
287 
188 
1C0 
16.7 
22.9 
78.2 
12.8 
Fig. 2o. — " Close-up '* of hill of sweet corn ruined by Eu- 
ropean corn borer. No marketable ears were produced 
in this hill. Medford, Mass., September, 1U22 
