February, ’20] 
MARLATT: EUROPEAN CORN BORER 
79 
by Dr. C. G. Woodbury, director of the State Experiment Station, 
went over the same ground. This commission included also the state 
entomologist, Mr. Frank N. Wallace, Mr. L. M. Vogler, representing 
Record of Field Infestations by States, 1919 
Townships 
Number of 
townships 
inspected 
Man 
days 
Number of 
fields 
examined 
Number of 
fields 
infested 
New Hampshire. 
37 
979 
8,727 
22,928 
4,758 
1,162 
311 
3 
Massachusetts. 
146 
1,015 
983 
42 
Eastern New York. 
60 
37 
Western New York. 
46 
179 
16 
Pennsylvania. 
10 
13 
0 
Ohio. 
16 
29 
381 
0 
Rhode Island. 
1 
12 
72 
0 
the farm associations of Indiana, and Mr. William H. Larrimer, an 
entomologist of the United States Bureau of Entomology in charge 
of a field station at Lafayette, Indiana. I have here the reports from 
Dr. Woodbury and Mr. Wallace. They are in substantial agreement 
with the viewpoint of the board and of the department. That is 
the way the corn borer situation impressed these independent bodies 
of men who were fully competent to determine what the insect is 
really doing. 
I wish now to discuss certain hopeful features that put a rather 
different aspect on the corn borer situation. 
The first of these is the factor of the number of broods. The fact 
that it is single-brooded in New York state has been pointed out by 
Dr. Felt. As a single-brooded insect its damage in that state has been 
negligible. In October, I asked Mr. Van Buren, who had charge of 
the corn borer work in New York, how much damage it had done in 
New York state. His answer was that it had done practically no 
damage. 
In Massachusetts the insect is double-brooded and the damage has 
been severe in special fields, but taking the area as a whole, as already 
indicated, the percentage of damage is very low. I doubt, however, 
if any of the fields have shown more than 10 per cent damage. Under¬ 
stand what I mean by 10 per cent. I mean 10 per cent loss of corn. I 
do not mean 10 per cent of stalks infested. 
It has been stated here that the damage in the season 1918 was even 
worse than in 1919. I have here the statement of Mr. S. C. Vinal on 
the damage of the 1918 crop. It will be remembered that Mr. Vinal 
is the man who discovered the corn borer and was in charge of the 
work for Massachusetts until his sudden* death last winter from 
