. 
INSECT PEST SURVEY BULLETIN 
Vol. 1 
August 1, 1921 
No. 4 
GERE 
ND F R / G E CROP INSECTS 
WHEAT 
HESSIAN PLY (Phytophaga destructor Say) 
Ohio 
H. A. Gossard* "Asurvey of 31 counties of the State showed 
an average of 17 per cent of the strav/s infested with Hessian 
fly; last year the average was 44 per cent. There are nine 
counties in the northwestern corner of the State vhich average 
35 per cent, but parasitism is high in these counties, running 
from 50 to 60 per cent. When the flaxseeds, dead through 
desiccation and natural causes, are added to these only 10 to 
20 per cent of the flaxseeds are living. The average infes- 
tation for the remainder of the State is about 9 per cent, and 
parasitism in some counties ran 100 per cent according to our 
counts. 
Indiana 
Illinois 
a scons in 
J. J. Davis (July 15), "A systematic survey has not yet been 
made. There is a fairly heavy infestation of the spring brood, 
and \ve anticipate a heavy fall issuance," 
W. P. Flint (July 18). "Much less fallens traw at harvest than 
is the cose in average years over the entire State." 
H. P. Wilson (July 11). "Previous to 1918 the Hessian fly had 
not been reported in this St3te for a number of years* now it is 
known to occur clear across the State in the southern tier of 
counties. No serious outbreaks have been reported." 
Nebraska 
M. H. Swenk (July 15). "Is a serious menace to the crop Of 
winter wheat to be planted this fall over all of the eastern 
opunties of the State, south of the Platte River and west of 
the 97th meridian. Especially numerous in Washington and Burt 
Counties. Emergence has not yet commenced in our rearing cages. 
Altogether this insect is the most menacing pest. of Nebraska's 
grain crop at present." 
"'issouri 
L, Haseman. "The Hessian fly survey which is being completed 
has revealed the presence of heavy infestation and danger of 
serious loss to the next wheat crop in various parts of the 
State. The average infestation of the 29 counties for which 
percentages have been worked out amounts to 21 per cent; the 
greatest infestation seems to be in a belt extending across the 
