INSECT PEST SURVEY BULLETIN 
Vol.2 
August 1,1022 
No .5 
CEREAL AID FORAGE-CROP INSECTS 
WHEAT 
Now York 
Ohic 
Indiana 
Illinois 
Minnesota 
Nebraska 
. . HESSIAN FLY CPhyt oPhaga des t rustor Say) 
L. C. Tyler (j\oe 23), "Wheat is already going down in many fields in 
Genesee County. The insects are now largely in the flaxseed stage. 
Apparently the infestation will he quite serious," 
H. A, Gossard (July 21 N . "Statewide survey was completed late in June 
and indicated that the Hessian fly has been reduced to normal numbers 
(l to 5 per cent infestation) in all counties of the State, except the 
northwestern 15 or 20 counties. The percentage of infestation here was 
much lower than last year, varying from 10 to 30 per cent where wheat 
was seeded as advised. In every instance ; where wheat had been seeded 
a week or two earlier than the fly-free date the infestation ran from 
80 t8 100 per cent, while fields seeded at the advised -tx,:,t ran in 
every case with but one exception below 20 per cent. In Williams 
County the average infestation ranged from 20 to 30 per cent, even though 
the fly-free date was generally heededj we probably missed the date by 
two or three day? in this county, or possibly the old volunteer 
stubble fields contributed to the high infestation. Parasitism seems 
to be very high in all of the badly infested fields this season." 
J. J. Davis (July 20) » "No heavy infestations found in the northern 
half of the State; examinations shew 5 to 50 per cent infestation, 
usually ranging between. 5 and 15 per cent." 
C. C. Compton (June 17). "In Kendall County general infestation ranges 
from 5 to 8 per cent; in one field a 50 per cent infestation was 
discovered. " 
A. G. Ruggles (July 19). "The first authoritative report of this insect 
in Minnesota in th3 past 15 years was received this month. A winter 
wheat field in Carver Comnty was badly infested. No other complaints 
have 4 been received and, it is possible $hat the infestation is localized. 
F, A. Fenton (July 15). "The Hessian fly had done more damage to wheat 
in Iowa than for four years and is on the increase. In some places 
wheat has not yielded more than 10 bushels to the acre. Heavy damage 
has resulted wherever t wheat was planted early." 
M. H. Swenk (July 15). "Harvest revealed the presence of the Hessian 
fly in mdderate abundance over southern Nebraska, and in some &&&-■■ 
localities in large enough numbers to do material damage to the wheat 
crop; such local centers of more than moderate abundance and injury 
are present in Dakota, Washington, Dodge, Saunders, Seward and 
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