I N S 2 C T PEST SURVEY BULLETIN 
Vol. 2 
.'pril 1, 1922 
No. 1 
C E R S A L A FD PORUE-CROP PIN S E C T S 
HESSIAN FLY ( Phyto-phaga cies true tor Say) 
T ew York 0. R. Crosby (survey for 1921). "During; the la to summer of 1921, 
the Bureau of Entomology, in cooperation 'ith this office, made 
very careful counts of wheat stubble throughout New York State to 
ascertain the percentage of infestation by the Hessian fly. The 
samples were taken at various points throughout the counties, this 
office taking 25 straws in a sample while the Bureau of Entomology 
examined from 20 to 50 straws. /The samples were taken at from 4 
to 20 different places in each county with the following results: 
Per cent 
Cayuga 
Columbia. . . 
Erie 
Genesee. . . . 
Livingston. 
Monroe. 
6.9 
9.9 
8.2 
7.6 
4.2 
...... 2.8 
Niagara 12.3 
Per cent 
Ontario 4.0 
Orleans........ 10.6 
Seneca,.... 2.6 
Tompkins 12.4 
Ulster 6.4 
'Vayue 9.3 
Wyoming 4.9 
"This mates an average infestation for the State in last yearSfi 
stubble of 7.3 per cent.' 1 
Iowa C. ". /inslie, Bureau of Entomology. "Examinations made late in 
October, 12 miles from Sioux City, showed plenty of eggs and 
larvae as well as pupa r is in volunteer wheat at that time. 
Twenty miles north of this point no trace of the fly could be 
found. In this latter region no volunteer wheat was found in 
the fields examined and the sown grain was quite free. On the 
Missouri River bottoms to the south the infestation was very 
general, but the injury will probably be slight." 
Nebraska M. H. Swenk (November 18, 1921). "The only report of serious in- 
jury to the new wheat by the Hessian fly coming to our attention 
during the period here covered (October 15 to November 18, 1921) 
was from York County during the middle of October in early sown 
fields." 
(March 15.). "Examinations of the winter wheat in various 
localities indicate th.it the Fessian fly is present about as it 
was in the Spring of 1921. The outlook at present does not 
look particularly serious." 
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