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HESSIAN FLY (Phvtophapra dest ructor Say) 
Indiana J.J. Davis (Purdue University Insect Notes No. 19): The Hessian 
fly infestation is not noticeably heavy in wheat stubble in north- 
ern Indiana, except in fields sown before the fly-free date last 
year, but is abundant in the southern third of the State. Counts 
made by \" r . H. Larriaier, of the U. S. Entomological Laboratory, show 
the infestation of stubble in the southern third of the State to be 
from 8 to 36 per cent, enough to cause a serious infestation in 
wheat sown before the fly-free date. Because of this infestation 
it is important that all wheat growers in southern Indiana adhere 
to the fly-free sowing dates, and it is equally important, if not 
more so, that the wheat growers of northern Indiana use similar 
precautions and cooperate in sowing after the fly-free dates in 
order to maintain the minimum infestation. 
Illinois \1. P. Flint (September 13): Abundant rainfall throughout the State 
has caused a heavy growth of volunteer wheat. Apparently, eggs 
are being deposited :*n about normal, or a little more than normal, 
numbers in northern end southern Illinois, but very much less than 
normal numbers in the central part of the State, where the fly has 
been very scarce during the past season. 
Wisconsin A, A. Granovsky (August 29): The Hessian fly was observed, I 
believe, for the first tide in Door County during this year. It 
was quite destructive in several wheat fields and also attacked rye 
fields to some extent. It probably has been here for several years, 
but only this year was damage noticed. (September 15): This pest 
is not a serious factor in wheat production in this State. 
Minnesota A. G. Ruggles (September 29): The Hessian fly seems to be decidedly 
on the increase. Last year we found it doing considerable damage 
in one or two counties, while this year I have had reports frcm a 
number of counties, yet no reports on the extent of the damage done. 
Unfortunately, I have had no time to devote to the problem and have 
been unable to work out so far the fly-free dates. Practically all 
of these infested counties so far are in the southern part of the 
State and are in the region where winter wheat is being grown more 
and more extensively. 
Miswofcri A. F. Satterthwait and R. A. Blanchard (September 4) : Three fields 
at Pacific were left uncut because of the Hessian fly and Harmolita 
tritici combined. Dissection of flaxseeds shows an extremely small 
per cent of live Hessian fly forms. The majority of puparia were 
parasitized, while some dead, moldy ^.rvae were found. 
R. A, Blanchard (September 4): Infestation by the Hessian fly, as 
shown Dy examination of wheat stubble, is light in the vicinity of 
Webster Groves. Dissections of flaxseeds showed an extremely small 
percentage of live Hessian fly forms within the puparia. (September 
7): First eggs of the Hessian fly were found September 7. How- 
ever, upon examination of volunteer plants, several white larvae a 
week or so old were found. 
