The Hessian Fly and How to Prevent Losses from It Page: 10
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Farmers' Bulletin 1083.
by growers for the Hessian fly. Much of this confusion may be
obviated if search is made for an insect like that shown in figures 10
and 11, but very minute and somewhat resembling a mosquito.
During warm days, in the egg-laying season, the flies may be
observed flying about
in the young wheat,
alighting upon the
leaves. On cooler
da y s, or in early
morning while a
heavy dew is on, they
are down among the
leaves or even on the
ground. The adult
A flies live only a few
days, depending
somewhat upon tem-
Sperature conditions.
EFFECT OF THE
WEATHER ON
THE HESSIAN
FLY.
All who have
FIG. 10.-The Hessian fly: Adult female. Greatly enlarged. studied the Hessian
studied the Hessian
fly carefully under various field conditions during a series of years
have noted that
weather condi-
tions have an
important in-
fluence on the e
insect, fand in
the application
of preventive
measures these
weather condi-
tions become of
vital impor-
tance.
Many wheat
growers believe
in the effective-
ness of cold
weather or even
of frosts in ter- FIG. 11.-The Hessian fly: Adult male. Greatly enlarged.
minating the activities of the flies in the fall, and it is for this reason
that many growers try'to delay wheat sowing until after there has10
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Walton, William Randolph, 1873-1952. The Hessian Fly and How to Prevent Losses from It, pamphlet, 1924; Washington D.C.. (https://digital.library.unt.edu/ark:/67531/metadc97227/m1/10/: accessed April 25, 2024), University of North Texas Libraries, UNT Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.