| Show f 0 o I HOW HOP DOES DOr TILL TilE HOUSE FLY FIA 1 PASS SS THE WINTER R 1 MONTHS Where here does The tl the e annual 1 c crop of at lies come come from is a a question frequently fre- fre qU lr asked of oC the bureau o of en- en United States department ot of agriculture rh The opinion Prevailing through that the tho house fl Y lire a the win w t as s hi hiding ing Fn ra fa an cracks and amid clev crevices of appears to be erroneous Under outdoor U door con conditions Ota lies es are arc kill killed nw during house a. a tot fir real renI j i r V I u ly cold nights that nights that is when tb tb Jt temperature falls to about 15 ir tr 1 If J i degrees F. F In rooms and u places places' protected from win winds ds and ani pa par I heated during the wilt wInt a flies files ha have e been kept alive in cal for long periods but the they acre l lived ved through the entire Winter There is no reliable evidence wha ever that adult house flies em err ing during October and November r pass the winter and are able to a posit their eggs ggS the follo I spring although g h the they y ma may continue active in heated buildings unu UDia nearly the end of Januar January On QU i y j I other hand there is evidence the 1 house honse flies pass the winter as la larry larru and pupae and that they so som SOll- m. m times breed bree continuously II j z out the winter In r. r experIments experiment at both Dallas Texas and bond l. l Id Md ld house flies have hae been emerging during April from beau henn 7 infested manure heaps which h hi hit been set setout out and covered with caja during the preceding autumn n u uthe th the southern states during wan periods in midwinter house U I Ima ma may emerge and become somewhat son some so what tr troublesome the they frequent lay eggs on warm days The s second ond way in which tz tit tw house fly fry may pass the winter Is bj 1 continuous breeding House Honse fire congregate in heated rooms with t la is approach of the winter season i ino I no no food or breeding materials ira UI present they eventually die Ho Hos Hoa ever evert where the they have access u both food and suitable substance t for tor egg laying they will conta breeding just as they do outdoor during the h summer Even in ten reu cold climates there are undoubtedlY undoubted maIl many places especially in cities citte wh where re house flies would have hm 0 opportunity op or ty to pass the winter in tta 11 manner I |
