Insect pests of farm, garden and orchard . fly it fec^ds and breeds upon wild grasses andis thus much more difficult to control. Prof. .\. J. Cook foundthe larvae in bollibarley anfl oats inMichigan, Prof. Webster rearedan adult from bhicgrass {l*oa pralen-sis), and Dr. J records itas b r V e d i n g inAqropijrmn, , Elynius,Poa, and Setariaviridis in Canada. Ldfe History.—Like the Hessianfly the adult flieslay their eggs onfall wheat in Sep-tember and Octo-ber, and the young maggots when hatched work their waydown into the stem, either cutting it off or causing it
Insect pests of farm, garden and orchard . fly it fec^ds and breeds upon wild grasses andis thus much more difficult to control. Prof. .\. J. Cook foundthe larvae in bollibarley anfl oats inMichigan, Prof. Webster rearedan adult from bhicgrass {l*oa pralen-sis), and Dr. J records itas b r V e d i n g inAqropijrmn, , Elynius,Poa, and Setariaviridis in Canada. Ldfe History.—Like the Hessianfly the adult flieslay their eggs onfall wheat in Sep-tember and Octo-ber, and the young maggots when hatched work their waydown into the stem, either cutting it off or causing it to discoloror die. The eggs are about one-fortietli of an inch long andof a, glistening whiti; color. ilic larva; are a light greenishcolor, about ones-fourth of an inch long, tapering toward theterminal end while subcylindrical posteriorly, being quite elon-gate. The pupse are the same color as the larva), but morerounded, being only one-sixth of ;iri inch long, and reveal thelegs and wing-cases of the imago ff)rming within them. The. i;. .}(\. l)iilli-\\i)riii (Mernmyza americana):(I, rri;itur<! fly; h, l;irv;i; c, pupariiim; of, infoHtedw^lOMt-st,f,m—all oniargod except d. (AfterMarlatt, U. S. Dopt. Agr.) 134 INSECT PESTS OF FARM, GARDEN AND ORCHARD
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