. The Hessian fly in Ontario [microform]. Flies; Hessian flies; Mouches; Insect pests; Mouche de Hesse; Insectes nuisibles. Dmcripiioit. ThomM $»7, an Amerimn, published the first desoription of the fly in 1817, »nd gftve it the â oientific name o( Cfidomyia Fiff. 1. ^, male Hessian Fly, much enlarged : B, female, also much enlarf^ed; C, emj; D, raa«rg<it : E, Haxseed stage; F, piece of stalk showinfr Hy, natural size, laying egg* ; G, stalk of wheat injured at a, oy the Hy. The tine lines beside C, D, and E show the true length of these stages, the drawines being enlarged.
. The Hessian fly in Ontario [microform]. Flies; Hessian flies; Mouches; Insect pests; Mouche de Hesse; Insectes nuisibles. Dmcripiioit. ThomM $»7, an Amerimn, published the first desoription of the fly in 1817, »nd gftve it the â oientific name o( Cfidomyia Fiff. 1. ^, male Hessian Fly, much enlarged : B, female, also much enlarf^ed; C, emj; D, raa«rg<it : E, Haxseed stage; F, piece of stalk showinfr Hy, natural size, laying egg* ; G, stalk of wheat injured at a, oy the Hy. The tine lines beside C, D, and E show the true length of these stages, the drawines being enlarged. (Modified from Kiley.) (Bulletin 4«, Penn. Dept. of Agriculture, Harrisburg, Pa., by Dr. H. T. Fernald.) There are foar distinct stages in each generation of this insect, viz., the egg, the larva or maggot, the pupa, and the aduU. 1. The adalt insect is a Rot â¢te: tigi Wh tia hei of flei yea froi wh( iftl. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Lochhead, William, 1864-1927; Ontario Agricultural College. Toronto : Dept. of Agriculture
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectinsectp, bookyear1901
