. A manual of injurious insects [microform] : with methods of prevention and remedy for their attacks to food crops, forest trees, and fruit : to which is appended a short introduction to entomology. Insect pests; Agricultural pests; Entomology; Insectes nuisibles, Lutte contre les; Ennemis des cultures, Lutte contre les; Entomologie. fRiT FLY. 7S present in France, Germany, and Sweden, where it attacks both Oats and Barley. With us the attack has, as far as I am aware, be^n almost entirely confined to Oats and is caused by the maggot feeding in the heart of the young Corn-plant a little above
. A manual of injurious insects [microform] : with methods of prevention and remedy for their attacks to food crops, forest trees, and fruit : to which is appended a short introduction to entomology. Insect pests; Agricultural pests; Entomology; Insectes nuisibles, Lutte contre les; Ennemis des cultures, Lutte contre les; Entomologie. fRiT FLY. 7S present in France, Germany, and Sweden, where it attacks both Oats and Barley. With us the attack has, as far as I am aware, be^n almost entirely confined to Oats and is caused by the maggot feeding in the heart of the young Corn-plant a little above ground-level, and eating away the centre, so that the shoot above the eaten part is destroyed, and the damage that is going forward then becomes noticeable from the injured shoots turning brown and withering, instead of continuing their _ Oscinis vastator: perfect fly, nat. size and magnified; and attacked plant, with maggot inside. (The Oscinis vastator of Curtis bears such a strong resem- blance to the Oscinis frit—e\en if it is not absolutely the same—that I have used Curtis's figure to give the appearance of the insect and its method of mjury). The maggot is about the eighth of an inch long, whitish, legless, cylindrical, bluntly pointed at the head-end, which is furnished with a strong pair of curved mouth-hooks, and on each side near the head it has a branched spiracle. At the blunt hinder extremity it has two projecting wart-like spiracles. The chrysalis is rather smaller than the maggot, cylin- drical, and rather more pointed at the front than at the hinder extremity, which, from the strong projection of the two wart-like processes, has the appearance of being cleft, or almost bluntly forked, and for a time, after the maggot has changed to the chrysalis state, the branched external spiracles (or air-tubes) on each side of the head-extremity are very plainly observable. In 1888, the only year in which we have record of this attack being prevalent to an obse
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectentomology, bookyear1
