. 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. 00 CORN AND GRASS. they may be found resting on the lower part of the culm of Wheat, with their heads downward, flying about, however, in great numbers near the ground when the stems are Cccidomyia tritici: 1, 6, infested floret; 2, 3, larva); 4, 5, case
. 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. 00 CORN AND GRASS. they may be found resting on the lower part of the culm of Wheat, with their heads downward, flying about, however, in great numbers near the ground when the stems are Cccidomyia tritici: 1, 6, infested floret; 2, 3, larva); 4, 5, cased larvoD or pupw, nat. size and magnified; 7 and 8, part of horns, magnified; 9,10, Wheat Midge, nat. size and mag. The females (see fig.) are furnished with a long ovipositor, as thin as a hair, which they can extend at pleasure, and tims insert their eggs inside the florets. The eggs are oblong and transparent, and (with the help of a glass) may be found in little patches of from one up to twenty in number. The maggots have been found ten days after the deposit of eggs was observed, some with their heads in the woolly top of the germ of the future grain, some inside the sheaths of the flower. The following notes from personal observation, sent me in 1883, by Mr. Eussell Swanwick, from the Eoyal Agricultural College Farm, Cirencester, are valuable in showing the time of day of appearance of the " Midge," and also the great amount of infestation which may take place from neighbouring land:— " The day before yesterday (July 1st), I examined some heads, and found a good many very small Wheat Midge grubs crawling about, chiefly inside the outside chaff) but very few actually attacking the grain, which was just beginning to form. There were a large number of Wheat Midges flying all about amongBt the Wheat-stalks, but being rather early in the evening they had not mounted to the heads. " I then searched the hedge-sides, amongst the grass, and found it as full o
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectentomology, bookyear1
