. Insect pests of farm, garden and orchard . th to South America, it has been mostinjurious from Nebraska southward and cast to Mississippi and * Loxostege similalis Gn. Family Pyrnustidoe. See C. V. Riley, ReportU. S. Comm. Agr. for 1885, p. 265; Sanderson, Bulletin 57, Bureau of Ento-mology, U. S. Dept. Agr., p. 11. MISCELIANEOUS GARDEN INSECTS 407 Illinois. The hirvio feed uoriually on the pigweed or carelessweed (Amaranthus spp.) from wliieli they sometimes receive thelocal name of careless worm, and only when they becomeoverabundant on these weeds do they usually increase sufficientlyto m
. Insect pests of farm, garden and orchard . th to South America, it has been mostinjurious from Nebraska southward and cast to Mississippi and * Loxostege similalis Gn. Family Pyrnustidoe. See C. V. Riley, ReportU. S. Comm. Agr. for 1885, p. 265; Sanderson, Bulletin 57, Bureau of Ento-mology, U. S. Dept. Agr., p. 11. MISCELIANEOUS GARDEN INSECTS 407 Illinois. The hirvio feed uoriually on the pigweed or carelessweed (Amaranthus spp.) from wliieli they sometimes receive thelocal name of careless worm, and only when they becomeoverabundant on these weeds do they usually increase sufficientlyto migrate from them and attack crops. The moth is a yellowish, buff or grayish-brown color, markedas shown in Fig. 294, and with a wing expanse of about three-quarters of an inch. The larva also varies in color from pale andgreenish-yellow to dark yellow, and is marked with numerousblack tubercles as shown in Fig. 294, b, c. Life Histonj.—The hil)ernating habits are not known, ])ut fromanalogy with the beet webworm, and the appearance of the. Fig. 294.—The garden webworm (Loxostege similalis Gn.): a, male moth;b, c, larvae; d, anal segment of same; e, abdominal segment of same fromside; /, pupa; g, tip of abdomen of same; a, b, c, f, somewhat enlarged;d, e, g, more enlarged. (After Riley and Chittenden, U. S. Dei)t. Agr.) moths, it seems pro])able that the winter is passed Ijy the larvaeor pupjB in the soil. The moths appear in Texas by mid-Apriland in Central Illinois in late May and early June. The yellowisheggs are laid on the foliage in small patches of from S to 20 andin Texas hatch in three or four days. The larva3 of the firstgenerations feed on weeds or alfalfa, where it is growai, and thenmigrate to corn and cotton or garden truck, the former cropsbeing attacked when six or eight inches high. In feeding thecaterpillars spin a fine web, which gradually envelops the plant,of which nothing is left but the skeletons of the leaves w^hen thelarvae are abundant. The larvae b
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