Insect pests of farm, garden and orchard . bum) and careless weed {A mnranthus) and will probably feedon many other crops. It is a native of western and centralEurope, and northern Asia, and was evidently introduced on thePacific Coast, as it was noted in Utah in 1869. The moth is larger than the garden webworm, having a wingexpanse of an inch, and is a purpHsh-brown color with darkerand paler bands as shown in Fig. 239. The -full-grown larva isabout an inch long, of a dark color with a white stripe down the * Loxostege sticticalis Linn. P^amily Pyraustidae. See C. P. Gillette,Bulletin 98, Col
Insect pests of farm, garden and orchard . bum) and careless weed {A mnranthus) and will probably feedon many other crops. It is a native of western and centralEurope, and northern Asia, and was evidently introduced on thePacific Coast, as it was noted in Utah in 1869. The moth is larger than the garden webworm, having a wingexpanse of an inch, and is a purpHsh-brown color with darkerand paler bands as shown in Fig. 239. The -full-grown larva isabout an inch long, of a dark color with a white stripe down the * Loxostege sticticalis Linn. P^amily Pyraustidae. See C. P. Gillette,Bulletin 98, Colo. Agr. Exp. Sta., and references there given. INSECTS INJURIOUS TO BEETS AND SPINACH 333 back and one along either side, and marked with numerousbUick and white tubercles as illustrated. Life History.—The larvse hibernate over winter an inch ortwo below the surface of the soil in long silken tubes. In springthey pupate in these tubes and the moths emerge about the middleof May. The eggs are laid on the foliage either singly or in clus-. FiG. 239.—The svip;ar-beet vvebworm (Loxostege sticticalis Linn.): 1, moth; 2,eggs; 3, 4, larvse; fi, pupa; 6, winter tube of larva, opened at a to showpupa—1, 3, 4, 5, enlarged. (After Gillette, Colo. Agr. Exp. Sta.) ters of from three to ten, one overlapping another. The eggis broadly oval, one twenty-fifth inch long, and of a palegreen color. The first generation of caterpillars feed on pig-weed and alfalfa in Colorado during June. A second generationof larvse occurs about the middle of July and sometimes injuresbeets, but the third geneiation a]x)ut the middle of August is 334 INSECT PESTS OF FARM, GARDEN AND ORCHARD the one most injurious in Colorado. Most of these larvae hibernateover winter, but there is a partial fourth generation in Colorado-The larvse defoliate the plants, and cover them with a web thesame as the native garden webworm, with which the life historyseems to be practically identical. Control.—The same means of con
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