. Class book of economic entomology, with special reference to the economic insects of the northern United States and Canada. Beneficial insects; Insect pests; Insects; Insects. i88 ECONOMIC ENTOMOLOGY ferens, and C. agrestis are recognized as destructive to grain, alfalfa, beets and flax in the West in Montana and Alberta. The larvae begin to mature about the middle of May but pupation m earthen cells does not occur until the middle of June. The moths fly from June 15th- Sept. 30th and the eggs are laid from August 24th-October 15th in the soil in weedy summer-fallows. Porosagrotis delorala S
. Class book of economic entomology, with special reference to the economic insects of the northern United States and Canada. Beneficial insects; Insect pests; Insects; Insects. i88 ECONOMIC ENTOMOLOGY ferens, and C. agrestis are recognized as destructive to grain, alfalfa, beets and flax in the West in Montana and Alberta. The larvae begin to mature about the middle of May but pupation m earthen cells does not occur until the middle of June. The moths fly from June 15th- Sept. 30th and the eggs are laid from August 24th-October 15th in the soil in weedy summer-fallows. Porosagrotis delorala Sm. is injurious to wheat in June. In British Columbia Euxoa excellens Grote injures market gardens, and Neuria procin-cta Grote injures farm crops (Fig. 127). Glassy Cutworm (Sidemia devastator Brace).—Translucent whitish, tinged with bluish-green and without spots; tubercles brown, each with a single hair; head reddish-brown; neckshield brownish. Active in. Fig. 126.—a, Moth of Glassy Cutworm (Sidemia devastator); b, larva. (After Gibson, Bui. lo, Ent. Br. Can.) May and early June on hay and garden vegetables. Difficult to kill by poison bait on account of its underground feeding habit (Fig. 126). Yellow-headed Cutworm (Scptis arctica Bdv.).—Pale smoky grey, with head and neck shield tawny-yellow; without spots, 139 inches long. in July on cereal crops and vegetables (Fig. 127). Bronze Cutworm (Xephelodes emmedonia Gn.).—^Large, i^^ inches long, with alternate stripes of olive-bronze and yellowish, a pale stripe along the middle of the back, and two others on each side. Active in grass lands in April and May. Zebra Caterpillar {Ccramica picta Harris).—"Velvety black on the back; beautifully ornamented with two golden-yellow stripes on each side of the body, which are connected by narrow lines of the same color;. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and app
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectinsects, bookyear1919
