. 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. 226 ECONOMIC ENTOMOLOGY cocoon within a tube of tangled leaves. Pupal stage lasts about lo days. Life-history.—Hibernates as a half-grown larva, and matures in June; pupal stage lasts lo days and moth emerges in July to deposit eggs. Young caterpillars feed on epidermis of under side of leaf and on green tissue within a silken tube for protection. Toward the end of September they leave their silken tubes and form oval
. 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. 226 ECONOMIC ENTOMOLOGY cocoon within a tube of tangled leaves. Pupal stage lasts about lo days. Life-history.—Hibernates as a half-grown larva, and matures in June; pupal stage lasts lo days and moth emerges in July to deposit eggs. Young caterpillars feed on epidermis of under side of leaf and on green tissue within a silken tube for protection. Toward the end of September they leave their silken tubes and form oval silken cases on the smaller twigs near the buds, where they hibernate (Fig. 139).. Fig. 140.—Pea moth: a, a full grown "worm" or caterpillar (enlarged); b, adult moth with wings expanded (enlarged); c. adult moth with wings closed; d, a group of five peas injured by the caterpillar of the pea moth. Parasites.—Pimpla conquisitor, Bassus earinoides, Trichogramma pretiosa {Pentarthron minutum), Opius sp., Microdus laticinctus. Control.—Spray with arsenate of lead when buds are expanding, when the leaves are expanded, and before and after blossoming. ArgyroploceconsanguinanaWdX'i\\s, another bud pest of occasional importance. Pea Moth {Laspeyresia nigricana Steph.). Adult.—K small grey moth % inch long. July (Fig. 140). J. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Lochhead, William, 1864-. Philadelphia, Blakiston
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectinsects, bookyear1919
