. Eastern forest insects. Forest insects. yellow stripe down the middle of the venter. There is a pair of prolegs, one on each of the eighth and anal segments. Spring cankerworms do not spin cocoons but spend most of the winter as larvae in cells in the soil. Pupation occurs in late win- ter, and the adults appear about the time frost leaves the ground in early spring. Female moths crawl up the trunks of trees and deposit loose clusters of 100 or more eggs in bark crevices or under bark scales on the trunk or branches. Hatching occurs by early May and the larvae become full-grown by early June
. Eastern forest insects. Forest insects. yellow stripe down the middle of the venter. There is a pair of prolegs, one on each of the eighth and anal segments. Spring cankerworms do not spin cocoons but spend most of the winter as larvae in cells in the soil. Pupation occurs in late win- ter, and the adults appear about the time frost leaves the ground in early spring. Female moths crawl up the trunks of trees and deposit loose clusters of 100 or more eggs in bark crevices or under bark scales on the trunk or branches. Hatching occurs by early May and the larvae become full-grown by early June. Then they drop to and enter the soil where they remain until late winter or the following spring. Like the fall cankerworm, this species is an important pest of shade trees and in forested areas. Fall and spring cankerworm populations are normally kept under control by natural control factors. Outbreaks often occur, however, over large areas. Isolated trees can be protected by placing sticky bands around the trunks so as to prevent female moths from climbing them to lay their eggs. (72U). The linden looper, Erannis tiliaria Harr., occurs in southeast- ern Canada and throughout eastern United States. The larvae feed on the foliage of a wide variety of hardwoods, especially basswood, elm, hickory, maple, oak, birch, and apple. The female adult is light gray to brownish, wingless, about 12 mm. long, and is marked with black spots on the sides and back. Male moths have fully developed wings with an expanse of about 42 mm. The forewings are buff-colored and marked with two transverses, wavy brown bands and a sprinkling of brownish dots. Full-grown larvae (fig. 130) are bright yellow, have rusty brown heads, and 10 wavy black lines running down the dorsum. They are about 37 mm. long. COURTESY CONN. AGR. EXPT. STA. Figure 130.—Larvae of the linden looper, Erannis tili-. Please note that these images are extracted from scanned page images that may have been digitally enhanced for r
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Keywords: ., bookcentury1900, bookcollectionbiodive, booksubjectforestinsects
