. Common injurious insects of Kansas. Insect pests. .Fig. 41. Spring Canker-worm; a, larva; b, magnified egg and a small cluster of eggs; c, magni- fied portion of side of larva, and d, same of back, showing mark- ings. Description and Life-history.—The adult insect is a brownish- gray moth (male), with wings expanding about one inch. The fore wings have darker markings, and the hind wings are light gray with a dusky central dot. The female is wingless, having a peculiar, spider-like appearance. She is from three- to four-tenths of an inch in length. The moths issue in early spring from chrysa
. Common injurious insects of Kansas. Insect pests. .Fig. 41. Spring Canker-worm; a, larva; b, magnified egg and a small cluster of eggs; c, magni- fied portion of side of larva, and d, same of back, showing mark- ings. Description and Life-history.—The adult insect is a brownish- gray moth (male), with wings expanding about one inch. The fore wings have darker markings, and the hind wings are light gray with a dusky central dot. The female is wingless, having a peculiar, spider-like appearance. She is from three- to four-tenths of an inch in length. The moths issue in early spring from chrysalids which have passed the winter in the ground. The female crawls up the tree and deposits her eggs in small masses on the twigs or branches. The young larvae or caterpillars issue just as the leaves begin to unfold from the bud. The young larva is " dark olive-green or brown in color, with a black, shin- ing ; The larvse feed vora- ciously, and in Kansas are usually full-grown by the middle of May, when they enter the ground to pupate- They remain in the ground as chrysa- lids until the following spring; a few, however, probably issue in the fall of the first year. The larva or "worm" is about one inch long; the head mottled and spotted; the body is longitudinally striped with many pale lines. When in large numbers, this pest may so com- pletely defoliate an orchard as to leave the trees as if swept by fire. Two or three successive visitations of the pest in large numbers generally kill the infested trees. Remedies.—The Canker-worm is a great favorite with insectiv- orous birds, more than fifty species of birds which feed on the worms being enumerated by Maynard. Spraying with London purple (see p. 8) or Paris green (see p. 7) is probably the most effective remedy. The spraying should be done soon after the worms hatch. Preventing the ascent of the wingless female up the tree trunks. Please note that these images are extracted from scanned page im
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