. Injurious insects : how to recognize and control them . Insect pests; Insect pests. The life round in this species is different from that of the spring canker-worm. The full-grown larva enters the soil to transform, but the adults emerge in the fall, instead of the spring. The female is wingless, and at once climbs the trunk and lays her eggs. These eggs remain over win- ter. They hatch in the spring, with the opening of the apple foliage. Spraying with arsenical poisons will control this species. If it is desired to control the pest by banding, it will be necessary to apply bands in the fal
. Injurious insects : how to recognize and control them . Insect pests; Insect pests. The life round in this species is different from that of the spring canker-worm. The full-grown larva enters the soil to transform, but the adults emerge in the fall, instead of the spring. The female is wingless, and at once climbs the trunk and lays her eggs. These eggs remain over win- ter. They hatch in the spring, with the opening of the apple foliage. Spraying with arsenical poisons will control this species. If it is desired to control the pest by banding, it will be necessary to apply bands in the fall, so as to prevent the females from crawling up to the higher parts of the tree, and to renew the bands in the spring to prevent the young worms from ascending. The females, if stopped in the fall by bands, will lay eggs below the ob- structions, and thus further . banding at the hatching sea- son in the spring is essential. The Currant Spanworm (Cymatophora ribearia Fitch) This worm is one of the loopers or measuring worms. Fig. 408. — Eggs of the Fall Canker-worm. Enlarged and natural size. Original. fS"^ Fig. 410. — Adult of the Currant Span- worm. Original. 409. — The Currant Spanworm. Slightly enlarged. Original. It is a little over an inch long when mature, is light yellow- ish or cream colored, and dot- ted with black. The worms appear in early spring from eggs laid on the stems the previous summer by the par- ent moth. When they are very abundant, the fohage is destroyed by 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 O'Kane, Walter Collins, b. 1877. New York : The Macmillan Company
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectinsectp, bookyear1912
