. Injurious insects and the use of insecticides [microform] : a new descriptive manual on noxious insects, with methods for their repression . PART II. INSECTS INJURIOUS TO ORCHARD FRUITS. THE APPLE. THE CODLING-MOTH OR APPLE WORM. (Carppcapsa pomon el la.) This, the most insidious of all apple pests, was introduced fromEurope over a century ago and is now common wherever the apple isgrown, causing greater loss to orchardists than any other insect adult is a night-flying moth with a wing expanse of from one-halfto three-quarters of an inch. The fore wings are marked by alternatestrea
. Injurious insects and the use of insecticides [microform] : a new descriptive manual on noxious insects, with methods for their repression . PART II. INSECTS INJURIOUS TO ORCHARD FRUITS. THE APPLE. THE CODLING-MOTH OR APPLE WORM. (Carppcapsa pomon el la.) This, the most insidious of all apple pests, was introduced fromEurope over a century ago and is now common wherever the apple isgrown, causing greater loss to orchardists than any other insect adult is a night-flying moth with a wing expanse of from one-halfto three-quarters of an inch. The fore wings are marked by alternatestreaks of brown and gray, and at the outer extremity is a tawnybrown spot streaked with light bronze. The hind wings and under-parts are light brown and have a satin-like Fig. 38.—The Burrow, b. Point at which ■worm entered, e. Full-grown worm. d. Pupa. /.Moth with folded wings, g. Moth with expanded wings, h. Head and first divi-sion of body of worm, enlarged, i. Cocoon which encloses pupa, (miey.) 57 58 INJURIOUS INSECTS. The moths appear about the time the apple trees are female lays about fifty eggs, which are deposited singly in thecalyx end of the young apples. The eggs hatch in a week and the littlecaterpillars begin at once to gnaw through the young fruit to the mature caterpillar is about three-fourths of an inch long. It now leaves the heart of the apple and, secreted in crevices of thebark or among rubbish beneath the trees, spins a tough but slightsilken cocoon in which the pupal period—which lasts for a fortnight—is passed. At leasl: two broods are believed to develop each season. Remedies.—An old method for holding this insect in check is tofeed all the fallen apples to hogs and to place ban
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