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Image 54 of Annual report. 1908

Part of Kentucky Agricultural Experiment Station

rb A A Spraying Apple Treas. 35 · Q silk from an inner, oval, completely closed one surrounding the pupa. _ _ · it · It is secured by its entire length to twigs, and is a conspicuous ob- z 1 ject easily seen and recognized in winter. »- THE RED-NECKED APPLE·TREE CATERPILLAR. ` Y Q · (Datana ministra). l 0 { B A moderately large black caterpiller, loosely clothed with soft d it hairs, and marked with parallel longitudinal yellow stripes. Dis- p ,9 _ posed to be social, but makes no web. Adult a reddish brown moth. V H Q While this caterpillar has never proved common in my exper- lk . Q ience, it sometimes attacks a tree or two in nursery or orchard, and p , ln ] then strips whole branches, or the greater part of whole trees, of . lv g leaves. The caterpillar when at rest elevates both head and hind [L . end of thebody and has a habit of gathering in large masses on l Bd l, the trunks of trees. A 'similar but duller colored caterpillar ly (D. integcrrima) is very common on black walnut trees, to which In I it does a great deal of harm, and often renders them objectionable ‘, th \ about dwellings. F The species passes the winter in the pupa stage in the soil under Q trees, and comes up as a moth in late spring to place its eggs on the ` t leaves. Eggs examined were always in a single layer and on the un- _; der surface. They are white, smooth and very nearly spherical, but 3 ;ed l` under a magnifier are seen to be atrifie flattened where attached to T] ,0d the leaf and also at the free end, where they are provided with a LBS, V lid-like piece with a single median pit, giving the whole the appear- we A ance of a small bowl with cover. The adults appear about the trees in June and July, and seem md to produce but one brood of young during the summer. They ggs descend from the trees and go into the soil a few inches to pupate, L is in one case noted, on August 26, and in another, in 1893, during ap NGS A the first two weeks of September. 9 8 . . the Description. Btty l Egg.—VVhi~te, smooth, bowl-shaped, 0.0264 inch (0.66 mm.) in . diameter. } y Larva.— Clothed with long soft whitlsh hairs. Head shining BOD` black. Neck plate (dorsum of ilrst body somite) yellow. Body , 00Se black, with four yellow stripes along each side. Buea of jointed i l

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