. Agricultural entomology for students, farmers, fruit-growers and gardeners. Insects; Insects, Injurious and beneficial. 226 LEPIDOPTERA become fully developed, and drop to the ground by means of silken threads. They enter the ground for pupation and remain in the ground in the pupal stage through summer and fall and winter. The fall canker worm is almost the same so far as the life- cycle is concerned, except that the adults issue in fall. In this species the eggs remain over winter and hatch early in spring. Development is quite rapid and pupating is practi- cally the same as for the other
. Agricultural entomology for students, farmers, fruit-growers and gardeners. Insects; Insects, Injurious and beneficial. 226 LEPIDOPTERA become fully developed, and drop to the ground by means of silken threads. They enter the ground for pupation and remain in the ground in the pupal stage through summer and fall and winter. The fall canker worm is almost the same so far as the life- cycle is concerned, except that the adults issue in fall. In this species the eggs remain over winter and hatch early in spring. Development is quite rapid and pupating is practi- cally the same as for the other species. The wingless con- dition, and the fact that they must crawl up the trees, gives one method of treatment. Anything that will prevent their going up the tree will protect the trees. Bands of tar. Fig. 176.—Paleacrita rcrnata: a, larva—natural size; b, eggs—natural size and enlarged; c, side view of segment of larva; d, dorsal view of same —both enlarged. (From Riley, Div. Ent., U. S. Dept. Ag.) or oil on cotton will prevent their getting up the trunk of the trees. Small trees may be sprayed with arsenical solution as soon as they begin work in the spring. Noctuidse (owlet moths) include an immense number of common moths and a number of them very important species. The common name for the larval forms is cut worm. They differ from Geometers in adult characters and the wings are not so broad but fall close together on the back, sloping down the sides of the body. The hindwings are quite large but are not marked. The larvse are mostly without distinct coverings of hair, usually smooth and some of them subter- ranean in habit. One common and destructive species is the boll worm of the South, known in the North as the corn worm or tomato. 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 Osborn, Herb
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectinsects, bookyear1916
