Publisher's Synopsis
This historic book may have numerous typos and missing text. Purchasers can usually download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1921 edition. Excerpt: ...are green with black tips, and are shorter than the body, and the eyes, legs and tail are Aphis brassicce Linn. Family Aphididce. See C. V. Riley, Report of U. S. Commissioner of Agriculture, 1884, p. 317. C. M. Weed, "Insect Life," Vol. Ill, p. 289. G. W. Herrick, Bulletin 300, Cornell Univ. Expt. Station. F. H. Chittenden and C. H. Popenoe, Bulletin 2, Va. Truck Exp. Sta., p. 22. black. The young when first hatched are oval, shining, bright yellow in color, and lack the mealy coat. The winged viviparous female is yellowish-green, with the eyes, neck and thoracic lobes black, and the antennae and nectaries dark brown. The legs are dusky brown and hairy; the tail is dark green or brown and also hairy; the wings are rather short, with stout coarse veins and dark stigma." (Riley). Life History.--Though the cabbage-aphis is an old European species and was observed in this country as early as the latter part of the eighteenth century, its life history has only recently been carefully worked out by Professor G. W. Herrick and Mr. J. W. Hungate of Cornell University (I.e.), from whose account the following is taken: The oviparous females appear in the fall and are fertilized by the males, and deposit their eggs in large numbers on the leaves of the cabbage, during October and the first days of November, in central fci-/ VAJ rS"rV New York-The eggs-t!s J _ Jjy J are laid on rape, turnip, brussels sprouts and kohl-rabi but are most abundant on cabbage, particularly in the crevices and depressions of the under surfaces of the leaves. On leaves taken at random from a badly infested patch, from 177 to 293 eggs were found on a leaf. Two to three eggs are laid by each oviparous female. When first laid the eggs are a...
