. Class book of economic entomology, with special reference to the economic insects of the northern United States and Canada. Beneficial insects; Insect pests; Insects; Insects. CLASSIFICATION AND DESCRIPTION OF COMMON INSECTS 125 Adults.—Female scale oyster-shell shaped, narrow, }8~}io inch long, brownish-black; male scale smaller and ovate. Eggs.—Yellowish-white, laid in September-October under the female scale (50-60). Destroyed by a mite Hemisarcoptes malus. Nymphs.—The eggs hatch in late May or early June, or shortly after the apple blossoms fall, into active 6-legged pale yellowish larva
. Class book of economic entomology, with special reference to the economic insects of the northern United States and Canada. Beneficial insects; Insect pests; Insects; Insects. CLASSIFICATION AND DESCRIPTION OF COMMON INSECTS 125 Adults.—Female scale oyster-shell shaped, narrow, }8~}io inch long, brownish-black; male scale smaller and ovate. Eggs.—Yellowish-white, laid in September-October under the female scale (50-60). Destroyed by a mite Hemisarcoptes malus. Nymphs.—The eggs hatch in late May or early June, or shortly after the apple blossoms fall, into active 6-legged pale yellowish larvae, the females moulting twice and the males once. The exuviae are yellowish. Parasites.—Parasitized by Aphelinus, Mytilaspidis, Anaphes, and Chiloneurus and preyed upon by lady-birds, mites and Fig. 77.—Female San Jose scale, mature female insect removed from beneath it. Greatly enlarged. {After Alwood.) Scurfy Scale {Chionaspis furfur a Fitch).—^A native insect, occur- ring on pear, apple, gooseberry, and black currant. Adult.—^Scales white; female scale ovate, 2-3 mm. long, male scale smaller (i mm.) and 3-ridged with parallel sides (Fig. 80). Eggs.—Purplish-colored; laid in the early fall and found under the female scale in winter. Nymphs.—These hatch about the middle of June and the female larvae moult twice. The male has one moult. As in the case of the Oyster Shell Scale there is but one brood a season in the North and two in the South. Parasites.—Parasitized by Ablerus clisiocampcB How., a chalcid and preyed upon by Tyroglyphus malus and Chilocorus 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 Lochhead, William, 1864-. Philadelphia, Blakiston
Size: 1506px × 1659px
Photo credit: © The Book Worm / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1910, booksubjectinsects, bookyear1919
