. Insects injurious to fruits. Illustrated with four hundred and forty wood-cuts. Insect pests. 400 INSECTS INJURIOUS TO THE ORANGE, No. 255.—The Ribbed Scale. Icerya purchasi Maskell. The adult female of this species of Coccus is covered by an egg-sac, which is of a pale-yellowish color, longitudinally ribbed, a little longer than the body of the insect, and filled with a loose, white, cottony matter containing the eggs. A cluster of these sacs is shown in Fig. 410, of the natural size; ^ ,,^ the enclosed insect is of a Fig. 410. dark orange-red color, with black antennae and legs, its back b
. Insects injurious to fruits. Illustrated with four hundred and forty wood-cuts. Insect pests. 400 INSECTS INJURIOUS TO THE ORANGE, No. 255.—The Ribbed Scale. Icerya purchasi Maskell. The adult female of this species of Coccus is covered by an egg-sac, which is of a pale-yellowish color, longitudinally ribbed, a little longer than the body of the insect, and filled with a loose, white, cottony matter containing the eggs. A cluster of these sacs is shown in Fig. 410, of the natural size; ^ ,,^ the enclosed insect is of a Fig. 410. dark orange-red color, with black antennae and legs, its back being covered more or less with a white or yellow- ish-white powder. The eggs are said to num- ber from two hundred to five hundred in each cluster, and are of a pale-red color. The newlv-hatched larva is red- dish or brownish, with long and slender legs. As it grows it gradually changes, becom- ing darker in color and irreg- ular in outline, and it soon begins to excrete tufts of waxy matter along the back and sides, following which long, semi- transparent filaments appear. These insects first attack the leaves, usually along the midrib, and afterwards migrate to the twigs and branches, and sometimes attach themselves to the trunk. They spread with amazing rapidity on orange and lime trees, the trunks and limbs of which are sometimes so completely covered with them as to appear white; the leaves turn yellow and sickly, and if no remedial measures are adopted the trees sometimes die. The insect has been found very destructive at Santa Barbara, where it has probably been introduced with plants from 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 Saunders, William, 1836-1914. Philadelphia, J. B. Lippincott & Co
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Keywords: ., bookcentury1800, bookdecade1880, bookpublisherphila, bookyear1883
