. Elementary textbook of economic zoology and entomology. Zoology; Insect pests. 454 ECONOMIC ZOOLOGY AND ENTOMOLOGY associated with the black scale, but is easily distinguished be- cause of its reddish-brown or yellowish color and by minute darker spots or bars on its dorsal surface which may form more or less distinct radiating lines. It is elongate oval in shape. It is often very abundant on the trees, where it does con- siderable damage by taking sap from the plant. This species is attacked by three or four kinds of internal parasites that usually keep it well in control, so that the growe
. Elementary textbook of economic zoology and entomology. Zoology; Insect pests. 454 ECONOMIC ZOOLOGY AND ENTOMOLOGY associated with the black scale, but is easily distinguished be- cause of its reddish-brown or yellowish color and by minute darker spots or bars on its dorsal surface which may form more or less distinct radiating lines. It is elongate oval in shape. It is often very abundant on the trees, where it does con- siderable damage by taking sap from the plant. This species is attacked by three or four kinds of internal parasites that usually keep it well in control, so that the grower does not often have to resort to sprays or fumigation. The Red Scale of California (Chrysomphalus auranti.}— This is one of the most destructive scale insects in FIG. 215.—Red scale, Chrysomphalus auranti, on lemon leaf. (Enlarged; after Quayle, photo by Doane.) Unlike the black scale it does not secrete the honey-dew in which the sooty mold grows, but the direct effect of the attack on the tree is much more serious. It attacks all parts of the tree, trunk, branches, twigs, leaves and fruit. The trees are often killed within two or three years after the first infestation if they are not properly cared for. Even when the insects. 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 Kellogg, Vernon L. (Vernon Lyman), 1867-1937; Doane, Rennie Wilbur, 1871-. New York, H. Holt and company
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