Identifier: sanjosescaleitsc00unit (find matches)
Title: San Jose scale and its control
Year: 1910 (1910s)
Authors: United States.: Bureau of Entomology
Subjects: San José scale--Control San José scale.
Publisher: Washington, D.C. : U.S. Dept. of Agriculture
Contributing Library: University of Florida, George A. Smathers Libraries
Digitizing Sponsor: University of Florida, George A. Smathers Libraries with support from LYRASIS and the Sloan Foundation

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-aying. The cliaracter of injury to an aj)ple orchard, in which the treeswere infested from outside sources Ioui or live years earlier, is shownin figure 2. Although many of the limbs and branches are injuiedor killed, such trees may be saved and brought into vigorous condi-tion by thorough pruning, and by insuring the control of the insc^ctin the future. (Cir. lliM THE INSECT DESCRIBED. The mature San Jose scale is small, grayish in color, circular inoutline, somewhat convex, and with a nipplelike prominence in thecenter. The female scale is about 1 millimeter in diameter (about thesize of a ))m head): the male scale is much smaller and elongate. (Seefig. 3.) The insect itself is beneath the so-called scale, this beingsim()lv a waxy covering secreted by the soft, helpless, yellow lousefor its own protection. ^Miere trees and plants are but slightlyinfested its presence is not readily detected by the casual observer,but in the case of severe infestation the bark of tlie tree and limbs
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Fig. 2.—Appearance of an apple orchard badly infested by the San Jose scale; many of the lini))S and l)ranches killed. (Oritnnal.) will present an ash-gray appearance, an (I on ( loser examination w be found thoroughly incrusted with the scales, which, when scrapedwith a knife, will produce a yellowish, oily fluid. Wien the scalesare abundant on the tree the foliage also will be thoroughly infested,giving it a spotted and diseased appearance readily o))servable somefeet awav. NATURAL HISTORY AND HABITS. The San Jose scale passes the winter in an immature conditionfixed to the ))ark of the host plant, the small, dark-gray or l)lackishscales being just discernible with the unaided eye. In early sj)ring, (Cir. 124) with the ascent of the trees sap, the giowth of the scale bof^ins,and early in April in the latitude of Washington the small, two-winged, active males issue from the male scales. After mating withsanjosescaleitsc00unit

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