File:San Jose scale and its control (1910) (14803711903).jpg

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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Text Appearing Before Image:
)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 with
Text Appearing After Image:
Fig. :J.—Appoaniiico of llie Sun Jose scale, cnliirged ahout 4 (iiiies; (o tlio ri^^hl, on poach; to (he loft, on apple. (Orifjinal ) the rcniaics the males (he. The icmahs coiitimic to grow and inahout a mouth begin the pnxhiction of living young—uiiiuitc, yidlow,oval creatures, which by very close obscMwation may be (hstiuguishcdicir. rjii without the aid of a hand lens, crawhng here and there on the in-fested phxnts in an effort to find a suitable ))lace for settlement. Theyoung insect is aetive for some hours but soon settles, pushes itsslender, threadlike ))eak into the plant, and begins to feed by suckingout the sap. After tliis there is no further movement from place toplace, and the waxy covering, which often begins to develop beforethe insect has settled, soon covers it completel). In about twelve days the insects molt and from this time on themale and female scales may be readily distinguished. Eight or tendays later the males change to pupae, and in from twenty-four tot

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