. Injurious insects : how to recognize and control them . Insect pests; Insect pests. 258 PESTS OF ORCHARD AND SMALL FRUITS The Oyster-shell Scale (Lepidosaphes idmi Linn.) The shape of this scale is quite like that of a narrow, miniature oj'ster shell. It is about one eighth of an inch long and is easUy ob- served without a lens. It commonly infests a great variety of deciduous trees and shrubs, and when very abundant, is capable of causing the death of its host. The j'oung scales ap- pear in jMay or June, crawl about over the bark for six or eight hours, and then insert their beaks, settle d
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. Injurious insects : how to recognize and control them . Insect pests; Insect pests. 258 PESTS OF ORCHARD AND SMALL FRUITS The Oyster-shell Scale (Lepidosaphes idmi Linn.) The shape of this scale is quite like that of a narrow, miniature oj'ster shell. It is about one eighth of an inch long and is easUy ob- served without a lens. It commonly infests a great variety of deciduous trees and shrubs, and when very abundant, is capable of causing the death of its host. The j'oung scales ap- pear in jMay or June, crawl about over the bark for six or eight hours, and then insert their beaks, settle down, and secrete the wax covering under which they remain for the rest of their life. The males are winged. Eggs are laid in fall, beneath the scale covering the female, and remain there until the next spring. In the South there are two broods; in the North one. Regular, annual spraj'- ing in winter with lime sulphur for San Jose scale will hold this insect sufficiently in check. For direct, remedial treatment of badly infested trees this wash is not sufficiently active or dependable. The only remedies that may be depended on are a spraying in early spring with linseed oil emulsion; or an application of 12 per cent kerosene emulsion at the. Fig. 351. — Oyster-shell Scale. Enlarged to twice natural size. Original.. 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 work.. O'Kane, Walter Collins, b. 1877. New York : The Macmillan Company