Economic entomology for the farmer Economic entomology for the farmer and fruit-grower [microform] : and for use as a text-book in agricultural schools and colleges . economicentomolo00insmit Year: 1896 112 . AN ECONOMIC ENTOMOLOGY. cottony secretion becomes visible the female scale is less than one-eighth of an inch in length, very convex, a little irregular, and mahogany-brown in color. As the ito^^ mass increases in size the scale is lifted posteriorly, until finally the insect adheres only by its beak and by the sticky nature of the cottony mass. Fig. 84. Cottony maple scale.—a, leaf c
Economic entomology for the farmer Economic entomology for the farmer and fruit-grower [microform] : and for use as a text-book in agricultural schools and colleges . economicentomolo00insmit Year: 1896 112 . AN ECONOMIC ENTOMOLOGY. cottony secretion becomes visible the female scale is less than one-eighth of an inch in length, very convex, a little irregular, and mahogany-brown in color. As the ito^^ mass increases in size the scale is lifted posteriorly, until finally the insect adheres only by its beak and by the sticky nature of the cottony mass. Fig. 84. Cottony maple scale.—a, leaf covered with scales ; b, male scale ; c, adult male. We have other species of similar character in which there is no cottony mass protecting the eggs, but the life history is essen- tially the same. These ' soft scales' mostly belong to the genus Lecanium, and are much more common southwardly and in con- servatories. Citrus fruits and olives are especially subject to soft-scale attack, and the 'black scale,' Lecaiimm olecc, is in California the most troublesome of all and the most injurious. In the genus Ccroplastcs the scale is formed of waxv layers, sometimes quite pretty in pattern. These are found onlv in the extreme South, and are not especially troublesome. The matter of remedies will depend entirely upon circumstances. On garden plants or shrubs the scales may be mechanicallv removed during the winter. They do not adhere closelv, are easily dislodged, and are of a size sufficient to be readilv seen. Not all, however, pass the winter in the adult conditi(~)n. In some
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