. Economic entomology for the farmer and fruit-grower [microform] : and for use as a text-book in agricultural schools and colleges . Woolly apple-louse, Schizonetira lanigera: show- ing a group of specimens on bark, a crevice on a branch, in which they congregate, and a winged form. Fig. 98. singly in the bark crevices during win- ter, completely envel- oped in the dry skin of the female, and from them appear, in spring, agamic, wing- less forms, which bear living young. This method of reproduc- tion continues until the winged type, which spreads to other localities, is produced in late summe
. Economic entomology for the farmer and fruit-grower [microform] : and for use as a text-book in agricultural schools and colleges . Woolly apple-louse, Schizonetira lanigera: show- ing a group of specimens on bark, a crevice on a branch, in which they congregate, and a winged form. Fig. 98. singly in the bark crevices during win- ter, completely envel- oped in the dry skin of the female, and from them appear, in spring, agamic, wing- less forms, which bear living young. This method of reproduc- tion continues until the winged type, which spreads to other localities, is produced in late summer. The sexed forms are wingless and mouthless, the female producing only a single egg ; but in the southern parts of our country it
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Photo credit: © The Bookworm Collection / Alamy / Afripics
License: Licensed
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Keywords: ., bookcentury1800, bookdecade1890, bookpublisherphila, bookyear1896
