. Economic entomology for the farmer and fruit-grower [microform] : and for use as a text-book in agricultural schools and colleges . Oyster-shell scale, Mytilaspis pomorum.—a, female scale, from beneath, filled with eggs ; b, same, from above ; c, twig infested by female scales ; d, male scale and a twig infested therewith. Perhaps the most common forms of this series are the '' oyster- shell" bark-lice, of which we have several species, deriving their common name from the fact that the scales have a marked resem- blance to the shells of some oysters. In the Northern United States Mytila
. Economic entomology for the farmer and fruit-grower [microform] : and for use as a text-book in agricultural schools and colleges . Oyster-shell scale, Mytilaspis pomorum.—a, female scale, from beneath, filled with eggs ; b, same, from above ; c, twig infested by female scales ; d, male scale and a twig infested therewith. Perhaps the most common forms of this series are the '' oyster- shell" bark-lice, of which we have several species, deriving their common name from the fact that the scales have a marked resem- blance to the shells of some oysters. In the Northern United States Mytilaspis pomorum is the common form, infesting apple
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Keywords: ., bookcentury1800, bookdecade1890, bookpublisherphila, bookyear1896
