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Found 8 works matching this query
Oyster-shell scale and the scurfy scale
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The oyster-shell scale and the scurfy scale
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Three common orchard scales
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A study of the oyster-shell scale, Lepidosaphes ulmi (L.), and one of its parasites, Aphelinus mytilaspidis Le B.
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The San Jose scale, the oyster shell bark louse and the scurfy bark louse
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Three common insect pests of western Washington
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The oyster-shell scale (Lepidosaphes ulmi Linn.)
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O. A. C. Review Volume 22 Issue 6, March 1910
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