A study of the oyster-shell scale, Lepidosaphes ulmi (L.), and one of its parasites, Aphelinus mytilaspidis Le B.
By: Grace H. Griswold
Series: Memoir / Cornell University Agricultural Experiment Station -- 93; Memoir (Cornell University. Agricultural Experiment Station) -- 93
Publisher: Cornell University
Published: 1925
Place of publication: Ithaca, N.Y
Language: eng
Number of pages: 67
Subjects: Oyster-shell scale; Parasites; Aphelinus
Notes: Bibliography: p. 66-67.
Table of contents: title: Part I. Biology and morphology of the two forms of the oyster-shell scale; title: Part II. Biology of a parasite of the oyster-shell scale.