Identification of immature and adult apterous forms of six small grain aphids (Homoptera: Aphididae)
Subtitle: Diuraphis noxia (Mordvilko), Schizaphis graminum (Rondani), Rhopalosiphum padi (L.), Rhopalosiphum maidis (Fitch), Sitobion avenae (F.), and Metopolophium dirhodum (Walker)
By: by Charles Edward Olsen.
Published: 1991
Language: eng
Number of pages: 65
Subjects: Aphids.
Notes: Typescript.

Thesis (M.S.)--Washington State University, 1991.

Includes bibliographical references (leaves 29-34).

WSU:"Department of Entomology."