Evaluation of the possible role of predaceous ants in the management of pear psylla, Cacopsylla pyricola (Foerster) (Homoptera:Psyllidae)
By: by Gregory Stephen Paulson.
Published: 1990
Language: eng
Number of pages: 79
Subjects: Pear -- Diseases and pests.; Psylla.; Ants.
Notes: Typescript.

Thesis (Ph. D.)--Washington State University, 1990.

Includes bibliographical references.

WSU:Another copy on microfilm, no. 6951.

WSU:"Department of Entomology."