appearance and location of the mite predator Typhlodromus occidentalis on apple trees
By: S.C. Hoyt, A.H. Retan.
Series: Extension mimeo -- 2744.; Extension mimeo (Washington State University. Cooperative Extension) -- 2744.
Publisher: College of Agriculture, Cooperative Extension Service, Washington State University
Published: 1967
Place of publication: Pullman
Language: eng
Notes: Cover title.

"January, 1967."

"E.M. 2744."