Transplanting ants to pear orchards for psylla control
By: [by Roger D. Akre and G. S. Paulson.
Contributors: Paulson, Gregory S.; Washington State University. Cooperative Extension.; United States. Dept. of Agriculture.
Series: Insect answers; Extension bulletin -- 1590; Extension bulletin (Washington State University. Cooperative Extension) -- 1590.
Publisher: Cooperative Extension, College of Agriculture and Home Economics, Washington State University
Published: 1991
Place of publication: Pullman
Language: eng
Subjects: Psylla -- Biological control; Pear -- Diseases and pests -- Control; Insects as biological pest control agents
Notes: Title from caption.

"Published August 1991"--P. [4].

"Issued by Washington State Cooperative Extension and the U.S. Department of Agriculture"--P. [4].