Biology and control of douglas-fir needle midges in Christmas tree plantations.
Edition: Rev. Aug. 1980.
Series: Insect answers; Extension mimeo -- 4257.; Extension mimeo (Washington State University. Cooperative Extension Service) -- 4257.
Publisher: Cooperative Extension Service, College of Agriculture, Washington State University
Published: 1980
Place of publication: Pullman
Language: eng
Notes: Caption title.

"Prepared by  Arthur L. Antonelli"--P. 2.

"EM 4257"--P. [1].