Differential susceptibility of White Fir provenances to balsam twig aphid
By: George T. Ferrell
Contributors: Pacific Southwest Forest and Range Experiment Station (Berkeley, Calif.)
Series: Research note PSW -- 403
Publisher: U.S. Dept. of Agriculture, Forest Service, Pacific Southwest Forest and Range Experiment Station
Published: 1989
Place of publication: Berkeley, Calif
Language: eng
Format: Microform
Subjects: Abies concolor -- Diseases and pests -- West (U.S.); Aphids as carriers of disease -- West (U.S.)
Notes: Caption title

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Includes bibliographical references (p. 4)

Microfiche. [Washington, D.C.?] : Supt. of Docs., U.S. G.P.O., [1991] 1 microfiche : negative