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. (P.O. Box 245, Berkeley 94701)
Language: eng
Subjects: Abies concolor -- Diseases and pests -- West (U.S.); Aphididae as carriers of disease -- West (U.S.)
Notes: "February 1989."