The Use of Balsam Fir Shoot Elongation for Timing Spruce Budworm Aerial Spray Programs in the Lake States

Author: BEAN J. L.  

Publisher: Entomological Society of America

ISSN: 1938-291X

Source: Journal of Economic Entomology, Vol.54, Iss.5, 1961-10, pp. : 996-1000

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