Relation of Spruce Budworm Development and Balsam Fir Shoot Growth to Heat Units1

Author： CAMERON D. G.   MCDOUGALL G. A.   BENNETT C. W.  

Publisher： Entomological Society of America

ISSN： 1938-291X

Source： Journal of Economic Entomology, Vol.61, Iss.3, 1968-06, pp. : 857-858

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