Accuracy of Direct Visual Counts of Western Spruce Budworm Larvae (Lepidoptera: Tortricidae) on Douglas Fir and Grand Fir Branches

Author: Foltz John L.   Torgersen Torolf R.  

Publisher: Entomological Society of America

ISSN: 1938-291X

Source: Journal of Economic Entomology, Vol.78, Iss.5, 1985-10, pp. : 1056-1058

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