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Filtering by: Has journal Plant Physiology Creator Hopkins, A. D. (Andrew Delmar), 1857 1948 Decade 1900-1909

Insect enemies of the spruce in the Northeast : a popular account of results of special investigations, with recommendations for preventing losses

Creator:

Hopkins, A. D. (Andrew Delmar), 1857-1948 and United States. Division of Entomology

Resource Type:

Technical Report

Full Text:

infested with a caterpillar and a plant-louse_ 74 XIV.—Dead spruce: also fir and birch _ 76 XV:—Timber