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Filtering by: Subject Trees -- Diseases and pests -- United States Resource Type Journal

Some of the principal insect enemies of coniferous forests in the United States

Creator:

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

Abstract:

Reprint from Yearbook of Department of Agriculture for 1902.

Resource Type:

Journal

Full Text:

COMBATING THE PEST. EXPERIMENTS WITH GIRDLED TREES. —Experiments with girdled and felled trees, to
Insect injuries to forest products

Creator:

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

Abstract:

Reprint from Yearbook of Department of Agriculture for 1904.

Resource Type:

Journal

Full Text:

has taken place; other species are attracted only to dead bark and dead wood of trees which have been
Insect injuries to hardwood forest trees

Creator:

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

Abstract:

Reprint from Yearbook of Department of Agriculture for 1903.

Resource Type:

Journal
Notable depredations by forest insects

Creator:

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

Abstract:

Reprint from Yearbook of Department of Agriculture for 1907.

Resource Type:

Journal

Full Text:

trees in different sections of the United States and Canada and of the prevailing conditions as regards