Date of Award:

5-1-1964

Document Type:

Thesis

Degree Name:

Master of Science (MS)

Department:

Biology

Department name when degree awarded

Entomology

Committee Chair(s)

Donald W. Davis

Committee

Donald W. Davis

Committee

Datus M. Hammond

Committee

Orson S. Cannon

Committee

Richard I. Washburn

Abstract

Economic importance Anacomptodes clivinaria (Genee) is a serious pest of curlleaf mountain mahogany (Cercocarpus ledifolius) and bitterbrush (Prushia tridentata). Mountain mahogany and bitterbrush are important browse plants for wildlife and for watershed protection. In the winter, curlleaf mountain mahogany may serve as the major food source for wildlife because the leaves are retained year around (Flook, 1955). The deer and antelope winter ranges are some of the limiting factors in herd size and must be protected. Smith (1957) reported that curlleaf mountain mahogany has one of the highest percent nutrients of any winter browse plant for deer. His study showed digestible nutrients per hundred pounds of curlleaf mountain mahogany was 65.5 pounds as compared to 68.9 pounds for common millet hay or 53.8 pounds for bunchgrass hay. Evergreens usually suffer more severely from defoliation than deciduous trees (Anderson, 1960).

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