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Sampling Windbreaks For Borers And Defoliators, Judith E. Pasek

Judith E Pasek

Development of sampling methods to detect, assess, and study insect populations in windbreaks depends upon knowledge of insect life cycles, habits, and distributions, habitat characteristics, and sampling objectives. Techniques ranging from detection surveys to population estimates have been developed for cankerworms, pine tip moths, carpenterworms, and lilac borers.

Populations Of Douglas-Fir Beetle In Scorched And Green Trees 2 Years Following The Clover Mist Fire On The Clarks Fork Ranger District, Shoshone National Forest, Wyoming, Judith E. Pasek

Judith E Pasek

In 1990, Douglas-fir beetle (DFB), Dedroctonus pseudotsugae Hopkins spread from Douglas-firs blackened by the 1988 Clover Mist Fire to partially scorched and green trees on the Clarks Fork Ranger District, Shoshone National Forest in northwestern Wyoming. Adult DFB began emerging in early May and peaked during June. Scorched trees were attacked first and green trees were selected generally after mid-June. A mean of 20 DFB emerged per 36 sq. in. of heavily-infested bark surface.

Total brood production in fall bark samples taken at 5-7 ft. was high, averaging 28 DFB per 36 sq. in., and represents a 1.5- to 2-fold …