Life Sciences Commons^™

Emergence And Overwintering Brood Of Douglas-Fir Beetle Six Years After The Clover Mist Fire On The Clarks Fork Ranger District, Shoshone National Forest, Wyoming, Judith E. Pasek, Willis C. Schaupp Jr

Judith E Pasek

Two emergence peaks were evident for adult Douglas-fir beetles (DFB), Dendroctonus pseudotsugae Hopkins, collected from caged brood trees in 1994. The June peak resembled emergence patterns observed in previous years; however, an August peak was detected for the first time since monitoring of the outbreak began. The second peak likely resulted from delayed development of brood of the '93-'94 generation that largely overwintered as larvae. A portion of the '92-'93 generation also emerged in 1994, confirming that DFB can extend its life cycle to two years under certain conditions. The '93-'94 generation apparently also has developed an extended life cycle, …

Emergence And Overwintering Brood Of Douglas-Fir Beetle Five Years After The Clover Mist Fire On The Clarks Fork Ranger District, Shoshone National Forest, Wyoming, Willis C. Schaupp Jr, Judith E. Pasek

Judith E Pasek

The emergence of adult Douglas-fir beetles (DFB), Dendroctonus pseudotsugae Hopkins, from caged brood trees in 1993, occurred from May to September, with a peak in mid- to late June. The 1993 emergence pattern is very similar to that observed in 1990 and 1992. In late fall 1993, live DFB adults were found under the bark of trees from which emergence was presumed to have been complete, because the trees had been attacked during summer of 1992. For the '92-'93 DFB generation, emerging adults were far fewer than overwintering brood, suggesting poor winter survival and/or a shift to a 2-year life …

G95-1251 Biological Control Of Insect And Mite Pests, Robert J. Wright

University of Nebraska-Lincoln Extension: Historical Materials

The advantages and disadvantages of the three forms of biological control of insect and mite pests -- classical, augmentation and conservation -- are discussed.

Biological control is the conscious use of living beneficial organisms, called natural enemies, to control pests. Biological control should be an important part of any integrated pest management program, an approach which combines a variety of pest control methods to reduce pest levels below an economic threshold. Virtually all insect and mite pests have some natural enemies. Managing these natural enemies can effectively control many pests. Often the use of insecticides or other practices can injure …

Rocky Mountain Region Aerial Survey Program, Judith E. Pasek

Judith E Pasek

Summary of a presentation given at the 1994 Aerial Pest Detection and Monitoring Workshop.