Direct Control of Western Pine Beetle (Dendroctonus Brevicomis LeConte) PDF Download
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Author: Richard H. Smith
Publisher:
ISBN:
Category : Western pine beetle
Languages : en
Pages : 16
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Book Description
Nearly 70 years of research and application are reviewed and assessed. Results of direct control projects can be characterized as generally effective, temporary, quite variable, and unpredictable in reducing subsequent tree mortality. Some causes of this characterization are variable and difficult stand conditions and logistics, lack of good beetle population measurements and prediction, unknown attributes of tree and stand dynamics and of beetle population dynamics, and unforeseen post-application factors. The control method used did not appreciably change this characterization: fell-peel-bum, salvage logging, penetrating oil, residual toxic sprays, or attractive pheromones. Use of attractive pheromones was never thoroughly analyzed, and use of baited toxic trap trees was never adequately tested; both should be done.
Author: Richard H. Smith
Publisher:
ISBN:
Category : Western pine beetle
Languages : en
Pages : 16
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Book Description
Nearly 70 years of research and application are reviewed and assessed. Results of direct control projects can be characterized as generally effective, temporary, quite variable, and unpredictable in reducing subsequent tree mortality. Some causes of this characterization are variable and difficult stand conditions and logistics, lack of good beetle population measurements and prediction, unknown attributes of tree and stand dynamics and of beetle population dynamics, and unforeseen post-application factors. The control method used did not appreciably change this characterization: fell-peel-bum, salvage logging, penetrating oil, residual toxic sprays, or attractive pheromones. Use of attractive pheromones was never thoroughly analyzed, and use of baited toxic trap trees was never adequately tested; both should be done.
Author: Richard H. Smith
Publisher:
ISBN:
Category : Western pine beetle
Languages : en
Pages : 10
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Author: Richard H. Smith
Publisher:
ISBN:
Category : Forest insects
Languages : en
Pages : 10
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Category : Bark beetles
Languages : en
Pages : 60
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Category : Forests and forestry
Languages : en
Pages : 474
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Author: Willard Joseph Chamberlin
Publisher:
ISBN:
Category : Western pine beetle
Languages : en
Pages : 32
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Category : Sandalwood
Languages : en
Pages : 108
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Book Description
Sandalwood (Santalum spp.) trees grow in a variety of climates around the world and are culturally and economically important to about 15 countries. Exploitation of the fragrant heartwood for carvings, oil, and incense in the past has led to the need to conserve and manage the genus. The first substantial logging of sandalwood in Hawaii in 150 years generated local controversy in 1988, uncovered misinformation and speculation about the genus, and eventually led to the symposium in 1990. Papers in this proceedings cover history, distribution, status, ecology, management, propagation, and use of sandalwood. A synthesis paper summarizes the state-of-knowledge of the symposium participants. Research is needed to fill gaps in information on various aspects of sandalwood in many of the countries where it grows.
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Category : Bird populations
Languages : en
Pages : 16
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The marbled murrelet (Brachyramphus marmoratus), a seabird, nests in forested stands from southeast Alaska south to Santa Cruz, California. Because of this species' close association with old-growth forests, researchers and land managers need a method to assess murrelet distribution and use patterns throughout its range. This guide describes a standardized method for surveying marbled murrelets used by researchers in California and Oregon during 1988 and 1989. Transects can be used to assess activity patterns over large blocks of land, such as States or counties. Stationary counts using an intensive inventory method can be used to survey small acreages, such as individual timber sales. In addition to bird counts, vegetation and physical data should be collected at each census point. The guide includes a form that can be used to design studies and determine activity patterns and potential use.
Author: Robert Livingston Furniss
Publisher:
ISBN:
Category : Forest insects
Languages : en
Pages : 672
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ISBN:
Category : Agriculture
Languages : en
Pages : 666
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