Log Bioassay Of Residual Effectiveness Of Insecticides Against Bark Beetles
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Log Bioassay Of Residual Effectiveness Of Insecticides Against Bark Beetles
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Author : Richard Harrison Smith
language : en
Publisher:
Release Date : 1982
Log Bioassay Of Residual Effectiveness Of Insecticides Against Bark Beetles written by Richard Harrison Smith and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1982 with Bark beetles categories.
Residual effectiveness of nine insecticides applied to bark was tested against western, mountain, and Jeffrey pine beetles. Ponderosa and Jeffrey pine trees were treated and logs cut from them 2 to 13 months later, and bioassayed with the three beetles. The insecticides were sprayed at the rate of 1 gal (3.8 l) per 40- or 80-ft2 (3.6 or 7.2 m2) bark surface at varying concentrations. Effectiveness of treatment was based on reduction in length of egg galleries 2 to 3 weeks after initiating bioassay. All chemicals were quite effective for 2 to 13 months, except for malathion and Imidan which were relatively ineffective, depending largely on concentration and application rate. On the basis of equivalent amounts of lindane, the ranking ofeffectiveness ofinsecticides tested was as follows: (a) on western pine beetle: decamethrin> permethrin> lindane> Reldan> Dursban Sumithion> Sevin; (b) on mountain pine beetle: decamethrin> permethrin> lindane> Dursban Reldan> Sevin> Sumithion; (c) on Jeffrey pine beetle: decamethrin> permethrin> lindane> Sevin. The residual effectiveness of lindane was about doubled by adding 2 percent molasses, and high pH of water reduced effectiveness of Sevin. Other application parameters had little effect.
Seed Dissemination In Small Clearcuttings In North Central California
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Author : Philip M. McDonald
language : en
Publisher:
Release Date : 1980
Seed Dissemination In Small Clearcuttings In North Central California written by Philip M. McDonald and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1980 with Clearcutting categories.
In a 1964-1967 study on the Challenge Experimental Forest, seedfall was evaluated in 2-, 5-, and 10-acre circular clearcuttings. During the 4 years, 10 seed crops, ranging from light to bumper, were produced by ponderosa pine. white fir, Douglas-fir, and incense cedar. Seedfall ranged from 76 to 40,691 sound seed per acre (188 to 100,547/ha) for a single species in a given year. From 89 to 100 percent of each species' seed fell within an area 1 1/2 times the height of the average dominant tree. Overall, seed distribution was highly variable.
Pesticidal Pollution Of Environment And Control
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Author : K. V. Paliwal
language : en
Publisher: M.D. Publications Pvt. Ltd.
Release Date : 1994
Pesticidal Pollution Of Environment And Control written by K. V. Paliwal and has been published by M.D. Publications Pvt. Ltd. this book supported file pdf, txt, epub, kindle and other format this book has been release on 1994 with Science categories.
In this annotated bibliography, an attempt has been made to summarise the international research experience up to date covering various aspects of environmental degradation, by pesticides and organic chemicals and its control. Broadly, it enlists adsorption-desorption behaviour of soils; microbial activity, degradation and bio-remedition; soil, water and atmospheric pollution; agricultural activity; crop rotation; climate run off and water pollution; disease, pest control and plant protection measures.
Monthly Catalog Of United States Government Publications
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Author : United States. Superintendent of Documents
language : en
Publisher:
Release Date : 1985
Monthly Catalog Of United States Government Publications written by United States. Superintendent of Documents and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1985 with Government publications categories.
February issue includes Appendix entitled Directory of United States Government periodicals and subscription publications; September issue includes List of depository libraries; June and December issues include semiannual index
Monthly Catalogue United States Public Documents
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Author :
language : en
Publisher:
Release Date : 1985-07
Monthly Catalogue United States Public Documents written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1985-07 with Government publications categories.
Research For Tomorrow S Forests
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Author :
language : en
Publisher:
Release Date : 1984
Research For Tomorrow S Forests written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1984 with Forests and forestry categories.
Trapping Western Pine Beetles With Baited Toxic Trees
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Author : Richard Harrison Smith
language : en
Publisher:
Release Date : 1986
Trapping Western Pine Beetles With Baited Toxic Trees written by Richard Harrison Smith and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1986 with Beetles categories.
Research Note Psw
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Author :
language : en
Publisher:
Release Date : 1978
Research Note Psw written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1978 with Forests and forestry categories.
Pollution Abstracts
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Author :
language : en
Publisher:
Release Date : 1984
Pollution Abstracts written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1984 with Pollution categories.
Indexes material from conference proceedings and hard-to-find documents, in addition to journal articles. Over 1,000 journals are indexed and literature published from 1981 to the present is covered. Topics in pollution and its management are extensively covered from the standpoints of atmosphere, emissions, mathematical models, effects on people and animals, and environmental action. Major areas of coverage include: air pollution, marine pollution, freshwater pollution, sewage and wastewater treatment, waste management, land pollution, toxicology and health, noise, and radiation.
Residual Activity Of Carbaryl Protected Lodgepole Pine Against Mountain Pine Beetle Dillon Colorado 1982 And 1983
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Author : Marion Page
language : en
Publisher:
Release Date : 1985
Residual Activity Of Carbaryl Protected Lodgepole Pine Against Mountain Pine Beetle Dillon Colorado 1982 And 1983 written by Marion Page and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1985 with Lodgepole pine categories.
The mountain pine beetle (Dendroctonus ponderosae Hopkins) is the most destructive insect that attacks lodgepole pine (Pinus contorta Dougl.), a species valued for multiple uses throughtout North America. The effective residual life of carbaryl, applied as a 2 percent suspension of Sevimol to the bark of lodgepole pine to prevent attack by mountain pine beetle, was evaluated near Dillon, Colorado. Trees (9,568) treated in 1982 under operational conditions were used to assess the efficacy of the treatment for one and two beetle flight periods after insecticide application. Estimated mortality of untreated trees was 0.91 percent compared with 0.074 percent for trees treated 16 months earlier with carbaryl. Residues of carbaryl were estimated at 359 ppm 16 months after application. When exposed to intense beetle pressure, bolts from trees treated 13 months earlier suffered fewer attacks and had shorter mean egg gallery length than did bolts from untreated trees; bolts from trees sprayed 3 months earlier suffered no attacks. Apparently a 2 percent suspension of carbaryl applied to the bole of lodgepole pine was effective in protecting lodgepole pine from mountain pine beetle for the flight period 3 months after application and even provided protection for a second flight period 16 months after treatment. I The results suggest that protection cost and I insecticide use could be reduced by 50 percent during a 4-year outbreak.