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	Provedor de dados AgEcon (12) Ecology and Society (1) Autor Bangsund, Dean A. (12) Leistritz, F. Larry (12) Sell, Randall S. (5) Hodur, Nancy M. (4) Nudell, Daniel J. (4) Leitch, Jay A. (3) Hyder, Ayaz; McGill University; ayaz.hyder@mail.mcgill.ca (1) Leung, Brian; McGill University; brian.leung2@mcgill.ca (1) Miao, Zewei; Rutgers University; zmiao@rci.rutgers.edu (1) Mais... Palavra-chave Leafy spurge (13) Resource /Energy Economics and Policy (9) Rancher opinion (8) Weed management (7) Farm Management (5) Noxious weeds (5) Biological control (3) Control (3) Economic impacts (2) Land Economics/Use (2) Public land manager opinions. (2) Upper Midwest (2) Apthona lacertosa/czwalinae (1) Crop Production/Industries (1) Decision theory (1) Economics (1) Flea beetle (1) Herbicides (1) Local decision maker opinion (1) Management (1) Mais... Tipo do documento Working or Discussion Paper (12) Peer-Reviewed Reports (1) Ano 2008 (1) 2004 (1) 2002 (3) 1999 (1) 1998 (4) 1997 (2) 1996 (1) Mais... País United States (12) Canada (1) Idioma Inglês (13)		Ordenar por:  Relevância Autor Título Ano Registros recuperados: 13 Primeira ... 1 ... Última Integrating Data, Biology, and Decision Models for Invasive Species Management: Application to Leafy Spurge (Euphorbia esula) Ecology and Society Hyder, Ayaz; McGill University; ayaz.hyder@mail.mcgill.ca; Leung, Brian; McGill University; brian.leung2@mcgill.ca; Miao, Zewei; Rutgers University; zmiao@rci.rutgers.edu. Invasive species are a major cause of environmental change and are often costly to control. Decision theory should offer managers guidance to formulate the optimal allocation of resources. Unfortunately, current decision theory models typically do not consider invasion dynamics and do not make full use of the best models of biological spread and best biological data from theoretical models. We developed a decision theory model that integrated population dynamics, spread, uncertainty, and changes in management policies. We applied this model to leafy spurge (Euphorbia esula), a high-priority invasive weed in North America. We used field data to construct a biological model that included stochastic population dynamics and spatial spread and integrated it... Tipo: Peer-Reviewed Reports Palavras-chave: Decision theory; Leafy spurge; Management; Stochastic dynamic programming. Ano: 2008 PREDICTED FUTURE ECONOMIC IMPACTS OF BIOLOGICAL CONTROL OF LEAFY SPURGE IN THE UPPER MIDWEST AgEcon Bangsund, Dean A.; Leistritz, F. Larry; Leitch, Jay A.. The Leafy Spurge Biological Control program was designed to use insects and plant diseases from the plant's original European habitat to control infestations in the United States. The widespread adoption of biological agents to combat leafy spurge and the initial success in reclaiming previously infested land has prompted an evaluation of the potential future economic benefits of the biological control of leafy spurge in the Upper Midwest. Based on expert opinion and historical data, leafy spurge in Montana, North Dakota, South Dakota, and Wyoming was projected to infest 1.85 million acres, of which, 65 percent was estimated to controlled with biological agents by 2025. Based on a survey of county weed board personnel, North Dakota and Wyoming are... Tipo: Working or Discussion Paper Palavras-chave: Biological control; Leafy spurge; Economic impacts; Upper Midwest; Resource /Energy Economics and Policy. Ano: 1997 URL: http://purl.umn.edu/23130 PERCEPTIONS OF LEAFY SPURGE BY PUBLIC LAND MANAGERS, LOCAL DECISION MAKERS, AND RANCH OPERATORS; SUMMARY AgEcon Sell, Randall S.; Bangsund, Dean A.; Leistritz, F. Larry; Nudell, Daniel J.. A survey of 459 ranchers, 56 local decision makers, and 50 public land managers (565 total) was conducted to evaluate managerial, institutional, and social factors that may affect the rate and extent of implementation of various leafy spurge (Euphorbia esula L.) controls. The study focused on a five-county region in Montana, North Dakota, South Dakota, and Wyoming. The questionnaire focused on weed management in general and specifically on the perceptions and attitudes of ranchers, land managers, and local decision makers who have been directly and indirectly affected by leafy spurge. Tipo: Working or Discussion Paper Palavras-chave: Leafy spurge; Weed management; Rancher opinion; Public land manager opinions.; Farm Management; Resource /Energy Economics and Policy. Ano: 1998 URL: http://purl.umn.edu/23236 ECONOMIC ANALYSIS OF HERBICIDE CONTROL OF LEAFY SPURGE (EUPHORBIA ESULA L.) IN RANGELAND AgEcon Bangsund, Dean A.; Leitch, Jay A.; Leistritz, F. Larry. Leafy spurge (Euphorbia esula L.), a widely established exotic, noxious, perennial weed, is a major threat to the viability of commercial grazing and beneficial outputs of wildlands in the Upper Great Plains. Herbicide treatments are often recommended based upon measures of physical control rather than on economic criteria. Considering the wide geographic variation of leafy spurge infestations, the range of herbicide control alternatives, and the long-term consequences this weed creates, a need exists to assess the economics of herbicide control. A deterministic, bioeconomic model was developed to evaluate the economic viability of current herbicide control strategies for leafy spurge. Only under liberal assumptions and optimistic projections does... Tipo: Working or Discussion Paper Palavras-chave: Leafy spurge; Herbicides; Control; Economics; Resource /Energy Economics and Policy. Ano: 1996 URL: http://purl.umn.edu/23314 PERCEPTIONS OF LEAFY SPURGE AND EVALUATION OF THE TEAM LEAFY SPURGE PROJECT BY PUBLIC LAND MANAGERS, LOCAL DECISION MAKERS, AND RANCH OPERATORS--SUMMARY AgEcon Leistritz, F. Larry; Hodur, Nancy M.; Bangsund, Dean A.. Leafy spurge is an exotic, noxious, perennial weed which is widely established in the north central United States and is an especially serious problem in the northern Great Plains (Bangsund et al. 1999). In 1997, the Agriculture Research Service and Animal Plant Health Inspection Service, U.S. Department of Agriculture, initiated a major Integrated Pest Management (IPM) research and demonstration project to develop and demonstrate ecologically based IPM strategies that can produce effective, affordable leafy spurge control. In 1998 and 1999, a survey of ranchers and public land managers was conducted to evaluate managerial, institutional, and social factors that might affect the rate and extent of implementation of various control strategies. In... Tipo: Working or Discussion Paper Palavras-chave: Leafy spurge; Noxious weeds; Weed management; Rancher opinion; Land Economics/Use. Ano: 2002 URL: http://purl.umn.edu/23544 ASSESSMENT OF THE EXTENT AND SUCCESS OF LEAFY SPURGE BIOLOGICAL CONTROL AGENTS AgEcon Hodur, Nancy M.; Leistritz, F. Larry; Bangsund, Dean A.. Leafy spurge is an exotic, noxious, perennial weed which is widely established in the north central United States and is an especially serious problem in the northern Great Plains. In 1997, the Agricultural Research Service and the Animal and Plant Health Inspection Service of the U.S. Department of Agriculture (USDA), initiated a major Integrated Pest Management (IPM) research and demonstration project, TEAM Leafy Spurge (TLS), to develop and demonstrate ecologically based IPM strategies that can produce effective, affordable leafy spurge control. A key component of the project was to expand the use of biological control (biocontrol) agents, specifically flea beetles. To assess the level of insect establishment and the level of current and perceived... Tipo: Working or Discussion Paper Palavras-chave: Leafy spurge; Biological control; Apthona lacertosa/czwalinae; Flea beetle; Noxious weeds; Weed management; Resource /Energy Economics and Policy. Ano: 2004 URL: http://purl.umn.edu/23643 PERCEPTIONS OF LEAFY SPURGE BY PUBLIC LAND MANAGERS, LOCAL DECISION MAKERS, AND RANCH OPERATORS AgEcon Sell, Randall S.; Bangsund, Dean A.; Leistritz, F. Larry; Nudell, Daniel J.. A survey of 459 ranchers, 56 local decision makers, and 50 public land managers (565 total) was conducted to evaluate managerial, institutional, and social factors that may affect the rate and extent of implementation of various leafy spurge (Euphorbia esula L.) controls. The study focused on a five-county region in Montana, North Dakota, South Dakota, and Wyoming. The questionnaire focused on weed management in general and specifically on the perceptions and attitudes of ranchers, land managers, and local decision makers who have been directly and indirectly affected by leafy spurge. Tipo: Working or Discussion Paper Palavras-chave: Leafy spurge; Weed management; Rancher opinion; Public land manager opinions.; Farm Management; Resource /Energy Economics and Policy. Ano: 1998 URL: http://purl.umn.edu/23399 RANCH OPERATORS' PERCEPTIONS OF LEAFY SPURGE AgEcon Sell, Randall S.; Bangsund, Dean A.; Leistritz, F. Larry; Nudell, Daniel J.. A survey of 459 ranchers was conducted to evaluate managerial, institutional, and social factors that may affect the rate and extent of implementation of various leafy spurge (Euphorbia esula L.) controls in a five-county region in Montana, North Dakota, South Dakota, and Wyoming. Ranchers returned 187 questionnaires. Weeds were considered a greater problem for ranchers with leafy spurge than for those without leafy spurge; however, even among ranchers with leafy spurge, there was strong agreement that other ranching issues were of greater concern. Over 65 percent of the respondents indicated that weeds on their ranch were a `minor problem.' Leafy spurge was ranked as the most important weed. Nearly 60 percent of ranchers felt that using herbicides,... Tipo: Working or Discussion Paper Palavras-chave: Leafy spurge; Control; Rancher opinion; Farm Management; Resource /Energy Economics and Policy. Ano: 1998 URL: http://purl.umn.edu/23456 RANCH OPERATORS' PERCEPTIONS OF LEAFY SPURGE; SUMMARY AgEcon Sell, Randall S.; Bangsund, Dean A.; Leistritz, F. Larry; Nudell, Daniel J.. A survey of 459 ranchers was conducted to evaluate managerial, institutional, and social factors that may affect the rate and extent of implementation of various leafy spurge (Euphorbia esula L.) controls in a five-county region in Montana, North Dakota, South Dakota, and Wyoming. Ranchers returned 187 questionnaires. Weeds were considered a greater problem for ranchers with leafy spurge than for those without leafy spurge; however, even among ranchers with leafy spurge, there was strong agreement that other ranching issues were of greater concern. Over 65 percent of the respondents indicated that weeds on their ranch were a `minor problem.' Leafy spurge was ranked as the most important weed. Nearly 60 percent of ranchers felt that using herbicides,... Tipo: Working or Discussion Paper Palavras-chave: Leafy spurge; Control; Rancher opinion; Farm Management; Resource /Energy Economics and Policy. Ano: 1998 URL: http://purl.umn.edu/23186 RANCH OPERATORS' PERCEPTIONS OF LEAFY SPURGE MANAGEMENT AND EVALUATION OF THE TEAM LEAFY SPURGE PROJECT AgEcon Hodur, Nancy M.; Leistritz, F. Larry; Bangsund, Dean A.. Leafy spurge is an exotic, noxious, perennial weed which is widely established in the north central United States and is an especially serious problem in the northern Great Plains (Bangsund et al. 1999). In 1997, the Agriculture Research Service and the Animal and Plant Health Inspection Service, U.S. Department of Agriculture, initiated a major Integrated Pest Management (IPM) research and demonstration project to develop and demonstrate ecologically based IPM strategies that can produce effective, affordable leafy spurge control. In 1998 and 1999, a survey of ranchers and public land managers was conducted to evaluate managerial, institutional, and social factors that might affect the rate and extent of implementation of various control strategies.... Tipo: Working or Discussion Paper Palavras-chave: Leafy spurge; Noxious weeds; Weed management; Rancher opinion; Crop Production/Industries. Ano: 2002 URL: http://purl.umn.edu/23522 PERCEPTIONS OF LEAFY SPURGE BY RANCH OPERATORS AND LOCAL DECISION MAKERS: AN UPDATE AgEcon Sell, Randall S.; Bangsund, Dean A.; Leistritz, F. Larry. A survey of 476 ranchers and 45 local decision makers (LDM) (521 total) was conducted to evaluate managerial, institutional, and social factors that may affect the rate and extent of implementation of various leafy spurge (Euphorbia esula L.) controls. The respondents represented a four-county region in Montana and North Dakota and are compared and contrasted to a group of ranchers and LDM from surrounding counties surveyed in 1998. The questionnaire focused on weed management in general and specifically on the perceptions and attitudes of ranchers and LDM who have been directly and indirectly affected by leafy spurge. Overall, the updated survey results reveal that ranchers and LDM had fewer problems with all noxious weeds, including leafy spurge than... Tipo: Working or Discussion Paper Palavras-chave: Leafy spurge; Weed management; Rancher opinion; Local decision maker opinion; North Dakota; Montana; Noxious weeds; Farm Management; Resource /Energy Economics and Policy. Ano: 1999 URL: http://purl.umn.edu/23097 PERCEPTIONS OF LEAFY SPURGE AND EVALUATION OF THE TEAM LEAFY SPURGE PROJECT, BY PUBLIC LAND MANAGERS, LOCAL DECISION MAKERS, AND RANCH OPERATORS AgEcon Hodur, Nancy M.; Leistritz, F. Larry; Bangsund, Dean A.. Leafy spurge is an exotic, noxious, perennial weed which is widely established in the north central United States and is an especially serious problem in the northern Great Plains (Bangsund et al. 1999). In 1997, the Agriculture Research Service and Animal Plant Health Inspection Service, U.S. Department of Agriculture, initiated a major Integrated Pest Management (IPM) research and demonstration project to develop and demonstrate ecologically based IPM strategies that can produce effective, affordable leafy spurge control. In 1998 and 1999, a survey of ranchers and public land managers was conducted to evaluate managerial, institutional, and social factors that might affect the rate and extent of implementation of various control strategies. In... Tipo: Working or Discussion Paper Palavras-chave: Leafy spurge; Noxious weeds; Weed management; Rancher opinion; Land Economics/Use. Ano: 2002 URL: http://purl.umn.edu/23539 PREDICTED FUTURE ECONOMIC IMPACTS OF BIOLOGICAL CONTROL OF LEAFY SPURGE IN THE UPPER MIDWEST; SUMMARY AgEcon Bangsund, Dean A.; Leistritz, F. Larry; Leitch, Jay A.. The Leafy Spurge Biological Control program was designed to use insects and plant diseases from the plant's original European habitat to control infestations in the United States. The widespread adoption of biological agents to combat leafy spurge and the initial success in reclaiming previously infested land has prompted an evaluation of the potential future economic benefits of the biological control of leafy spurge in the Upper Midwest. Based on expert opinion and historical data, leafy spurge in Montana, North Dakota, South Dakota, and Wyoming was projected to infest 1.85 million acres, of which, 65 percent was estimated to controlled with biological agents by 2025. Based on a survey of county weed board personnel, North Dakota and Wyoming are... Tipo: Working or Discussion Paper Palavras-chave: Biological control; Leafy spurge; Economic impacts; Upper Midwest; Resource /Energy Economics and Policy. Ano: 1997 URL: http://purl.umn.edu/23232 Registros recuperados: 13 Primeira ... 1 ... Última

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