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Registros recuperados: 10
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Biotechnology and Pest Resistance: An Economic Assessment of Refuges AgEcon
Hurley, Terrance M.; Babcock, Bruce A.; Hellmich, Richard L..
Biologists now engineer transgenic crop varieties that express proteins that are toxic to a variety of common agricultural pests. These transgenic crops offer farmers a new tool for effectively managing pests that reduce yields and increase production costs. However, the concern over pest resistance to these toxins has prompted the EPA to require resistance management plans. Seed companies have focused on a high-does refuge plan where farmers are required to plant a constant proportion of cropland in refuge in order to maintain a susceptible pest population. Currently, entomologists recommend 20 to 40% refuge. This paper develops an economic model of pest management with pest resistance to estimate the constant proportion of refuge that maximizes farm...
Tipo: Working or Discussion Paper Palavras-chave: Research and Development/Tech Change/Emerging Technologies.
Ano: 1997 URL: http://purl.umn.edu/18632
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BIOTECHNOLOGY AND PEST RESISTANCE: AN ECONOMIC ASSESSMENT OF REFUGES AgEcon
Hurley, Terrance M.; Babcock, Bruce A.; Hellmich, Richard L..
Transgenic crops offer farmers a new and effective pest control option. However, the wide spread adoption of these crops could lead to a resistant pest population. This paper demonstrates how a pest refuge can be used to maximise the value of farm income in a dynamic model with genetic foundations.
Tipo: Conference Paper or Presentation Palavras-chave: Crop Production/Industries; Research and Development/Tech Change/Emerging Technologies.
Ano: 1998 URL: http://purl.umn.edu/21000
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BT CORN AND INSECT RESISTANCE: AN ECONOMIC ASSESSMENT OF REFUGES AgEcon
Hurley, Terrance M.; Babcock, Bruce A.; Hellmich, Richard L..
Genetically engineered crops offer farmers a new option for controlling pests. The high efficacy of these pesticidal crops, combined with the potential for widespread adoption, has raised concerns that pest resistance may prematurely diminish their value. In response to these concerns, the Environmental Protection Agency requires resistance management plans. Current resistance management plans rely on a high-dose refuge strategy. This analysis extends the current framework for evaluating high-dose refuge strategies to include a measure of agricultural productivity and conventional pesticide use. The economic tradeoff relative to agricultural productivity, conventional pesticide use, and pest resistance is assessed when Bt corn is planted to control...
Tipo: Journal Article Palavras-chave: Crop Production/Industries.
Ano: 2001 URL: http://purl.umn.edu/31156
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ECONOMIC EVALUATION OF BT CORN REFUGE INSURANCE AgEcon
Mitchell, Paul D.; Hurley, Terrance M.; Hellmich, Richard L..
The EPA has imposed mandatory refuge requirements for Bt crops to prolong the efficacy of Bt. Growers have no economic incentive to plant the required refuge because refuge crops are on average less productive and more risky. This paper evaluates refuge insurance--insurance that pays indemnities for yield losses on refuge due to insect damage--as a tool to increase grower compliance incentives. We determine actuarially fair insurance premiums, then evaluate the feasibility of private provision of refuge insurance and its impact on grower incentives to comply with refuge requirements. A private market for refuge insurance appears unlikely because our analysis suggests that even a 2% load on the actuarially fair premium makes growers unwilling to buy...
Tipo: Conference Paper or Presentation Palavras-chave: Research and Development/Tech Change/Emerging Technologies; Risk and Uncertainty.
Ano: 2000 URL: http://purl.umn.edu/21757
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Economic Evaluation of Bt Corn Refuge Insurance AgEcon
Mitchell, Paul D.; Hurley, Terrance M.; Hellmich, Richard L..
The EPA has imposed mandatory refuge requirements for Bt crops to prolong the efficacy of Bt. Growers have no economic incentive to plant the required refuge because refuge crops are on average less productive and more risky. This paper evaluates refuge insurance—insurance thatpays indemnities for yield losses on refuge due to insect damage—as a tool to increase grower compliance incentives. We determine actuarially fair insurance premiums, then evaluate the feasibility of private provision of refuge insurance and its impact on grower incentives to comply with refuge requirements. A private market for refuge insurance appears unlikely because our analysis suggests that even a 2 percent load on the actuarially fair premium makes growers unwilling to buy...
Tipo: Working or Discussion Paper Palavras-chave: Bt corn; Crop insurance; Refuge crops; Pest-resistant management; European corn borer; Yield loss; Crop Production/Industries; Risk and Uncertainty.
Ano: 2000 URL: http://purl.umn.edu/18565
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INSURING THE STEWARDSHIP OF BT CORN: 'A CARROT' VERSUS 'A STICK' AgEcon
Mitchell, Paul D.; Hurley, Terrance M.; Babcock, Bruce A.; Hellmich, Richard L..
Subsidies and fines are compared to voluntary and mandatory refuge insurance (insurance for pest damage on Bt corn refuge) as mechanisms for securing grower compliance with EPA refuge mandates. A conceptual model partially ranks mechanisms. Tradeoffs between mechanisms using grower welfare, payments to growers, and monitoring frequency are quantified empirically. Grower welfare is lowest with mandatory insurance because growers pay all costs, and is highest with direct refuge subsidies because public funds or companies subsidize all costs. Assuming typical premium loads and ignoring distribution considerations, we develop monitoring budgets for fines and subsidies, above which voluntary or mandatory insurance is better.
Tipo: Journal Article Palavras-chave: Risk and Uncertainty.
Ano: 2002 URL: http://purl.umn.edu/31127
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Managing European Corn Borer Resistance to Bt Corn with Dynamic Refuges AgEcon
Secchi, Silvia; Hurley, Terrance M.; Hellmich, Richard L..
Genetically engineered Bt (Bacillus thuringiensis) corn provides farmers with a new tool for controlling the European corn borer (ECB). The high efficacy and potential rapid adoption of Bt corn has raised concerns that the ECB will develop resistance to Bt. The Environmental Protection Agency has responded to these concerns by requiring farmers to plant refuge corn. Current refuge requirements are based on models that do not consider the value of dynamically varying refuge in response to increased scarcity and diminished control over time or the importance of backstop technologies currently being developed. The purpose of this paper is to evaluate dynamically optimal refuge requirements with the arrival of alternative backstop technologies and to compare...
Tipo: Working or Discussion Paper Palavras-chave: Bt corn; Optimal control; Pesticide resistance; Crop Production/Industries.
Ano: 2001 URL: http://purl.umn.edu/18626
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MANAGING EUROPEAN CORN BORER RESISTANCE TO BT CORN WITH DYNAMIC REFUGES AgEcon
Secchi, Silvia; Hurley, Terrance M.; Hellmich, Richard L..
We develop a dynamic bioeconomic model of temporally optimal dynamic refuge recommendations for resistance management when a backstop technology arrives at a known date. The impact of the characteristics of the backstop on the use of the current technology, and the difference between static and dynamic refuges are examined.
Tipo: Conference Paper or Presentation Palavras-chave: Crop Production/Industries.
Ano: 2001 URL: http://purl.umn.edu/20543
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Managing the Risk of European Corn Borer Resistance of Transgenic Corn: An Assessment of Refuge Recommendations AgEcon
Hurley, Terrance M.; Secchi, Silvia; Babcock, Bruce A.; Hellmich, Richard L..
Industry and scientists have worked to develop a high-dose refuge management plan that can effectively delay European corn borer (ECB) resistance to new genetically modified pesticidal corn. For a high dose, the corn expresses enough pesticide to kill all but the most resistant corn borers. For refuge, producers plant a traditional corn variety that allows susceptible corn borers to thrive and mate with resistant corn borers, slowing the proliferation of resistance. In general, the more refuge that is planted the less likely resistance. While there is general agreement on the basic premise of the high-dose refuge plan, how much refuge is needed to manage resistance is still being debated. This paper develops a stochastic agricultural production model to...
Tipo: Working or Discussion Paper Palavras-chave: Crop Production/Industries.
Ano: 1999 URL: http://purl.umn.edu/18679
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MANAGING THE RISK OF EUROPEAN CORN BORER RESISTANCE TO TRANSGENIC CORN: AN ASSESSMENT OF CONTROVERSIAL REFUGE RECOMMENDATIONS AgEcon
Hurley, Terrance M.; Secchi, Silvia; Hellmich, Richard L..
A bioeconomic model is developed to evaluate the tradeoff between the risk of resistance and increased productivity when refuge is planted in conjunction with transgenic pesticidal corn. The model is used to evaluate controversial refuge recommendations when producers are allowed to treat refuge in years of high pest pressure.
Tipo: Conference Paper or Presentation Palavras-chave: Productivity Analysis; Research and Development/Tech Change/Emerging Technologies; Risk and Uncertainty.
Ano: 1999 URL: http://purl.umn.edu/21606
Registros recuperados: 10
Primeira ... 1 ... Última
 

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