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	Provedor de dados AgEcon (2) Autor Kipkoech, Anderson Kipruto (2) Mithofer, Dagmar (2) Schulthess, Fritz (2) Yabann, Wilson K. (2) Kipsat, Mary J. (1) Maritim, Henry K. (1) Muchugu, Erick (1) Mais... Palavra-chave Biological control (2) Crop Production/Industries (2) Maize (2) Stemborers (2) Agricultural and Food Policy (1) Benefit-cost (1) Community/Rural/Urban Development (1) Economic valuation (1) Farm Management (1) Food Security and Poverty (1) Impact assessment (1) Parasitoids (1) Mais... Tipo do documento Conference Paper or Presentation (1) Journal Article (1) Ano 2010 (1) 2009 (1) País United States (2) Idioma Inglês (2)		Ordenar por:  Relevância Autor Título Ano Registros recuperados: 2 Primeira ... 1 ... Última The economic value of releasing parasitoid for the control of maize stemborers in East and Southern Africa AgEcon Kipkoech, Anderson Kipruto; Schulthess, Fritz; Yabann, Wilson K.; Maritim, Henry K.; Muchugu, Erick; Mithofer, Dagmar. The braconid larval parasitoid Cotesia flavipes Cameron was introduced from Asia into East and Southern African region starting in 1993 to control the invasive exotic maize stemborer Chilo partellus (Swinhoe) (Lepidoptera: Crambidae). A quasi-experiment was constructed using farmers that applied sublethal dosages of pesticide in assessing the counterfactual for the impact of the establishment of the introduced parasitoid in five countries in the region. Logistic regression method was used to estimate the probability that farmers’ would inadvertently exclude parasitoids in their maize field. Thereafter the propensity score matching method was used to find corresponding farmers excluding parasitoids among those who did not for yield comparison. The... Tipo: Conference Paper or Presentation Palavras-chave: Benefit-cost; Biological control; Impact assessment; Maize; Stemborers; Parasitoids; Agricultural and Food Policy; Community/Rural/Urban Development; Crop Production/Industries; Farm Management; Food Security and Poverty. Ano: 2009 URL: http://purl.umn.edu/51679 Measuring the economic value of redistributing parasitoids for the control of the maize stemborer Busseola fusca Fuller (Lepidoptera: Noctuidae) in Kenya AgEcon Kipkoech, Anderson Kipruto; Schulthess, Fritz; Yabann, Wilson K.; Kipsat, Mary J.; Mithofer, Dagmar. This study assesses the ex ante economic impact of the establishment of two parasitoids, the scelionid egg parasitoid Telenomus isis Polaszek from West Africa and a virulent strain of the braconid larval parasitoid Cotesia sesamiae Cameron from western Kenya, to control stemborer. Using a Cobb-Douglas production function, it was estimated that yields increased by 28.5% when pesticides were used to control stemborers. The benefit-cost ratio after the establishment of the parasitoids ranged from 1:1 to 777:1, with a net present value of up to US$192 million. The study demonstrates the potential of redistributing parasitoids indigenous to Africa for the control of African stemborers. Because the benefits of biological control are positively scale dependent,... Tipo: Journal Article Palavras-chave: Biological control; Economic valuation; Maize; Stemborers; Crop Production/Industries. Ano: 2010 URL: http://purl.umn.edu/93864 Registros recuperados: 2 Primeira ... 1 ... Última

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