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	Provedor de dados AgEcon (1) PAB (1) Autor Arruda,Iara Cintra (1) Lauer, Joseph G. (1) Ma, Xingliang (1) Mitchell, Paul D. (1) Scarminio,Ieda Spacino (1) Shi, Guanming (1) Ventura,Maurício Ursi (1) Mais... Palavra-chave Rootworm (2) Agribusiness (1) Bait (1) Bt corn (1) Coleoptera (1) Corn borer (1) Crop Production/Industries (1) D2 (1) D21 (1) Farm Management (1) Herbicide tolerance (1) Herfindahl index (1) Hybrid seed corn (1) Hyperbolic yield model (1) Industrial Organization (1) Insecta (1) Production Economics (1) Q1 (1) Q12 (1) Semiochemical (1) Mais... Tipo do documento Conference Paper or Presentation (1) Info:eu-repo/semantics/article (1) Ano 2009 (1) 2005 (1) País Brazil (1) United States (1) Idioma Inglês (2)		Ordenar por:  Relevância Autor Título Ano Registros recuperados: 2 Primeira ... 1 ... Última Feeding and arrestment responses of Diabrotica speciosa to cucurbitacin-content formulations PAB Arruda,Iara Cintra; Ventura,Maurício Ursi; Scarminio,Ieda Spacino. The objective of this work was to evaluate arrestant and stimulant feeding effects on Diabrotica speciosa (Ger.), using cucurbitacin-content starch-based formulations prepared with varying starch sources, and adding potassium lignate. In a glass slide assay, the wash off resistance of formulations was compared. Potassium lignate did not improve wash off resistance. Lagenaria vulgaris L. powder, in which cucurbitacin B concentration was determined as 0.28%, was added to the most adhesive formulation. The resultant material was used in a two-choice assay in which leaves of common bean, Phaseolus vulgaris L., treated with concentrations of 2.5%, 5%, 10%, 15% and 20% were offered to insects together with untreated control leaves. Greater number of insects and... Tipo: Info:eu-repo/semantics/article Palavras-chave: Insecta; Coleoptera; Bait; Semiochemical; Rootworm. Ano: 2005 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2005000700003 Effect of Prices, Traits and Market Structure on Corn Seeding Density AgEcon Mitchell, Paul D.; Shi, Guanming; Ma, Xingliang; Lauer, Joseph G.. Recent agronomic research finds that economically optimal seeding densities have likely increased for many Midwestern corn farmers as a result of genetic improvements including new GM traits such as Bt corn and herbicide tolerance. We derive a per acre demand model for hybrid seed corn to examine the determinants of corn seeding densities and estimate the model using a large data set of individual farmer seed corn purchases. Current results identify factors other than prices affecting farmer corn seeding densities. Among these factors are the GM trait of the seed corn, measures of the local seed corn market structure, seed purchase source and intended end use. We interpret these effects in terms of information effects—farmers with more/better access to... Tipo: Conference Paper or Presentation Palavras-chave: Hybrid seed corn; Bt corn; Herbicide tolerance; Herfindahl index; Corn borer; Rootworm; Hyperbolic yield model; Agribusiness; Crop Production/Industries; Farm Management; Industrial Organization; Production Economics; D2; D21; Q1; Q12. Ano: 2009 URL: http://purl.umn.edu/49520 Registros recuperados: 2 Primeira ... 1 ... Última

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