5,700 research outputs found

    Rede Brasil Arroz: transferência de tecnologia para a orizicultura brasileira.

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    O foco principal do projeto é a equiparação da qualidade dos grãos e a competitividade da orizicultura das diversas regiões produtoras com a do Mercosul. Para alcançar esses objetivos, o projeto atua em todo território nacional, porém de maneira mais efetiva em Goiás, Mato Grosso, Mato Grosso do Sul, Alagoas, Tocantins, Maranhão, Rio Grande do Sul e Santa Catarina, onde estão sendo utilizados os princípios e métodos descritos

    Foliations by spacelike hypersurfaces on Lorentz manifolds

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    In this work we study the geometric properties of spacelike foliations by hypersurfaces on a Lorentz manifold. We find an equation that relates the foliation with the ambient manifold and apply it to investigate conditions for the leaves being totally umbilical or geodesic. Using the Maximum principle with the mentioned equation we obtain an obstruction for the existence of totally geodesic spacelike foliations in a spacetime with positive Ricci curvature on the direction N

    Toxicity of the essential oils from Piper hispidinervum C. DC. and Piper callosum Ruiz Pav. to cupuassu fruit borer Conotrachelus sp. (Coleoptera: Curculionidae).

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    The genus Piper has various plants species with insecticide potential, for example Piper hispidinervum C. DC. and Piper callosum Ruiz & Pav. One way for to comprove the insecticide activity of plants is to test the application of its essential oil and to verify the insect mortality. The target-insect used in experiments was the curculio Conotrachelus sp. This insect is considered a pest in the cupuassu (Theobroma grandiflorum) tillage. Therefore, the aim with this work was evaluated the toxicity of the essential oils from P. hispidinervum and P. callosum to the cupuassu fruit borer Conotrachelus sp

    Evaluation of insecticides for the control of Linepithema Micans (Hymenoptera: Formicidae).

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    Linepithema micans (Forel) (Hymenoptera: Formicidae) is the main ant species responsible for the spreading of Eurhizococcus brasiliensis (Wille) (Hemiptera: Margarodidae), a soil scale that damages grapevine plants in southern Brazil. The effect of contact and ingestion of insecticides on the control of L. micans was evaluated in a greenhouse using grapevines (Vitis spp.) infested by L. micans. The insecticides thiamethoxam (250, 187.5, and 125 g/ha), Þpronil (4, 5, and 50 ml/ha), and imidacloprid (650 g/ha) were sprayed on the ground, whereas toxic baits containing boric acid (0.5, 1.0, and 1.2%), pyriproxyfen (0.3 and 0.5%), and hydramethylnon (0.5%) were evaluated in different formulations. Hydramethylnon (toxic bait) and thiamethoxam (chemical barrier) were the most efÞcient active ingredients for the control of L. micans

    Produção de biomassa aérea de três morfotipos de crajiru [Arrabidaea chica (Bonpl.) B. Verl.] em função da adubação orgânica em Manaus, AM.

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    Este trabalho teve o objetivo de avaliar a produção de biomassa aérea em função de diferentes fontes de adubo orgânico em Manaus, AM.Edição dos Resumos do 52º Congresso Brasileiro de Olericultura, Salvador, jul. 2012

    Anti-candidal activity of 7-hydroxycalamenene isolated from croton cajucara.

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    The leaves and bark from Croton cajucara Benth (family Euphorbiaceae), a shrub from the Amazon, have been used locally used in folk medicine to treat, diabetes, malaria, grastrointestinal and liver disorders.Abstract number 349

    Sacha inchi na nutrição de juvenis de tambaqui e matrinxã.

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    O objetivo desta pesquisa foi avaliar a Sacha inchi Plukenetia volubilis - planta cultivada na Amazônia cujas sementes apresentam características interessantes como um adequado nível proteico (24 a 29 %), vitaminas A e E e ácidos graxos polinsaturados da série ômega 3 - na nutrição de juvenis de tambaqui e matrinxã
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