5,331 research outputs found

    Compatibilidade necessária.

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    Compatilizar o emprego dos controles químico e biológico contra pragas em tomateiro é um desafio que se reveste de grande importânica por auxiliar a garantir a sustentabilidade da cultura e favorecer o manejo integrado de insetos. É o caso de uso do parasitoide Trichogramma pretiosum, com ação no combate a Tuta absoluta, brocas pequena e grande, diferentes espécies de Spodoptera e Helicoverpa armigera, o que demanda a utilização de inseticidas seletivos.bitstream/item/108822/1/Compatibilidade-necessaria.pd

    Impacto de agrotoxicos utilizados na cultura do tomateiro a adultos de Trichogramma pretiosum Riley (Hym.: Trichogrammatidae)

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    O presente trabalho objetivou avaliar o impacto de (g. i. a. L de água)Bacillus thuringiensis (0.05), Chlorantraniliprole (0.04), Etifenoprox (0.13), Fenpropathrin (0.45), Triflumuron (0.144), Azoxystrobin (0.15), Diphenconazole (0.125), tebuconazole (0.2), fluazitop-p-butil (2.5) e metribuzin (2.4) recomendados para o controle de pragas (insetos, doenças e plantas daninhas na cultura do tomateiro.Resumo

    Output functions and fractal dimensions in dynamical systems

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    We present a novel method for the calculation of the fractal dimension of boundaries in dynamical systems, which is in many cases many orders of magnitude more efficient than the uncertainty method. We call it the Output Function Evaluation (OFE) method. The OFE method is based on an efficient scheme for computing output functions, such as the escape time, on a one-dimensional portion of the phase space. We show analytically that the OFE method is much more efficient than the uncertainty method for boundaries with D<0.5D<0.5, where DD is the dimension of the intersection of the boundary with a one-dimensional manifold. We apply the OFE method to a scattering system, and compare it to the uncertainty method. We use the OFE method to study the behavior of the fractal dimension as the system's dynamics undergoes a topological transition.Comment: Uses REVTEX; to be published in Phys. Rev. Let
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