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• W2808977207 abstract "Tetranychus ogmophallos Ferreira & Flechtmann (Acari: Tetranychidae) is an emergent pest in peanut ( Arachis hypogaea L. [Fabaceae]) and an important pest of forage peanut ( A. pintoi Krapov. & W.C. Greg. [Fabaceae]) . The susceptibility of T. ogmophallos to Beauveria bassiana (Balsamo) Vuillemin (Cordycipitaceae) and Metarhizium anisopliae (Metschnikof) Sorokin (Clavicipitaceae) was evaluated under laboratory and greenhouse conditions. In the laboratory, adult T. ogmophallos females were treated with B. bassiana and M. anisopliae using a Potter’s tower, and in the greenhouse, bio-insecticides were applied on infested peanut plants. Both fungal suspensions containing 108 conidia per mL caused greater mortality in adult T. ogmophallos females. At 7 d after treatment under laboratory conditions, B. bassiana resulted in 100% mortality and M. anisopliae almost 100% mortality. Bio-insecticides substantially reduced the mite population density under greenhouse conditions when applied to infested peanut plants, with mite populations reduced 84% and 92% by B. bassiana and M. anisopliae , respectively. Under greenhouse conditions, the increase in the number of mites per plant observed at 15 d after treatment suggests the need to repeat the entomopathogen application. Our results demonstrate that B. bassiana and M. anisopliae are promising biological agents to control T. ogmophallos . The practical application of this work for managing T. ogmophallos population on peanut crop is discussed. Resumo Tetranychus ogmophallos Ferreira & Flechtmann (Acari: Tetranychidae) e uma praga emergente na cultura do amendoim ( Arachis hypogaea L. [Fabaceae]) e uma importante praga de amendoim forrageiro ( A. Pintoi Krapov. & W.C. Greg. [Fabaceae]) . A suscetibilidade de T. ogmophallos aos bioinseticidas Beauveria bassiana (Balsamo) Vuillemin (Cordycipitaceae) e Metarhizium anisopliae (Metschnikof) Sorokin (Clavicipitaceae) foi avaliada em laboratorio e em casa de vegetacao. No laboratorio, femeas adultas de T. ogmophallos foram tratadas com B. bassiana e M. anisopliae sob torre de Potter e em casa de vegetacao, os bioinseticidas foram aplicados sobre plantas de amendoim infestadas e avaliacoes foram realizadas durante 15 dias. Suspensoes de ambos os fungos contendo concentracao de 109 conidios para mL causaram alta mortalidade de acaros. No experiment em laboratorio 7 d apos as aplicacoes, B. bassiana causou 100% de mortalidade e M. anisopliae causou mortalidade proximo de 100%. Os fungos reduziram substancialmente a densidade populacional do acaro quando aplicados sobre plantas infestadas, com reducoes que atingiram cerca de 84% para B. bassiana e 92% para M. anisopliae. Em condicoes de casa-de-vegetacao, o aumento no numero de acaros por planta observado aos 15 d apos as aplicacoes reflete a necessidade de realizar uma nova aplicacao dos entomopatogenos. Concluiu-se que B. bassiana e M. anisopliae sao promissores agentes no controle biologico do acaro T. ogmophallos . A aplicacao pratica deste trabalho para o manejo de T. ogmophallos na cultura do amendoim sera discutida. View this article in BioOne" @default.
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• W2808977207 date "2018-06-01" @default.
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• W2808977207 title "Susceptibility ofTetranychus ogmophallos(Acari: Tetranychidae) toBeauveria bassianaandMetarhizium anisopliae" @default.
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• W2808977207 doi "https://doi.org/10.1653/024.101.0215" @default.
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