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RESUMEN El presente estudio se realizo durante el periodo julio 2009 a marzo del 2010, en la comarca Chacraseca, del departamento de Leon, El objetivo de este estudio fue identificar y describir la fluctuacion poblacional y el rol de los principales insectos plagas y beneficos asociados al maranon organico y convencional. Para llevar a cabo este estudio se seleccionaron tres fincas organicas y tres fincas convencionales, en cada finca se selecciono una parcela de 1 mz (0.7 ha), en cada parcela se seleccionaron cinco sitios fijos de muestreos, los muestreos se realizaron semanalmente a traves de capturas manuales de insectos plagas e insectos beneficos del follaje. Los insectos colectados en el campo se llevaron al laboratorio de entomologia de la Universidad Nacional Agraria para su respectiva identificacion. Las variables evaluadas fueron: Numero de insectos Homoptera, Heteroptera, Coleoptera, Neuroptera, Diptera, e Hymenoptera por familia. Los resultados fueron los siguientes: se encontro un mayor numero de insectos plagas y beneficos en fincas de maranon organico que en convencional. Se identifico y se describio las fluctuaciones poblacionales de los insectos miembros de las familias: Coreidae, Cicadellidae, Tenebrionidae, Chrysomelidae, Apidae, Formicidae, Dolichopodidae, y Vespidae asociados a este cultivo, se encontro que las familias de insectos Cicadellidae, Tenebrionidae, Chrysomelidae, Coccinellidae y Formicidae se presentaron con mas frecuencia durante la epoca de crecimiento vegetativo del cultivo, los insectos de la familia Dolichopodidae y Vespidae se presentaron con mas frecuencia durante la epoca de floracion del cultivo; y los insectos de la familia Coreidae y Apidae se presentaron con mas frecuencia durante la epoca de fructificacion del cultivo. ABSTRACT This study was conducted during the period from July 2009 to March 2010, in Chacraseca, department of Leon, the aim of this study was to identify and describe the population fluctuations and the role of the principal insect pest and their natural enemies associated to organic and conventional cashew nut plots. To carry out this study, three organic and three conventional farms were selected; in each farm, a plot of 1 mz (0.7 ha) was studied,in each plot, five fixed sampling sites were established, sampling was conducted weekly through insects pests and beneficial insects manual catches on foliage. Field collected insects were brought to the entomology laboratory of the National Agrarian University for their respective identification. The evaluated variables were: Number of insects from the Homoptera, Heteroptera, Coleoptera, Neuroptera, Diptera andHymenopterafamilies. The results were as follow: A higher number of pest and beneficial insects were found in organic than in conventional farms.It was identified and described the population fluctuations of the members of the insect families: Coreidae, Cicadellidae, Tenebrionidae, Chrysomelidae, Apidae, Formicidae, Dolichopodidaeand Vespidae associated to cashew nut. In addition, it was found thatinsect families such as Cicadellidae, Tenebrionidae, Chrysomelidae, Coccinellidae and Formicidae occurred more frequently during the period of vegetative growth of the crop.Besides, insects of the family Dolichopodidaeand Vespidae occurred more frequently during flowering of the crop; and finally, insects of the family Coreidae and Apidae occurred more frequently during fruiting of the crop. PROTECCION DE PLANTAS

Insectos plagas y benéficos asociados al marañón (Anacardium occidentale L.) orgánico y convencional, en León, Nicaragua