Evaluation of Beauveria bassiana for the control of insect pest in stored maize.

The objective of this study was to evaluate the pathogeneicity of some isolates of Beauveria bassiana for the control of insect pests such as Prostephanus truncatus and Stophilus zeamais, in stored maize cobs. Beauveria pathogenecity was also evaluated on Teritriosoma nigrescens, a natural predator...

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Main Authors: Molina, Juan Diego, Espinal, José Raúl
Format: artículo científico
Language: Español
Published: Universidad de Costa Rica 2014
Online Access: http://revistas.ucr.ac.cr/index.php/agromeso/article/view/17301
http://hdl.handle.net/10669/17579
id RepoKERWA17579
recordtype dspace
spelling RepoKERWA175792021-04-14T15:05:17Z Evaluation of Beauveria bassiana for the control of insect pest in stored maize. Evaluación de Beauveria bassiana para el combate de insectos plaga en maíz almacenado. Molina, Juan Diego Espinal, José Raúl The objective of this study was to evaluate the pathogeneicity of some isolates of Beauveria bassiana for the control of insect pests such as Prostephanus truncatus and Stophilus zeamais, in stored maize cobs. Beauveria pathogenecity was also evaluated on Teritriosoma nigrescens, a natural predator of P. truncatus. Conidia of the fungi were mixed with kaolinite and applied to stored maize, 450 cobs arranged in layers of 50. Two trials were established, in the first trial applications of the fungi was done at the moment of storing the maize. In the second trial, applications of the fungi were evaluated after storing the maize. The mortality of P. truncatus was four times higher in the trial where the fungi was applied as a preventive treatment. The mortality of S. zeamais was doubled in the treatment where the fungi was applied at the moment of inoculating with P. truncatus. Mortality levels caused by B. bassiana were higher in P. truncatus than in S. zeamais, but S. zeamais showed an infection 20% larger. El objetivo de este estudio fue evaluar la patogenicidad de aislamientos de Beauveria bassiana, para controlar los insectos plaga Prostephanus truncatus y Stophilus zeamais, en mazorcas de maíz almacenado. Se evaluó también la patogenicidad del hongo sobre Teritriosoma nigrescens, depredador natural de P. truncatus. Se mezclaron conidios secos del hongo con kaolinita y se aplicaron a trojas de maíz de 450 mazorcas acomodadas en capas de 50. Se montaron dos ensayos, en el primero se evaluaron aplicaciones del hongo al momento de almacenar el maíz, y en el segundo se evaluaron aplicaciones del hongo realizadas después de almacenar el maíz. La mortalidad de P. truncatus fue cuatro veces mayor en el ensayo donde se aplicó el hongo en forma preventiva. La mortalidad de S. zeamais fue el doble en el tratamiento donde se aplicó el hongo al momento de inocular con P. truncatus. Los niveles de mortalidad por B. bassiana fueron mayores en P. truncatus que en S. zeamais, pero S. zeamais, pero este último mostró un 20% más de infección que el primero. 2014-12-03 2016-05-02T20:54:16Z 2016-05-02T20:54:16Z artículo científico http://revistas.ucr.ac.cr/index.php/agromeso/article/view/17301 http://hdl.handle.net/10669/17579 spa Copyright (c) 2014 Agronomía Mesoamericana application/pdf Universidad de Costa Rica Mesoamerican Journal of Agronomy; Agronomía Mesoamericana: Vol 11, Nº 2; 15-23 Agronomía Mesoamericana; Agronomía Mesoamericana: Vol 11, Nº 2; 15-23 Agronomía Mesoamericana; Agronomía Mesoamericana: Vol 11, Nº 2; 15-23 2215-3608 1021-7444
institution Universidad de Costa Rica
collection Repositorio KERWA
language Español
description The objective of this study was to evaluate the pathogeneicity of some isolates of Beauveria bassiana for the control of insect pests such as Prostephanus truncatus and Stophilus zeamais, in stored maize cobs. Beauveria pathogenecity was also evaluated on Teritriosoma nigrescens, a natural predator of P. truncatus. Conidia of the fungi were mixed with kaolinite and applied to stored maize, 450 cobs arranged in layers of 50. Two trials were established, in the first trial applications of the fungi was done at the moment of storing the maize. In the second trial, applications of the fungi were evaluated after storing the maize. The mortality of P. truncatus was four times higher in the trial where the fungi was applied as a preventive treatment. The mortality of S. zeamais was doubled in the treatment where the fungi was applied at the moment of inoculating with P. truncatus. Mortality levels caused by B. bassiana were higher in P. truncatus than in S. zeamais, but S. zeamais showed an infection 20% larger.
format artículo científico
author Molina, Juan Diego
Espinal, José Raúl
spellingShingle Molina, Juan Diego
Espinal, José Raúl
Evaluation of Beauveria bassiana for the control of insect pest in stored maize.
author_sort Molina, Juan Diego
title Evaluation of Beauveria bassiana for the control of insect pest in stored maize.
title_short Evaluation of Beauveria bassiana for the control of insect pest in stored maize.
title_full Evaluation of Beauveria bassiana for the control of insect pest in stored maize.
title_fullStr Evaluation of Beauveria bassiana for the control of insect pest in stored maize.
title_full_unstemmed Evaluation of Beauveria bassiana for the control of insect pest in stored maize.
title_sort evaluation of beauveria bassiana for the control of insect pest in stored maize.
publisher Universidad de Costa Rica
publishDate 2014
url http://revistas.ucr.ac.cr/index.php/agromeso/article/view/17301
http://hdl.handle.net/10669/17579
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score 11.949788