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Agricultura Técnica
Instituto de Investigaciones Agropecuarias, INIA
ISSN: 0365-2807
EISSN: 0365-2807
Vol. 62, No. 4, 2002, pp. 489-496
Bioline Code: at02046
Full paper language: Spanish
Document type: Research Article
Document available free of charge

Agricultura Técnica, Vol. 62, No. 4, 2002, pp. 489-496

 es Patogenicidad de Aislamientos Chilenos de Beauveria Bassianaen Adultos de Asynonychus Cervinus(Boh.) (Coleoptera: Curculionidae)
France, Andrés; Gerding, Marcos & Sandoval, Alicia

Resumen

Se evaluó el efecto de cuatro aislamientos nativos de Beauveria bassiana sobre el consumo de alimento y la mortalidad a través del tiempo de adultos de Asynonychus cervinus, mediante inmersión a distintas concentraciones de inóculo (0-108 conidias mL-1). Los resultados indicaron que los insectos tratados con B. bassiana redujeron el consumo de alimento en forma lineal, disminuyendo en 70% su consumo a los 35 días. En cuanto a la mortalidad, los cuatro aislamientos no presentaron diferencias entre ellos, todos fueron letales para A. cervinus y la letalidad aumentó junto a las concentraciones de inóculo. A partir de las curvas de mortalidad se calcularon las concentraciones letales CL50 y CL590, donde la mejor aislación (Qu-B299) obtuvo valores de 1x104,7 y 1x108,3 conidias mL-1, respectivamente.

Palabras-clave
control biológico, curculiónidos, entomopatógenos, hongos

 
 en Pathogenicity of Chilean Isolates of Beauveria Bassianato Adults of Asynonychus Cervinus(Coleoptera: Curculionidae)
France, Andrés; Gerding, Marcos & Sandoval, Alicia

Abstract

Four native isolates of Beauveria bassiana were evaluated for food consumption and mortality over time against adults of Asynonychus cervinus (Boh.) through inoculation at different concentrations (0-108 conidia mL-1). The results indicated that food intake of insects treated with B. bassiana decreased linearly, reducing 70% consumption after 35 days. As to mortality, no differences were observed among the four isolates, all were lethal for A. cervinus and the deadliness increased with the concentrations of the isolate. From the mortality curves, the lethal concentrations LC50 and LC90 were calculated, and the best isolate (Qu-B299) had values of 1x104.7 and 1x108.3 conidia mL-1, respectively.

Keywords
biological control, curculionids, entomopathogens, fungi

 
© Copyright 2002 - Instituto de Investigaciones Agropecuarias, INIA (Chile)
Alternative site location: http://www.inia.cl/at/agritec.htm

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