Use este identificador para citar ou linkar para este item: http://repositoriobiologico.com.br//jspui/handle/123456789/438
Título: Mortality of Conotrachelus humeropictus in response to combined application of the nematode Steinernema brazilense and the fungus Beauveria bassiana
Título(s) alternativo(s): Mortalidade de Conotrachelus humeropictus pela aplicação combinada do nematoide Steinernema brazilense com o fungo entomopatogênico Beauveria bassiana
Autor(es): Simi, Lucas Detogni
Leite, Luís Garrigós
Trevisan, Olzeno
Costa, José Nilton Medeiros
Oliveira, Leandro Ezequiel
Schmidt, Fabio Silber
Bueno, Roselaine Nunes da Silva
Batista Filho, Antonio
Data do documento: 23-Ago-2018
Resumo: The fruit borer Conotrachelus humeropictus is one of the most important pests of the cupuaçu crop, and can promote yield losses of around 50%. The present study involved the selection of Beauveria bassiana isolates on Conotrachelus psidii larvae, which was used as test insect due to its taxonomic closeness to C. humeropictus. In order to assess their interaction using combined application, we studied the ability of the nematode to carry conidia of B. bassiana and Metarhizium anisopliae to soil layers. This study also aimed to establish a biological control method for cupuaçu borer with the use of the fungus B. bassiana at 10 kg/ha and the entomopathogenic nematode Steinernema brazilense at 1, 3, 9, and 27 IJ/cm2, applied as single and combined treatments. In the selection of B. bassiana strains for C. psidii, the IBCB 276 and IBCB 165 isolates were the most promising ones, causing 86 and 84% mortality, respectively. The IBCB 276 strain was applied in the field to control C. humeropictus. In the study of carriage of conidia in soil, the nematode S. brazilense was found to be capable of carrying conidia of B. bassiana to deep 7 to 10 cm soil layers. This was not observed with M. anisopliae, found only in the topsoil. In field trials against C. humeropictus larvae, B. bassiana promoted 15.6% mortality. The nematode promoted 60.0% mortality at the highest concentration used, and their combined use with B. bassiana (10 kg/ha) increased mortality to 65.6%, with an additive interaction observed between the two entomopathogens.
Palavras-chave: Biological control
Microbial control
Interaction
Combined use
Citação: Simi, Lucas Detogni; Leite, Luís Garrigós; Trevisan, Olzeno; Costa, José Nilton Medeiros; Oliveira, Leandro Ezequiel; Schmidt, Fabio Silber; Bueno, Roselaine Nunes da Silva; Filho, Antonio Batista. Mortality of Conotrachelus humeropictus in response to combined application of the nematode Steinernema brazilense and the fungus Beauveria bassiana. Arquivos do Instituto Biológico. v. 85, e0092016, 2018.
ISSN: 1808-1657
Número DOI: 10.1590/1808-1657000092016
Idioma: en_US
Editora: Instituto Biológico
Local da Publicação: São Paulo
URI: http://repositoriobiologico.com.br//jspui/handle/123456789/438
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