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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 |
Aparece nas coleções: | Artigos |
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Mortality of Conotrachelus humeropictus.pdf | 449.7 kB | Adobe PDF | Visualizar/Abrir |
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