Biological control of the South American rice water weevil, Oryzophagus oryzae, using light traps with Beauveria bassiana in irrigated rice field

• Autor(a) principal: Tomasoni, Carolina Maria
• Data de Publicação: 2018
• Outros Autores: Heiber, Diego, Hickel, Eduardo Rodrigues
• Tipo de documento: Artigo
• Idioma: por
• Título da fonte: Vértices (Campos dos Goitacazes. Online)
• Texto Completo: https://editoraessentia.iff.edu.br/index.php/vertices/article/view/10015
• topic: Coleoptera; Curculionidae; Integrated pest management; Root maggot; Oryza sativa; Coleoptera; Curculionidae; Manejo integrado de plagas; Bichera de la raíz del arroz; Oryza sativa; Coleoptera; Curculionidae; Manejo integrado de pragas; Bicheira-da-raiz; Oryza sativa

The South American rice water weevil, Oryzophagus oryzae (Costa Lima), is an important pest of irrigated rice in Brazil. Its larvae damage the plant root system. The practice of biological control of this insect needs to be improved. Thus, a research was carried out to verify the mortality rates of O. oryzae, by the infection of individuals with Beauveria bassiana (Bals.) Vuill. in light traps set in irrigated rice field. Two traps received an apparatus of fungal contamination, with mass of B. bassiana, prepared in autoclaved rice. A third trap, without apparatus, was maintained as a control. Insects captured from October 2013 to March 2014 were kept in the laboratory to verify mortality and fungal infection, characterized by the mycelial growth on body. The mortality rate of individuals artificially infected was 73.1%, whereas in the control was 0.8% (natural infection). Light traps with apparatus of fungal contamination were effective on the biological control of O. oryzae adults.