Inoculation methods and virulence of Beauveria bassiana (Bals.) Vuill. to Cosmopolites sordidus (Germar) (Coleoptera:Curculionidae) in laboratory
DOI:
https://doi.org/10.5433/1679-0359.2010v31n1p67Keywords:
Biological control, Entomopathogenic fungi, BioassayAbstract
The research aimed to assess different inoculation methods of Beauveria bassiana (Bals.) Vuill. on Cosmopolites sordidus (Germar) adults, in laboratory conditions on an isolates selection bioassay. Conidial suspensions of UEL151 strain were applied on insects through the following methods: spray, immersion, dorsal and ventral topical. Low mortalities were achieved for all inoculation methods, with a higher value for immersion (21.7%) at 37 days after application (DAA), as the rest of methods were significantly lower. The evaluation must be extended to a maximum of 22 DAA because the sporulation rate (confirmed mortality / total mortality) decreased with time in all methods, with values of 95.8 and 75.3%, at 22 and 37 DAA, respectively, on the immersion method. Dorsal and ventral topical methods caused not significant C. sordidus virulence, so new tests are necessary with different fungus concentrations.
Downloads
Published
How to Cite
Issue
Section
License
Semina: Ciências Agrárias adopts the CC-BY-NC license for its publications, the copyright being held by the author, in cases of republication we recommend that authors indicate first publication in this journal.
This license allows you to copy and redistribute the material in any medium or format, remix, transform and develop the material, as long as it is not for commercial purposes. And due credit must be given to the creator.
The opinions expressed by the authors of the articles are their sole responsibility.
The magazine reserves the right to make normative, orthographic and grammatical changes to the originals in order to maintain the cultured standard of the language and the credibility of the vehicle. However, it will respect the writing style of the authors. Changes, corrections or suggestions of a conceptual nature will be sent to the authors when necessary.