| Journal: | Acta scientiarum. Agronomy |
| Database: | PERIÓDICA |
| System number: | 000460136 |
| ISSN: | 1679-9275 |
| Authors: | Oliveira Marra, Sharrine Omari Domingues1 Guedes, Raul Narciso Carvalho2 Bastos, Cristina Schetino3 Marra, Pedro Henrique Alves4 Vivan, Lucia Madalena5 Zanine, Anderson de Moura6 |
| Institutions: | 1Universidade Federal do Mato Grosso, Cuiabá. Brasil 2Universidade Federal de Vicosa, Departamento de Entomologia, Viçosa, Minas Gerais. Brasil 3Universidade de Brasília, Departamento de Agronomia, Brasília, Distrito Federal. Brasil 4AgroMarra, Rondonópolis, Mato Grosso. Brasil 5Fundação Mato Grosso, Rondonópolis, Mato Grosso. Brasil 6Universidade Federal do Maranhão, Departamento de Zootecnia, Chapadinha. Brasil |
| Year: | 2019 |
| Volumen: | 41 |
| Country: | Brasil |
| Language: | Inglés |
| Document type: | Artículo |
| Approach: | Analítico, descriptivo |
| English abstract | . The cotton producers from southern Mato Grosso are currently experiencing control failure with the use of the use of insecticides against the cotton boll weevil Anthonomus grandis Boheman, the main pest species of this commodity. Therefore, the present study was designed to survey insecticide resistance and the associated likelihood of control failure among boll weevil populations in the region. Ten insect populations were sampled during the 2016/2017 season and subjected to time-mortality (contact) bioassays in glass vials impregnated with dried insecticide residues at their respective label rates. The three insecticides most frequently used in the region were surveyed: the organophosphate malathion and the pyrethroids beta-cyfluthrin and zeta-cypermethrin. The survival curves showed estimates of the respective median survival time (LT50) for each combination of insecticide and insect copulation. However, there were no significant differences in susceptibility among populations. The estimates of control failure likelihood for each compound at their respective label rates also indicated negligible risk of control failure with their use. These findings are consistent with time-mortality results indicating the lack of insecticide resistant populations at the surveyed sampling sites, suggesting that the reported field control failures result from other causes such as problems with insecticide application |
| Disciplines: | Agrociencias, Biología |
| Keyword: | Fitotecnia, Genética, Análisis estadístico |
| Keyword: | Control, Cotton pest, Resistance management, Survival time, Susceptibility and sustainable pest management |
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