Title:	Insecticide resistance and control failure likelihood among populations of the boll weevil (Anthonomus grandis) from Mato Grosso (Brazil)
Authors:	Oliveira-Marra, Sharrine Omari Domingues Guedes, Raul Narciso Carvalho Bastos, Cristina Schetino Marra, Pedro Henrique Alves Vivan, Lucia Madalena Zanine, Anderson de Moura
metadata.dc.identifier.orcid:	http://orcid.org/0000-0001-6783-7874
Assunto::	Pragas agrícolas - controle Algodão - doenças e pragas Resistência à doenças e pragas Inseticidas Bicudo-do-algodoeiro
Issue Date:	2019
Publisher:	Editora da Universidade Estadual de Maringá - EDUEM
Citation:	OLIVEIRA-MARRA, Sharrine Omari Domingues et al. Insecticide resistance and control failure likelihood among populations of the boll weevil (Anthonomus grandis) from Mato Grosso (Brazil). Acta Scientiarum, Agronomy, v. 41, e42714, 2019. DOI: https://doi.org/10.4025/actasciagron.v41i1.42714. Disponível em: http://scielo.br/scielo.php?script=sci_arttext&pid=S1807-86212019000105023. Acesso em: 23 jan. 2020.
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.
metadata.dc.description.unidade:	Faculdade de Agronomia e Medicina Veterinária (FAV)
Licença::	(CC BY)
DOI:	https://doi.org/10.4025/actasciagron.v41i1.42714
Appears in Collections:	Artigos publicados em periódicos e afins

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