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Fipronil resistance in pink stem borer, Sesamia inferens (Walker) (Lepidoptera: Noctuidae) from Pakistan: Cross-resistance, genetics and realized heritability

Pink stem borer Sesamia inferens (Walker) (Lepidoptera: Noctuidae) is a major pest of sugarcane and rice frequently controlled by the use of insecticides, including fipronil. This study focused on fipronil resistance characterization in S. inferens by selecting a population (called Fipro-SEL Pop) wi...

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Bibliographic Details
Published in:Crop protection 2019-06, Vol.120, p.103-108
Main Authors: Mansoor, Muhammad Mudassir, Raza, Abu Bakar Muhammad, Afzal, Muhammad Babar Shahzad
Format: Article
Language:English
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Summary:Pink stem borer Sesamia inferens (Walker) (Lepidoptera: Noctuidae) is a major pest of sugarcane and rice frequently controlled by the use of insecticides, including fipronil. This study focused on fipronil resistance characterization in S. inferens by selecting a population (called Fipro-SEL Pop) with fipronil for 14 generations. Fipro-SEL Pop population showed 106.00- and 22.71-fold resistance to fipronil when compared to unselected (UNSEL) and Field strains, respectively. Fipro-SEL strain showed no cross-resistance to chlorpyrifos, lambda-cyhalothrin and spinosad. Reciprocal crosses between Fipro-SEL and UNSEL strains revealed an autosomal and incompletely recessive nature of resistance to fipronil. The F1 and F1' showed similar LC50 values against fipronil and their dominance values were 0.46 and 0.53, respectively. Chi-square goodness of fit test suggested that fipronil resistance was polygenic. Realized heritability value was 0.25 for fipronil resistance. These outcomes would be useful for effective management of S. inferens. •Sesamia inferens showed 106- and 22.71-fold resistance to fipronil when compared to UNSEL and Field strains.•Fipro-SEL strain showed no cross-resistance to other tested insecticides.•Resistance to fipronil in Sesamia inferens was autosomal, incompletely recessive and polygenic.•Realized heritability (h2) value was 0.25.
ISSN:0261-2194
DOI:10.1016/j.cropro.2019.02.028