Monitoring of beet armyworm resistance to spinosad and methoxyfenozide in Mexico

Pest Management Science
Aniceto OsorioSamuel Pineda

Abstract

Resistance to spinosad and methoxyfenozide has been studied in several insect pests, but there is a lack of information on Spodoptera exigua (Hübner) in Mexico. Therefore, evidence for the development of resistance in this pest to both compounds was examined. The effects of methoxyfenozide on reproductive parameters of S. exigua adults were also determined. Third instars from a field population were exposed for 24 h to the LC(50) of spinosad or methoxyfenozide for over six generations (G(2)-G(7)). No significant reduction in susceptibility to either compound was detected for up to five generations. In G(7), LC(50) values for insects exposed to spinosad and methoxyfenozide were respectively 2.75-fold and 1.25-fold greater than for G(1) larvae. Oral treatment with methoxyfenozide reduced the fecundity and fertility of G(7) adults, confirming sublethal effects on reproduction. Finally, five populations (Se-La Floriza, Se-Lazareto, Se-Bachigualato, Se-Los Agustinos and Se-Villa de Arista) of S. exigua were collected from fields in three states of Mexico for resistance monitoring to spinosad and methoxyfenozide. With the exception of Se-Villa de Arista, the other populations showed significant resistance to spinosad, with resistance...Continue Reading

References

Jun 18, 2005·Pest Management Science·Francisco-Javier Sáenz-de-Cabezón IrigarayIgnacio Pérez-Moreno

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Citations

May 26, 2012·TheScientificWorldJournal·Ju-Chun HsuRonald F L Mau
Apr 25, 2014·Pesticide Biochemistry and Physiology·Adeel Rehan, Shoaib Freed
Jul 24, 2014·Pesticide Biochemistry and Physiology·Xiangrui TianJianya Su
Jun 24, 2010·Journal of Economic Entomology·Christian-Luis Rodríguez EnríquezAna-Mabel Martínez
Apr 16, 2009·Pest Management Science·Hadi Mosallanejad, Guy Smagghe
May 22, 2020·Frontiers in Microbiology·María Martínez-SolísSalvador Herrero
Feb 3, 2021·Journal of Microbiology and Biotechnology·Miltan Chandra RoyYonggyun Kim

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