Rice resistance buffers against the induced enhancement of brown planthopper fitness by some insecticides

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dc.creatorHorgan, Finbarr G.
dc.creatorPeñalver-Cruz, Ainara
dc.creatorAlmazan, Maria Liberty P.
dc.date2021-12-03
dc.date2024-12-19T12:53:31Z
dc.date2024-12-19T12:53:31Z
dc.date.accessioned2026-06-27T04:10:43Z
dc.descriptionThe brown planthopper, Nilaparvata lugens (Stål)[BPH], is a damaging pest of rice in Asia. Insecticides and rice varietal resistance are widely implemented BPH management practices. However, outbreaks of BPH have been linked to excessive insecticide use—challenging the compatibility of these two management practices. IR62 is a variety with resistance against BPH, the whitebacked planthopper, Sogatella furcifera Horváth [WBPH], and the green leafhopper, Nephotettix virescens (Distant)[GLH]. We compared BPH responses to IR62 and to the susceptible variety IR64 treated with buprofezin, carbofuran, cartap hydrochloride, cypermethrin, deltamethrin, fipronil, or thiamethoxam + chlorantraniliprole. In greenhouse bioassays, cypermethrin, fipronil and thiamethoxam + chlorantraniliprole reduced egg laying on both varieties, and, together with buprofezin, reduced nymph survival to zero. Buprofezin, carbofuran, and cartap hydrochloride stimulated egg laying, and carbofuran increased nymph biomass, but these effects were reduced on IR62. Planthopper populations were ten times higher on deltamethrin-treated rice than untreated rice in a screenhouse experiment. Host resistance failed to buffer against this insecticide-induced resurgence in BPH and WBPH. However, IR62 reduced the effect in GLH. Rice treated with cypermethrin and fipronil had reduced yields compared to untreated controls, suggesting possible phytotoxic effects. We found little evidence of synergies between the two management practices; but host resistance did buffer against the undesirable effects of some insecticides.
dc.identifierhttps://hdl.handle.net/10568/164150
dc.identifier.urihttp://hdl.handle.net/123456789/24098
dc.languageen
dc.publisherMDPI
dc.rightsOpen Access
dc.sourceHorgan, F.G., Peñalver-Cruz, A. and Almazan, M.L.P. 2021. Rice resistance buffers against the induced enhancement of brown planthopper fitness by some insecticides. Crops, Volume 1 no. 3 p. 166-184
dc.subjectnilaparvata lugens
dc.subjectir varieties
dc.subjectplanthoppers
dc.subjectsogatella furcifera
dc.subjectvarieties
dc.subjectpests
dc.subjectpest control
dc.titleRice resistance buffers against the induced enhancement of brown planthopper fitness by some insecticides
dc.typeJournal Article

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Instituto Internacional de Investigación del Arroz (IRRI)