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Journal of Entomological Research
Year : 2024, Volume : 48, Issue : 1
First page : ( 13) Last page : ( 17)
Print ISSN : 0378-9519. Online ISSN : 0974-4576.
Article DOI : 10.5958/0974-4576.2024.00003.3

Persistent toxicity of insecticides, fungicides, and their combinations against Spodoptera litura (Fab.) on soybean

Kandpal Gunjan*, Srivastava R.P.

Insecticide Toxicology Laboratory Department of Entomology, College of Agriculture, Govind Ballabh Pant University of Agriculture and Technology, Pantnagar - 263 145, Uttarakhand, India

*Corresponding authors' E-mail : gunjankandpal115@gmail.com

Online published on 4 March, 2024.

Abstract

The persistent toxicity (PT) of three insecticides, three fungicides and their nine combinations has been determined on soybean, Glycine max (L.) Merr. against 3d old larvae of Spodoptera litura (Fab.). The order of persistent toxicity at 72 h after feeding (HAF) was emamectin benzoate > [fluxapyroxad + pyraclostrobin] + [emamectin benzoate] > novaluron + indoxacarb > [fluxapyroxad + pyraclostrobin] + [novaluron + indoxacarb] > [metiram + pyraclostrobin] + [ novaluron + indoxacarb] > [metiram + pyraclostrobin + emamectin benzoate] > indoxacarb > [fluxapyroxad + pyraclostrobin + indoxacarb] > [metiram + pyraclostrobin] + [indoxacarb] > [fluxapyroxad + pyraclostrobin] > [metiram + pyraclostrobin] > [carbendazim + mancozeb] > [indoxacarb + carbendazim + mancozeb]. The most persistent treatment was emamectin benzoate with a PT value 1050 followed by emamectin benzoate + [fluxapyroxad + pyraclostrobin] (1050), novaluron + indoxacarb (1016) and novaluron + indoxacarb + [fluxapyroxad + pyraclostrobin] (916.65) at 72 HAF. The least persistent combinations were carbendazim + mancozeb (6.66) followed by indoxacarb + [carbendazim + mancozeb] (6.66) and [metiram + pyraclostrobin] (26.66).

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Keywords

Glycine max (L.) Merr. var PS- 1347, Insecticide and fungicide combinations, Persistent toxicity, Spodoptera litura.

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