STUDIES ON RELATIVE TOXICITY OF CYPERMETHRIN IN COMBINATION WITH CERTAIN INSECTICIDES TO THE LARVAE OF Spodoptera litura Fabricius

V. L. LALITHA KUMARI and C. SUBBA RAO

doi:https://doi.org/10.29321/MAJ.10.A01922

Madras Agricultural Journal

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STUDIES ON RELATIVE TOXICITY OF CYPERMETHRIN IN COMBINATION WITH CERTAIN INSECTICIDES TO THE LARVAE OF Spodoptera litura Fabricius

Author: V. L. LALITHA KUMARI and C. SUBBA RAO,

p-ISSN: 0024-9602, e-ISSN:2582-5321, Vol: 77, Issue: feb-feb,

DOI:https://doi.org/10.29321/MAJ.10.A01922

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Abstract

Laboratory evauation of relative toxicity of cypermethrin alone and in combination with certain Insecticides endosulfan, monocrotophos and carbaryl at five concentrations for each instar studied against the larvae of Spodoptera litura Fabricius in five instars by bio-assay method to determine LC 50 and LC 90 values indicated that cypermethrin alone was the most toxic to the larvae of tobacco caterpillar In all instars followed by cypermethrin + carbaryl, cypermethrin + monocrotophos and cypermethrin + endosulfan.

Keywords: Tobacco caterpillar, Toxicity, Synthetic Pyrethroid, Bioassay

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