BIOEFFICACY OF NEWER INSECTICIDES AGAINST LEPIDOPTERAN PESTS AND THEIR RESIDUE DYNAMICS ON CABBAGE

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dc.contributor.advisorSharma, Prem Chand
dc.contributor.authorChowdary, Namburi Mounica
dc.date.accessioned2020-01-24T05:55:45Z
dc.date.available2020-01-24T05:55:45Z
dc.date.issued2019-06-18
dc.description.abstractField experiment was conducted at Experimental Research Farm of Department of Entomology, CSKHPKV, Palampur during the rabi season 2018-19 to determine the bioefficacy of insecticides against Plutella xylostella and their residue dynamics on cabbage, variety Pusa Cabbage-1. The bioefficacy of insecticides comprising chlorantraniliprole, cypermethrin, diafenthiuron, emamectin benzoate, indoxacarb, novaluron, azadirachtin, spinosad and Bacillus thuringiensis was determined. After two sprays, chlorantraniliprole @ 10g a.i./ha recorded minimum larval population with 1.21 larvae/plant followed by spinosad @ 15 g a.i./ha (1.43) and indoxacarb @ 40 g a.i./ha (1.6). The treatments with high larval population were azadirachtin (5.56 larvae/plant) followed by Bt (5.47). The per cent reduction of larval population over untreated check was highest in chlorantraniliprole (81.02%), followed by spinosad (78.13%) and indoxacarb (78.02%). The lowest per cent reduction was found in the plots treated with Bt (45.14%) and azadirachtin (45.52%). Incremental cost benefit ratio was maximum (1:18.44) in chlorantraniliprole followed by spinosad (1:16.33) and diafenthiuron (1:13.96). The lowest incremental cost benefit ratio was found with novaluron (1:2.48). The initial deposits of diafenthiuron, indoxacarb and novaluron on cabbage heads were found to be 0.604, 0.309 and 0.218 mg/kg, respectively which were below the quantification limits on 7th day after spray. The half-life values were calculated to be 1.05, 1.73 and 1.14 days, the safety intervals were found to be 0.77, 0.13 and 1.91 days, for diafenthiuron, indoxacarb and novaluron, respectively.en_US
dc.identifier.urihttp://krishikosh.egranth.ac.in/handle/1/5810141774
dc.keywordsLepidopteran, Cabbage.en_US
dc.language.isoenen_US
dc.pages79en_US
dc.publisherCSK HPKV, Palampuren_US
dc.subEntomologyen_US
dc.subjectnullen_US
dc.themeTo evaluate the bioefficacy of newer insecticides against lepidopteran pests on cabbage.en_US
dc.these.typeM.Scen_US
dc.titleBIOEFFICACY OF NEWER INSECTICIDES AGAINST LEPIDOPTERAN PESTS AND THEIR RESIDUE DYNAMICS ON CABBAGEen_US
dc.typeThesisen_US
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