Annals of Horticulture
Year : 2008, Volume : 1, Issue : 1
First page : ( 41) Last page : ( 44)
Print ISSN : 0974-8784. Online ISSN : 0976-4623.

Bio-efficacy and Phytotoxicity of Insecticidal Dusts Used on Brinjal (Solanum melongena L.) for Control of Insect Pests

Chandra Naveen, Prasad Narbada, Singh S.V.

Department of Entomology, Chandra Shekhar Azad University of Agriculture & Technology, Kanpur-208 002

Abstract

The bio-efficacy of insecticidal dusts including methyl parathion 2D, fenvalerate 0.4D and cyper-methrin 0.25D was evaluated at 0, 20, 24, 28, 36, 48 and 96 kg/ha against jassids and epilachna beetle on brinjal variety Azad B-1 alongwith their phytotoxic effect on the treated crop. The jassid and epilachna were effectively suppressed with two application of these insecticides å 24 kg/ha upto 15 days, but cypermethrin was less efffective thereafter at 21 days of treatment. The insecticides had their significant superiority å 24 kg/ha dosage over lower dosage of 20 kg but could not had remarkable differences from the higher dosages of 28 kg/ha. There was no phytotoxicity of the dusts of fenvalerate 0.4D and cypermethrin 0.25D and methyl parahion 2D at normal dosages of 20, 24 and 28 kg/ha. Methyl parathion produced 9.93 per cent phytotoxic symtoms after 7 days of treatments at 36 kg dosage which had increased with the increase in dosages at 1.5 × 2x × 4x level as well as repeated application of these insecticides.

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Keywords

Bio-efficacy, phytotoxicity, insecticidal dust, brinjal.

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