Bio-efficacy of new insecticides against sucking pests of chilli
Keywords:
bio-efficacy insecticides, scirtothrips dorsalis, bemisia tabaci, mitesAbstract
The experiment was conducted at Experimental Research Farm, Department of Agricultural Entomology, Vasantrao Naik Marathwada Krishi Vidyapeeth, Parbhani, during the Kharif season of the year 2016-17 to study Bio-efficacy of New Insecticides Against Sucking Pests of Chilli. The experiment was laid out in a randomized block design with 9 treatments replicated three times. The treatments comprised of fipronil 5 SC @ 1000 ml/ha, hexythiaziox 5.45EC @ 500 ml/ha, spinosad 45 SC @ 187.5 ml/ha, acetamiprid 20 SP @ 250 g/ha, fenpyroximate 5 EC @ 600 ml/ha, emamectin benzoate 5 SG @ 250 g/ha, spiromesifen 22.9 SC @ 250 ml/ha, diafenthiuron 50 WP @ 625 g/ha and untreated control. The observations on the effect of these insecticidal treatments on thrips, mites and white fly were recorded. The observations on population dynamics of thrips, mites, white fly and fruit borer also recorded. The insecticides application at 25 & 45 days after transplanting showed that all the treatments were found effective against controlling pest complex of chilli as compared to untreated control. The treatment with spinosad 45 SC @ 187.5 ml/ha was found most effective against thrips, Scirtothrips dorsalis Hood followed by fipronil 5 SC @ 1000 ml/ha. Whereas the treatment with spinosad 45 SC @ 187.5 ml/ha.was effective was followed by emamectin benzoate 5 SG @ 250 g/ha which were found at par with each other and recorded 100 per cent control after second application. The treatment with diafenthiuron 50 WP @ 625 g/ha was recorded superior control of whitefly, Bemisia tabaci Genn. Followed by spinosad 45 SC @ 187.5 ml/ha. The treatment with fenpyroximate 5 EC @ 600 ml/ha, recorded superior control of mites followed by spiromesifen 22.9 SC @ 250 ml/ha and hexythiaziox 5.45 EC @ 500 ml/ha which were found at par with each other.The treatment with spinosad 45 SC @ 187.5 ml/ha recorded highest yield of green chilli fruits followed by emamectin benzoate 5 SG @ 250 g/ha. The overall results indicated that the treatment with spinosad 45 SC @ 187.5 ml/ha was found superior in controlling chilli thrips whereas the treatment with diafenthiuron 50 WP @ 625 g/ha was found superior in controlling chilli whitefly, Fenpyroximate 5 EC @ 600 ml/ha was found superior in controlling chilli mites
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