Author(s):

Subhashree Priyadarshini, Anjan Kumar Nayak and Thakoor Pavan

Abstract: Bioefficacy of some new insecticides and acaricides against different insect and non-insect pests of chilli were carried out in the present study during 2016 at District Seed Farm (AB Block) of Bidhan Chandra Krishi Viswavidyalaya located at Kalyani, Nadia, West Bengal. Highest reduction of jassid population was noticed from the treatments Imidacloprid 17.8% SL @ 50 a.i. g/ha and The lowest percent reduction was observed in the plots treated with Chlorpyriphos 20% EC @ 200 a.i. g/ha @ 200 a.i. g/ha followed by Fipronil 5% SC @ 50 a.i. g/ha. Maximum reduction of aphid (88.58%) was recorded from Imidacloprid 17.8% SL @ 50 g a.i./ha and Chlorpyriphos 20% EC @ 200 a.i. g/ha and fipronil 5% SC @ 50 a.i. g/ha are comparatively less effective against aphid recorded 66.49% and 67.44% reduction respectively at one day after spraying. Highest reduction of thrips was noticed from the treatments Imidacloprid 17.8% SL @ 50 a.i. g/ha and the lowest percent reduction was observed in the plots treated with Chlorpyriphos 20% EC @ 200 a.i. g/ha followed by Fipronil 5% SC @ 50 a.i. g/ha. In acaricidal management The mean of the first spray revealed that the plots treated with Pataka-a combinition product of Profenophos 40.00%+Cypermethrin4.00% showed lowest no of mites i.e (2.60/three leaves), followed by Fosmite (2.76/three leaves) and in 2^nd spray the results on mean population of mites revealed that the least population was obtained by treating the plots with Pataka-a combination product of Profenofos 40.00% and Cypermethrin 4.00%, followed by Ethion followed by Kaka-a bio acaricide with mite population as (2.68/three leaves),(2.80/three leaves)and (3.31/three leaves) respectively with all the treatments to be significantly at par with control(7.51/three leaves).The observations were recorded 10 days after each spray and mean population was worked out for overall comparison. After ten days of application, lowest numbers of coccinellids mean population (0.88 per plant) was recorded in the plot treated with Profenophos 50% EC @ 750 a.i. g/ha and maximum number of populations was observed in the treatment imidacloprid @ 25 a.i. g/ha (1.54 per plant) as well as untreated plot (1.89 per plant).

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