S.B. Singh* and R.P. Patel
RVSKVV, College of Horticulture, Mandsaur
Email: sbsmds@ rediffmail.com
Received-06.10.2019, Revised-26.10.2019
Abstrtact: The experiment was conducted in Rabi season of 2015-16 at College of Agriculturefarm, Indore (M.P.) in a Randomized Block Design (RBD) with seven treatments and three replications with variety Aakansha (hybrid), transplanted on 27th November 2015 with 60×45 cm spacing. Three doses of emamectin benzoate 3.7%+difenthiuron 46.3%WP @ 5.60+69.45gai/ha , 7.40+92.60 gai/ha and 9.25+115.75 gai/ha were marked as T1,T2 and T3, respectively.T4- Emamectin benzoate 5%SG @ 10gai/ha , T5- Difenthiuron 50%WP 300 gai/ha and T6- Lambda cyhalothrin 5%EC @ 15 gai/ha were alone insecticidal treatments including T7-Untreated check. Treatments were sprayed thrice at 15 days interval as foliar application with knapsack sprayer @ 500 liter water per hectare. Thrips and whitefly population were counted on five tagged plants from each plot and five leaves per plant i.e. Two leaves from top, two from middle and one leaf from lower portion of plant. Thrips were counted by jerking the twig on a white paper. Observations were recorded at one day before and 7 and 14 days after each spray. Leaf curling was recorded10 days after each spray visually on five plants selected randomly in each. The green chilli yield data (q/plot) was recorded for economic assessment of treatments.The highest reduction in thrips and whiteflypopulation was recorded with highest dose of emamectin benzoate 3.7%+ difenthiuron 46.3% WP @ 250 g.a.i / ha and found at par with the second highest dose of emamectin benzoate 3.7%+ difenthiuron 46.3% WP @ 200 g.a.i / ha in all the sprays.After first spraying minimum leaf curling was noted in highest dose of emamectin benzoate 3.7%+ diafenthiuron 46.3% WP @ 250 g.a.i./ha (21.69%) and found at par with second highest dose of emamectin benzoate 3.7%+ diafenthiuron 46.3% WP @ 200 g.a.i./ha (24.14%). Similar trend was recorded as 16.20% and 18.79% in second spraying and 9.61% and 11.86% in third spraying, respectively.The highest green chilli yieldwas obtained again with highest dose of emamectin benzoate 3.7%+ difenthiuron 46.3% WP @ 250 g.a.i./ha (171.11 q/ha and 44.40) and found at par with rest of its two doses as166.29 q/ha and 147.03 q/ha, respectively. Cost benefit ratio was calculated in same trend as 4.40, 4.30 and 3.82, respectively.
Keywords: Thrips, Whitefly, emamectin benzoate, difenthiuron, management
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