Author(s): S. SEN, L. C. PATEL AND H. RAHAMAN

Abstract: The present study was conducted to evaluate bio-efficacy of four different concentrations of Teflubenzuron 75 g l^{- 1}+Alphacypermethrin 75 g l^-1150 SC (200, 300, 400 and 500 ml ha^-1) during rabi, 2019-2020 and kharif, 2020 against fall armyworm (FAW) on maize. The premix formulation of this chemical @ 500 ml ha^-1 gave highest larval population reduction (84.69-81.13 %), lowest leaf damage scoring (1.06-0.83 at 10 days after 2^nd spray), highest green cob yield (147.67-133.00 q ha- 1) and satisfactory adult coccinellids (1.67-2.00/5 plants at 10 DAS) for both season of trials. The other two next lower doses i.e., @ 400 and 300ml ha^-1 of the said chemical were also good and they were followed by Thiamethoxam + Lambda cyhalothrin 9.5 % ZC @ 125 ml ha^-1. Considering best result from the present experiment, the premix formulation of Teflubenzuron 75 g l^-1 + Alphacypermethrin 75 g l^-1150 SC @ 500 ml ha^-1 may be recommended to use by the farmers to combat S. frugiperda in maize.

DOI: 10.22271/09746315.2023.v19.i2.1717

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