Vol. 10, Issue 12 (2021)

Author(s):
NK Meena, AK Verma, Ravi Y, Nanda Ram and BM Meena

Abstract:
Field trials were conducted at two locations, the Research Farm of ICAR-National Research Centre on Seed Spices, Ajmer and Budhwara, Pisangan (Ajmer) for two consecutive seasons, rabi 2016-17 and 2017-18, to evaluate the efficacy of different dosages of imidacloprid 600 FS (Gaucho) as seed treatments against aphids mixed population in cumin. A total of five treatments comprised of imidacloprid 600FS @ 3g a.i./kg seed, 3.6g a.i./kg seed and 4.2g a.i./kg seed, thiamethoxam 30FS @ 2.1g a.i./kg seed and untreated control. The trials result showed that all the treatments were found significantly superior over untreated control in management of aphid in cumin. Imidacloprid 600FS @ 4.2g a.i./kg seed, received zero aphid infestation up to 40 days after seed germination during both the years and locations and also exhibited statistically at par to imidacloprid 600 FS @ 3.6g a.i./kg seed with negligible population 0.04 aphids/plant at 40 days after seed germination in rabi 2016-17 in both the locations. Similarly, imidacloprid 600FS @ 4.2g a.i./kg seed had obtained the highest seed yield of cumin i.e. 1180, 1050 and 1305 and 1148 kg/ha at institute’s research farm and Budhwara in 2016-17 and 2017-18, respectively but statistically at par with imidacloprid 600 FS@ 3.6 g a.i./kg seed. Imidacloprid 600FS @ 4.2g a.i./kg seed did not recorded phytotoxic symptoms till 35 days after sowing.