Journal ID : AMA-18-08-2021-10631
[This article belongs to Volume - 51, Issue - 03]
Total View : 437

Title : Impact of Weed Management Strategies Evaluated through Various Agronomic Indices in Direct Seeded Basmati Rice Preceded by Wheat in Sequence

Abstract :

A field experiment was conducted consecutively for two years in the Shivalik foot hill plains of Jammu and Kashmir on weed dynamics in direct seeded basmati rice that was preceded by wheat. In this study, the impact of different weed management strategies on crop productivity was assessed. The measures adopted to control weeds resulted in the notable enhancement in crop yields. In wheat, the combined application of Isoproturon @1.0 kg/ha + 2,4-D @ 0.500 L/ha as post emergence (30 DAS) was the most effective weed management approach that gave significant control of weeds which in turn increased crop yields. Weed density (no. of weeds/m2) and weed dry weight (g/m2) were recorded minimum with treatments Isoproturon @ 1.0 kg/ha + 2,4- D @ 0.500 L/ha which was statistically at par with mechanical weeding at 30 and 60 DAS. The same treatment produced significantly superior grain yield in comparison to all treatments under study. In the succeeding crop of direct seeded (DS) basmati rice, sequential application of Pendimethalin @ 1.0 kg/ha (PE) fb Bipyribac @ 0.030 kg/ha as post- emergence (at 30 DAS) turned out to be the most superior treatment that resulted in the highest suppression of weeds consequently maximum crop grain yields were recorded under the same treatment. Efficacy of different weed control interventions in both the crops were also reflected through various Agronomic Efficiency Indices used in the present investigation.

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