Efficacy of new generation herbicides in combination and integrated application on weed control efficiency, production potential and economics in direct seeded rice (Oryza sativa L.)

Abstract

Results of the experiment revealed that application of pendimethalin + pyrazosulfuron ethyl @ 920 g ha-1 as pre emergence at 1 to 2 DAS with manual weeding at 20 DAS fb halosulfuron @ 35 g ha-1 as post emergence at 35 DAS was found to be effective in controlling weeds and enhancing the weed control efficiency. The growth, yield attributing characters like productive panicle m-2, grains panicle-1 and 1000 grain weight and grain yield of direct seeded rice was remarkably enhanced in pendimethalin + pyrazosulfuron ethyl @ 920 g ha-1 as pre emergence at 1 to 2 DAS with manual weeding at 20 DAS fb halosulfuron @ 35 g ha-1 as post emergence at 35 DAS without any crop injury. The same treatments were found economically viable. Unweeded control resulted in reduction of grain yield to 61.2 %.