Effect of Herbicides Combination on Weed Management and Yield of Direct Wet Seeded Rice (Oryza sativa L.)

Abstract

Rice is the most stable food crop in the world, especially in Southeast Asia. Different types of methods are used in rice cultivation viz., conventional method and the no-till (direct seeding) method. Now a days, the direct seeding method of rice cultivation is gaining popularity among farmers due to its lower labour and energy requirements. In direct seeding rice weeds are the major hindrance, which compete with crops for important factors such as light, space, nutrient and moisture. To manage the weeds population in direct-seeded rice, a study was conducted in the summer, 2022 to find out the best herbicide combination. The design adopted for this experiment was Randomized Block Design (RBD) with 12 treatments and 3 replications. The results of the study revealed that a weed free plot (T11) followed by the application of Pretilachlor 50% EC @ 625 g a.i. ha-1 on 3 DAS (Days After Sowing)+ Bispyribac-sodium 10% SC @ 20 g a.i. ha-1 + Ethoxysulfuron 15% WDG (Water Dispersible Granule) @ 15 g a.i. ha-1 (Tank Mix) on 15 DAS and 40 DAS (T9) recorded higher weed control efficiency, lesser weed density and weed dry weight compared to all other treatments. A similar result was observed in yield attributes like number of tillers m-2, number of productive tillers m2, panicle length, number of grains panicle-1, test weight, higher grain and straw yield of direct wet seeded rice.