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Studies on efficiency of different botanical herbicides on weed management of rice (cv. Gobindobhog)

Abstract: The aromatic rice variety Gobindobhog was used in the experiment which was carried out in RBD design with 8 treatments and 3 replications. The treatments were: T₁ = Control plot, T₂ =Two hand weeding @ 20 and 40 DAT; T₃ =Mechanical weeding @ 20 and 40 DAT; T₄ =Cyperus rotundus extract + 1 mechanical weeding at 30 DAT; T₅=Echinochloa colona extract +1 mechanical weeding at 30 DAT ; T₆ =Bambusa vulgaris leaf & shoot extract + 1 mechanical weeding at 30 DAT; T₇=Cucumis sativus leaf extract + 1 mechanical weeding at 30 DAT, and T₈=Xanthium strumanium leaf extract + 1 mechanical weeding at 30 DAT. The result revealed that the application of botanical herbicides had a significant influence on weed control efficiency, weed control index, growth and yield of crop which was found highest under the treatment T₇ followed by T₆. T₇ treatment had maximum number of effective tiller that produced highest yield (3717 kg/ha). Thus, it may be concluded that application of Cucumber leaf extract along with one mechanical weeding at 30 DAT gives highest weed control efficiency.

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