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2001•Indian Journal of Weed ScienceRequires access

Weed Control Studies in Spring Rice (Oryza sativa L.) under Rainfed Low Valley Situation of Uttaranchal

Vinay Pratap Singh, Govindra Singh

Open publisher page 6 citations

Abstract

A field study carried out during spring seasons (Feb.-Sept.) of 1996–98 revealed that competition with Cyperus rotundus only on an average caused 52.5% reduction in grain yield of rice. Whereas competition with all the weeds growing with the crop caused 86.7% reduction in the grain yield, The highest weed control efficiency was obtained by weed-free condition followed by two hand weedings done at 25 and 45 days after sowing (DAS) and butachlor 1.0 kg/ha+one hand weeding 30 DAS. Butachlor 1.0 kg/ha+one hand weeding 30 DAS gave the highest return per rupee investment (1:1.57) and was at par with two hand weedings done at 25 and 45 DAS and weed-free.

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What this paper is about

A field study carried out during spring seasons (Feb.-Sept.) of 1996–98 revealed that competition with Cyperus rotundus only on an average caused 52.5% reduction in grain yield of rice. Whereas competition with all the weeds growing with the crop caused 86.7% reduction in the grain yield, The highest weed control efficiency was obtained by weed-free condition followed by two hand weedings done at 25 and 45 days after sowing (DAS) and butachlor 1.0 kg/ha+one hand weeding 30 DAS. Butachlor 1.0 kg/ha+one hand weeding 30 DAS gave the highest return per rupee investment (1:1.57) and was at par with two hand weedings done at 25 and 45 DAS and weed-free.

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Available abstract

A field study carried out during spring seasons (Feb.-Sept.) of 1996–98 revealed that competition with Cyperus rotundus only on an average caused 52.5% reduction in grain yield of rice. Whereas competition with all the weeds growing with the crop caused 86.7% reduction in the grain yield, The highest weed control efficiency was obtained by weed-free condition followed by two hand weedings done at 25 and 45 days after sowing (DAS) and butachlor 1.0 kg/ha+one hand weeding 30 DAS. Butachlor 1.0 kg/ha+one hand weeding 30 DAS gave the highest return per rupee investment (1:1.57) and was at par with two hand weedings done at 25 and 45 DAS and weed-free.

Key concepts: Butachlor, Cyperus rotundus, Weed control, Agronomy, Sowing, Forensic science, Non-invasive ventilation, Weed

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Weed Control Studies in Spring Rice (Oryza sativa L.) under Rainfed Low Valley Situation of Uttaranchal — Research Paper | ScholarLens