Title: Weed suppression and production potential of direct-seeded puddled rice (Oryza sativa) as affected by herbicides under varying water management practices
Abstract: A field experiment was conducted for two consecutive kharif seasons of 2003 and 2004 at Kanpur to assess the relative efficacy of herbicides under varying water management practices in direct-seeded puddled rice (Oryza sativa L.). Results revealed that anilofos (0.45 kg/ha) reduced density of Cyperus iria and Echlnochloa colona by 76.2 and 58.7% at 30 days after sowing (DAS), and 61.8 and 57.3% at 90 DAS, respectively, resulting in 50.6% increase in grain yield over untreated. Butachlor (1.5 kg/ha) controlled grasses appreciably but was less effective against broad-leaved weeds and sedges at 30 and 90 days after sowing. Metsulfuron-methyl + chlorimuron-ethyl (4 g/ha) provided excellent control of broad-leaved weeds. Further, Anilofos (0.45 kg/ha) applied at 7 DAS reduced weed dry-matter accumulation significantly which obtained 52 and 55% weed control efficiency during both the stages, resulting in enhanced yield attributes viz., effective panicles/m2 (60.9/m2), panicle length (2.79 cm), grains/panicle (12.86), 1000-grain weight (2.86 g) and finally grain yield (1.12 tonnes/ha) over that of untreated. Spraying of herbicides in presence of standing water proved to be optimum condition for Intended weed control during both the years of study.
Publication Year: 2010
Publication Date: 2010-01-01
Language: en
Type: article
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