Efficacy of bispyribac-sodium on weed flora and yield of drilled rice
2012; Indian Society of Weed science; Volume: 44; Issue: 3 Linguagem: Inglês
ISSN
0974-8164
AutoresAnay Rawat, CS Chaudhary, V.B. Upadhyaya, Vikas Jain,
Tópico(s)Agricultural Science and Fertilization
ResumoRice (Oryza sativa L.) being a major food crop of Madhya Pradesh is cultivated on 1.68 million ha with production of 1.56 million tones (Anonymous 2009). Direct seeding of rice has more benefits as compared to traditional transplanting. However, weeds are one of the limiting factors in directseeded rice, which reduce the yield up to 50-100%. Bispyribac-sodium is known to be effective against many annual and perennial grasses, sedges, and broad-leaved weeds in rice (Yadav et al. 2009). However, meager information is available for Kymore plateau and Satpura Hills Zone of M.P., hence the present investigation was undertaken. METHODOLOGY A field experiment was carried out during Kharif season of 2010 at Jawaharlal Nehru Kirshi Vishwa Vidyalaya, Jabalpur (M.P.) to test the efficacy of bispyribac-sodium against weeds. Ten treatments consisting of bispyribac-Na at varying doses along with conventinonal herbicides (butachlor) and hand weeding were arranged in a randomised block design with three replications. Rice variety ‘IR 64’ was direct-seeded these treatments, which was significantly lower than all other treatments. These results are in conformity with the findings of Yadav et al. (2009). Maximum weed index (66.4%) was recorded in unweeded check. Among the herbicidal treatments, bispyribac-sodium 80 g/ha recorded minimum weed index (5.2%). This clearly indicated that weeds were controlled effectively under bispyribac-sodium 80 g/ha.
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