Integrated Weed Management in Rice in We,stern Uttar Pradesh

Abstract

A field experiment was conducted in rice during kharifseason of2013 on sandy loam soil at Crop Research Centre, Chirauri of Sardar Vallabhbhai Patel University of Agriculture & Technology, Meerut (U.P.).The experiment was conducted in R.B.D with three replications comprising twelve treatments of weed management (weedy check, weed free Pretilachlor, Pretilachlor+ 1 Handweeding, Pyrazosulfuron+Almix, Azimsulfuron, Orthosulfuron, Pyrazosulfuron, Bispyribac-Na, Butachlor, Fenoxaprop ethyl, Almix. The results indicated that herbicide combination methods of weed control significantly reduced the weed population and dry weight effectively over weedy check. The higher grain yield and straw yield, plants hight, maximum number of shoots m-2 , Maximum crop dry matter accumulation and weed control efficiency and nutrient uptake by crop \vere recorded with the application of Pretilachlor+ 1 Handweeding and established its superiority over rest of the herbicides. Similarly, application of Pretilachlor+ I Hand\veeding resulted into higher gross return and net return. The total nitrogen, phosphorous and potassium uptake by rice crop was also highest under this treatment as 120.32, 38.35 and 133.81 kglha, respectively. The values were very close to \veed free treatment.