Suresh KumarSarita Rani2017-12-042017-12-042017http://krishikosh.egranth.ac.in/handle/1/5810036777The field study was carried out during 2014-15 and 2015-16 at Research Farm of Department of Agronomy, CCS HAU, Hisar. The experiment was conducted in split-plot design keeping three replications with the treatments consisting of five wheat varieties (WH 1105, HD 2967, DPW 621-50, WH 1124 and DBW 17) in main plots and six weed management practices viz, metribuzin (210 g ha-1), metribuzin + fenoxaprop (150 + 100 g ha-1), metribuzin + pinoxaden (150 + 40 g ha-1) metribuzin + clodinafop (150 + 45 g ha-1), weed free and weedy check in sub plots. The wheat varieties did not affect the weed density and weed dry matter accumulation. Variety WH 1105 resulted in maximum growth and yield parameters, except plant height and 1000-grain weight, producing maximum grain, straw and biological yield resulting into maximum net returns and B:C ratio, which was at par with HD 2967 and DPW 621-50, but statistically better than DBW 17 and WH 1124. Among the herbicides, minimum density of grassy and total weeds and dry matter accumulation by them at all stages at and after 60 DAS was observed with metribuzin + fenoxaprop, being at par with other two combinations of metribuzin, whereas, density and dry matter of broad leaf weeds minimum with metribuzin alone (210 g ha-1). Maximum gross returns of wheat crop were found with weed free, however, maximum net returns and B: C ratio of wheat were obtained in metribuzin + fenoxaprop followed by metribuzin + pinoxaden and metribuzin + clodinafop. Any of the herbicide treatment did not exhibit serious phytotoxicity to wheat crop as well as residual toxicity to fodder maize.ennullThesis