Herbicidal Activity of Penoxsulam And Bispyribac-Sodium and its Combination With Mineral Oil And Spreading Material on Weed Rice Plant

Abstract

Two field experiments were carried out at the Experimental Farm of Rice Research and Training Center(RRTC), Sakha, Kafr El-sheikh, Egypt, during 2009 and 2010 rice growing seasons. to study the effect of certain postemergenceherbicides (Penoxsulam and Bispyribac-sodium and their mixtures with mineral oil KZ and spreadingmaterial (Top film) on weeds control rice plant compared with non-chemical control Weedy check, The results Theresult showed that the number of tiller to Echinochloa crus-galli , Echinochloa colonum , Cyperus difformis. In alltested treatment from the results the most lesser above of weeds and highest percent reduction of weeds was found inpenoxsulam and bispyribac-sodium at the recommended rate of each herbicides wean the half rate both compounds wascompared one litter of spreading material or one litter of mineral oil was slightly increased of weeds with the higherincrease of percent reduction in total weeds compared with the effect of the half rate only of each tested compound.penoxsulam 2.5% half rate + 1000ml spreading material which gives 82%, 87%,83% and 84%,92%,88% during2009and 2010 season respectively. bispyribac-sodium 2% half rate + 1000ml spreading material which gives89%,89%,89% and 88%, 94%, 87% reduction in the total number, Also gave the most highest percent reduction in totaldry weight of weeds. When the mineral oil and spreading material were used with half recommended rate of the twoabove herbicides the percent reduction of dry weight of weed were approximately equal to the recommended rate ofeach tested herbicides such effect relieved to the efficacy of mineral oil and spreading material to improve the power ofhalf rate to reach the effect of recommended rate.