Effect of Glyphosate and Haloxyfop-R-Methyl and Flaming on Vetiver Chrysopogon zizanioides (L). Roberty(Control

The effect of chemical and flaming methods on control of Vetiver grass was investigated at laboratory greenhouse of Khorasan Razavi Agricultural Research Center during 2010 and 2011. Two experiments were laid out in randomized complete block designs with four replications. Chemical control treatments were consisted of application of Glyphosate (Round-up 41% SL) at doses of 6 L.ha-1 and 10 L.ha-1 plus 2% (v/v) ammonium sulfate, Haloxyfop-R-methyl (Galant Super EC10.8) at the rate of 1 L.ha-1. Treatments were applied at two growth stages (the early vegetative and onset of generative growth stage). To apply flaming, mature plants were exposed to flame in durations of 0, 10, 30 and 60 seconds. Flaming and herbicide efficiency were visually evaluated after 14 days. Furthermore, plants were harvested after 30 and 60 days. Number of tillers, fresh and dry weight of shoot and root were recorded. The results showed that flaming was not able to control vetiver grass at least at the range of flaming durations applied under this study. Glyphosate could control plant growth even at its lowest dose.