The easiest and most effective way to kill Monkey Grass is to apply an herbicide containing glyphosate or triclopyr. It is important to note that the herbicide should be applied to the lawn or grass area in early spring before the new growth of Monkey Grass appears. With proper use and timing, the herbicide will effectively kill the Monkey Grass without damaging the desired turf grass.
Additionally, it is advisable to apply a pre-emergent herbicide the following season after the Monkey Grass has been killed as a preventative measure.