Farmers concerned as âprolificâ weed African lovegrass shows signs of resistance to key herbicide WedWednesday 31 MarMarch 2021 at 11:13pm The Eragrostis curvula, or African lovegrass, is considered a noxious weed and can be found growing throughout Australia. ( Print text only Cancel Farmers in New South Wales have raised concerns as a severely invasive weed show signs of resistance towards a key herbicide, in a nationwide first. Key points: Only two chemicals are currently used to prevent the weed's spread in Australia Landholders are encouraged to monitor their paddocks and participate in the expanding survey of the weeds South East Local Land Services investigated 12 populations of African lovegrass from the New South Wales Snowy Monaro region, with results showing five samples tested had become resistant to the herbicide Flupropanate.