Lehmann love grass competition
In Chihuahua, Mexico, Schizachyrium sanguineum was killed out from rangelands over a 20 year period, following the sowing of the invasive Lehmann lovegrass (Eragrostis lehmannia) at a distance of 3000-4500 m from the native grasses (Sanchez Muñoz, 2009).
Fire sensitivity
The seeds are sensitive to fire. In native pastures where fire occurs, Schizachyrium sanguineum progressively disappears (Musso et al., 2014).