Terrestrial Plants: Cogon Grass (Imperata cylindrical)
Origin and Date of Introduction: Asia; 1911-1920s.
Pathway / Media: Disturbed land paralleling highways; nurseries and packing material in shipping crates.
Reason for Introduction: Accidental, as packing material in shipping crates in Mobile, Alabama; deliberate, as an ornamental, to control erosion, and for livestock feed.
Preferred Habitat: Sandy soils with low nutrients, non-cultivated areas, and areas with some disturbance.
Ecological / Economic Damage: Decreases biodiversity among native grasses and the animals that depend on them; very flammable. Cogon grass invades disturbed areas such as highway shoulders, forming a dense mat that excludes native grasses.
Control Options: Herbicides and constant tillage; mowing and burning are not effective for long-term eradication.
Photo: Alabama Cooperative Extension System (Auburn Univeristy, Alabama A&M University)
Futher Reading: USDA Invasive Species Information Center