This post is part of the Science Tuesday feature series on the USDA blog. Check back each week as we showcase stories and news from the USDA’s rich science and research portfolio.
Cogongrass makes kudzu look like a lightweight. A perennial grass, it grows on every continent except Antarctica and has earned a reputation as one of the worst weeds on Earth. In the South, cogongrass ranks among the top 10 plant marauders, invading forests, rights-of-way, and agricultural fields, literally taking over the landscape and altering ecosystems.
Native to Southeast Asia, the weed first arrived in the United States in 1912 as packing material in orange crates imported to Grand Bay, Alabama. A few years later, farmers planted cogongrass in Mississippi as a possible forage crop. Since then, it’s spread to more than 66,000 acres throughout the South, its progress limited only by winter cold. Landowners and agencies have fought this weed for years with limited success.