early barnyard grass

Echinochloa oryzoides (Ard.) Fritsch is a grass species in the Poaceae family, known as early barnyard grass. It is widely distributed across regions including the Afrotropical, Australasian, Neotropical, Oriental (Indomalaya), Palaearctic, and Pacific (Oceania) areas, as well as countries like Belgium, France, and Russia. This grass is a major weed in rice cultivation, particularly problematic due to its Vavilovian mimicry of rice plants, which complicates its removal from rice paddies. First described in 1891, Echinochloa oryzoides is recognized for its invasive potential in agricultural settings.