Leptochola chinensis is a serious weed of rice. Its ability to withstand waterlogged conditions as well as drained, moist conditions makes it a problem weed in rice
Weedy rice is highly variable and thought to originate from outcrosses to wild species (O. nivara, O. rufipogon) or as a result of outcrossing within domestic rice
Sphenoclea zeylanica weed is reported to cause yield loss of 25−50% in rice. Young plants and tips of older plants are steamed and eaten as a vegetable in Indonesia