Barnyardgrass and Watergrass, Echinochloa spp. Seedling leaf has parallel veins a dull or gray-green surface no ligule stems are flattened and purple-tinged foliage of young plant mostly without hairs
Early watergrass flowers 40 days after flooding for about a month awns are typically long	Late watergrass heads 90 days after flooding awns are usually short
Mature plant (watergrass) is upright, stout, 6 inches to 6 feet high has large seed drooping flower head
	Note the collar region of barnyardgrass (left) compared with rice, Oryza sativa (right). Rice leaves have parallel veins a dull surface ligule and auricles.
Management Pre-flood cultivation to dislodge plants before secondary roots grow Maintain water level at 5 to 7 inch depth during the first month of rice establishment Herbicides, properly timed Crop rotation when infestations are very severe

Rice Home | Rice Weeds

Modified: 11 Sep 1997 Comments to jayoung@ucdavis.edu