Local name: বড় শ্যামাঘাস, ডালঘাস, গোবরা, ঝটঘাস, শ্যামা
English name: Barnyard grass, Barnyard millet, Japanese millet, Water grass, Common barnyard grass, Cockspur
Scientific name: Echinochloa crus-galli
Family: Poaceae
It is an annual weed, resistant to climatic hazard. Similar growth habit with rice; undetectable from rice plants at early growth stages.
Found in wet and flooded soil. Seeds can also germinate under water. Growth becomes increasingly poor with continued submergence. Required similar environment as by rice.
Annual grass; seeds germinate throughout the year.
Mainly rice, then jute, maize and sugarcane.
Propagated by seed, prolific seed producer.
Linear, smooth, dense green; lower side is wide and upper side is narrow, looks like rice leaf.
Stem culm; hollow inter node.
Spikelets have long awn, panicle is long, branched.
Adventitious, fibrous root system.
It can be controlled by hand pulling and racking Contact poison may be used as herbicide.