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RICE-the staple food - weed management

Panicum repens

Family- Poaceae

Scientific name – Panicum repens L.

Common name – S – etora, T – inji-pul, E – Torpedo grass  

Synonyms –

  • Panicum aquaticum A.Rich., P. arenarium Brot., P. chromatostigma Pilg.. P. convolutum Beauv. ex Spreng., P. hygrocharis Steud., P. ischaemoides Retz., P. leiogonum Delile, P. nyanzense K. Schum

Lifespan – Perennial


  • Plant – erect, upto about 1m high flowering pseudostems
  • Stem –creeping underground rhizomes  with sharp-pointed tips; nodes often swollen with viable buds
  • Leaf – Green; flat or folded along central vein; 7–25 cm long; sometimes a whitish, waxy layer is present on the underside
  • Inflorescence -panicle, branched; 7–22 cm long

Biology and ecology – 

  • Propagate primarily by rhizome fragments
  • Viable seeds are rarely produced
  • Prefer wet habitats
  • Grow well on moist, sandy soils and in upland crop fields
  • Tolerant to drought and temporarily flooded conditions

Agricultural importance –

  • Serious weed in tice.
  • Reported to suppress the germination and growth of other plants
  • May act as an alternative host to rice leafhopper species and plant pathogens such as Ustilago (smut) and Pyricularia species
  • Displace native vegetation, particularly in or near shallow waters and may impede water flow in ditches and canals


Chemical control – use of recommended herbicides

Photo credits –

  • https://inspection.canada.ca
  • https://www.invasive.org
  • http://www.plantsoftheworldonline.org
  • https://www.plantwise.org
  • https://www.teline.fr