Weedy Rice, Red rice, (ORYSA) monocot

Catalogue Type

Weed Catalogue

Scientific Name

Oryza sativa L.

Family

Poaceae

Distinguishing Characters

introduced to fi elds as seeds in irrigation water,
contaminated tillage and harvesting equipment, and
contaminated seed supplies. Originates as result of hybridization
between O. rufi pogon or O. nivara and O. sativa
cultivars, or between cultivars, through selection of weedy
traits or through segregation from landraces. Key weedy
traits are early grain shattering and variable dormancy.

Photo of Weed

Description

Found in: lowland Establishment method: WS, DS
Moisture: moist to flooded
Emergence time: with sown crop or soon after
Competitiveness: high Seed contaminant: yes
Cultural control: stale seedbed, early fl ooding, hand
weeding, water seeding, transplanting rice Reported resistance: none Life cycle: annual Seed wt: 20-30 Method(s) of reproduction: seeds Elevation: as for rice crop Light: as for rice crop