This document discusses four important sedge weeds that impact rice production: Cyperus iria, Cyperus difformis, Cyperus rotundus, and Fimbristylis miliacea. It provides details on the characteristics and impacts of each weed, such as being annual or perennial, erect growth form, seed production, and interference with rice crops. Management strategies discussed include various cultural practices like field preparation, summer tillage, crop rotation, and intercropping as well as herbicides and manual removal of tubers.
1. AGR 301 PRACTICAL CROP PRODUCTION
(0+2)
SEDGE WEEDS OF RICE ECO-SYSTEM
Presented by
Lokesh .M (2019031031)
2. WHAT IS WEED ?
• In general weed is the any plant
where it is not wanted.
• Weeds are the plants which are
undesirable, persistent, damaging
and interfere with human activities
,agriculture and natural processes
and economy of the country.
4. SEDGES
• A grasslike plant with triangular
stems and inconspicuous flowers
, growing typically in a wetland.
• Sedges are widely distributed
throughout the world.
• These are the perennial in nature.
5. 4 most important sedge weeds in rice are,
Cyperus iria
Cyperus difformis
Cyperus rotundus
Fimbristylis miliacea
12. REFERENCES
• Weed management principles and
practices O. P. Gupta, third edition , M/s
AGRIBIOS (INDIA), 2019.
• Weeds of rice in Asia by B. P. Caton,
M.Mortimer, et.al., 2010.
• https://www.knowledgebank.irri.org
• https://www.agritech.tnau.ac.in
