Sedge weeds of rice eco-system

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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.

3. CLASSIFICATION OF WEEDS

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

6. Cyperus iria , ( Oosi korai ) Erect Smooth Densely tufted Annual sedge 20-70 cm tall.

7. Cyperus difformis – Vatta korai Smooth Tufted Annual sedge Prolific seed production 20 – 60 cm tall

8. Cyperus rotundus - Koraikizhangu Erect Tuber forming Perenninal sedge Persistent Produces many tubers 15 – 20 cm tall

9. Fimbristylis miliacea - Poongorai Erect Tufted Annual sedge Produce many seeds and germinate throughout the season. 20-70 cm tall.

10. Management Field preparation Summer tillage Maintenance of optimum plant population Crop rotation Growing intercrops Stale seedbed Crop management practices

11. Manual digging Herbicide application – SEDGE ENDER ( Prodiamine 2.73%,Sulfentrazone 1.36% )

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

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