Author(s):

Murugan G, MS Bhagavathi, P Stalin, R Gobi and A Balasubramanian

Abstract: The field experiment was conducted to “study the different irrigation practices on weeds in different rice ecosystems at Annamalai University Experimental Farm, Annamalai Nagar during Navarai season of 2016. Nine treatments combinations were studied in RBD with three replications. The treatments comprised of direct dry seeded rice, direct wet seeded rice and manual transplanted rice with flooding throughout the crop growth, saturation up to panicle initiation, and alternate wetting and drying. All treatments significantly influenced the weed biometrics, and yield of rice. The lowest weed population (22.99), weed dry weight of (114.89 g), highest weed control index of 67.05 and grain yield of 5590 kg ha-1 were obtained with manual transplanting with flooding throughout the crop growth. The highest weed population, weed dry weight, lowest weed control index and lowest grain yield were recorded with direct dry seeded rice with alternate wetting and drying.

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