Effect of weed control methods on performance of rice varieties under upland rainfed conditions of Nagaland.

Borreria liispida, Ageratum conyzoides, Digit aria sauguinalis, Sctaria glauca and Cynodon dactylon were the major weed species in upland rice in Nagaland. Butachlor 1.0 kg/ha with one hand weeding 30 d a s reduced the weed density and dry weight significantly ever butachlor 2.0 kg/ha and resulted in significantly higher grain yield. Two hand weedings was next best. Butachlor (2.0 kg/ha) reduced the yield of Naga-special and Jaya varieties and yields were ai par with weedy check. Naga-special yielded highest when weeds were controlled by two hand weedings.