Biology of dominant weed species in direct seeded rice (Oryza sativa L.) in Chhattisgarh plains

Abstract

A field experiment was conducted at Raipur to study the Biology of dominant weed species in direct seeded rice (Oryza sativa L.) in Chhattisgarh plains. Major weed flora were allowed to grow Echinochloa colona, Cyperus iria, Alternanthera triandra, Spilanthes acmella, Cyanotis axilaris). Studies on biology of different weed species at different intervals shows the growth pattern, life cycle, seed producing capacity of various dominant weeds, Echinochloa colona (4041 seeds plant -1), Cyperus iria (6550 seeds plant -1), Alternanthera triandra (1788 seeds plant -1), Spilanthes acmella (5920 seeds plant -1) and Cyanotis axillaris (470 seeds plant -1).