Bio-efficacy of Acetachlor+Bensulfuron-methyl Against Weeds in Transplanted Rice

摘要

Weed spectrum and its severity differ in different rice ecologies. The major area of rice in India is under transplanted system. Singh and Bhan (1986) reported the extent of reduction in grain yield due to weeds in transplanted rice to be around 24-48%. Butachlor, pretilachlor and anilofos have been in use for control of weeds, mainly grassy types in transplanted rice. Continuous use of same herbicide over a period of time may result in shift of weed flora and also development of herbicide resistancein few weeds. Bensulfuron-methyl in combination with butachlor has been found to control weeds effectively and produce higher grain yields of rice (Singh et al., 2005). In this context, the present field experiment was undertaken to study the bio-efficacy of a new formulation of acetachlor+bensulfuron-methyl (25% WP) in comparison to commonly used herbicides, for broad-spectrum weed control in transplanted rice.