Tank mix application of cyhalofop-butyl with selected herbicides for weedcontrol in wet-seeded rice

摘要

Herbicidal weed control is becoming very common in rice cultivation in India (Rao et al. 2007). Recently farmers are opting for use of single application of herbicide mixtures in rice fields for broad-spectrum control of weeds. Cyhalofop-butyl is a cost -effective post- emergence selective herbicide that controls grass weeds especially Echinochloa spp. and Leptochloa chinensis (Saini et al. 2001). As it is not effective against sedges or broad-leaf weeds, a follow up application of broad spectrum herbicides is usually recommended. However, to reduce the cost of spraying, farmers prefer tank mix application of these herbicides to have broad spectrum weed control in a single application. However, this practice often leads to herbicide antagonism though synergistic effects are also reported. So the present study was conducted to find out the best herbicide that can be tank mixed with cyhalofop-butyl, so that effective control of weeds can be achieved, while reducing the cost of cultivation.