Effect of separate and tank-mix treatments of herbicides on weed control and yield of corn (Zea mays L.).

摘要

Field studies were conducted at Center of Research Agriculture, Fars-Zarghan, Iran in 2009 to investigate the effect of separate and tank-mix herbicide treatments on weed control and corn yield. Tank-mix herbicide treatments including 16 combinations applied treatments consisted of two herbicides: nicosulfuron with four doses 0, 1, 1.5 and 2 l/ha and bromicid with four doses 0, 0.5, 1 and 1.5 l/ha. There were 16 treatments such as n0+b0, n0+b0.5, n0+b1, n0+b1.5, n1+b0, n1+b0.5, n1+b1, n1+b1.5, n1.5+b0, n1.5+b0.5, n1.5+b1, n1.5+b1.5, n2+b0, n2+b0.5, n2+b1 and n2+b1.5. Herbicides reduced weed biomass compared with the weedy check. Minimum reduction in weed biomass was observed with bromicid at 0.5 l/ha and maximum reduction in weed biomass was observed with nicosulfuron at 1 l/ha and bromicid 0.5 l/ha. The results showed that all the tank-mix treatments were better than the separate treatmeants of herbicides. The results also indicated that the best treatment was nicosulfuron 1 l/ha+bromicid 0.5 l/ha (n1+b0.5) in relation to yield corn and control of weeds in comparison with other treatments in tank-mix and maximum corn grain yield was obtained with combinations of nicosulfuron 1+bromicid 0.5 l/ha.