The control effectiveness of three herbicides on Solanum rostratum at its seedling stage

A experiment was conducted to determine the control effectiveness of the 9 combination treatments of three herbicides on Solanum rostratum at its preemergence, cotyledon, one leaf, two leaf, three leaf, four leaf period stages, and these herbicides included the 2,4D, butyl acetate with 72% of quality score, Maize herbicide suspending agent with 40% of quality score, and Paraquat aqueous solution agent with 40% of quality score. The results of this study showed that three treatments performed well the control effectiveness on S. rostratumis, and they were 72% 2,4D, butyl acetate and 40% Maize herbicide suspending agent, and 20% Paraquat aqueous solution agent, however, the control effectiveness of 72% 2,4D, butyl acetate and 20% Paraquat aqueous solution agent on S. rostratumis gradually decreased when seedling grew up.