Abstract:

Field efficacy trail was conducted to define the control effect on Cirsium setosum by 18 herbicides of different mechanism of action such as dicamba, tribenuron-methyl, 2,4-D butylate.picloram and so on. The results showed that the amount and weight control effects of 26% 2,4-D butylate.picloram and 48% dicamba were 71.19%, 70.69% and 91.63%, 88.67% respectively and higher than other herbicides on the thirty day after treatment. The control effect of 10% fluoroglycofen-ethyl and 41% glyphosate were followed, and the amount control effects were 64.88% and 63.15% respectively, and the weight control effects were both 84.69%. The control effect of other herbicides was lower than 60%. Resuscitation rate of Cirsium setosum in paraquat, bromoxynil octanoate and lactofen treatment areas were higher than others, and control effect was reduced on the 30 days after treatment.