Synergistic effect of metabolic enzyme inhibitor PX on barnyardgrass control
To solve the problem of herbicide control,an indoor pot test was conducted to investigate the effect of three metabolic enzyme inhibitors on the control of barnyardgrass by quinquefolium,atrazine,nicosulfuron,nitroxsulfuron and allylhydrazine,and in particular,to determine the potentiating effect of the metabolism enzyme inhibitor,PX,on the five herbicides at different concentrations,and changes in the activities of glutathione S-transferase (GST) and cytochrome P450 (CYP450) of the barnyardgrass after mixing with atrazine. The results showed that among the three metabolic enzyme inhibitors,PX had the most significant synergistic effect on five herbicides,namely,quinquefolinate,atrazine,nicosul-furon,nitroxsulfuron and alloxan. Different concentrations of metabolic enzyme inhibitor PX had differ-ent synergistic effects on different herbicides,among which 75 g (a.i.)/hm2 of metabolic enzyme inhibi-tor PX was most effective against atrazine,with an increase of 35.33 and 37.33 percentage points in plant control and fresh weight control,respectively. After mixing atrazine with metabolic enzyme inhibi-tor PX,the GST and CYP450 activities of barnyard grass were significantly reduced compared with the control. It shows that the mixing of herbicide and metabolic enzyme inhibitor PX can increase the effect of herbicide on barnyardgrass,and can achieve the purpose of reducing the application of herbicides.
万方数据
维普
