Reducing and synergistic effect of spray adjuvant and electrostatic spray on the application of clodinafop-propargyl

The reducing and synergistic effects of three spray adjuvants, including 63% Jijian AS, 3% Anrongle SE and 75% Chaojiabi EC, and electrostatic sprayer on clodinafop-propargyl were determined by field experiments. The results showed that the spray adjuvants Jijian, Anrongle and Chaojiabi had obvious synergistic effects on clodinafop-propargyl applied by knapsack manual sprayer. The total weed control efficacy of 15% clodinafop-propargyl WP 34 g a.i./hm² plus Jijian 225 mL/hm², Anrongle 90 mL/hm² or Chaojiabi 240 mL/hm² (dosage of preparation, the same below) was significantly better than that of 15% clodinafop-propargyl WP 34 g a.i./hm² and 45 g a.i./ hm² alone. The control efficacy of 15% clodinafop-propargyl WP 34 g a.i./hm² plus Jijian 225 mL/hm² or Anrongle 90 mL/hm² was the same as that of 15% clodinafop-propargyl WP 68 g a.i./hm² alone. Compared with conventional sprayer, the application of electrostatic sprayer significantly improved the control efficacy of 15% clodinafop-propargyl WP on weeds. The control efficacy of 15% clodinafop-propargyl WP 34 g a.i./hm² sprayed by electrostatic sprayer was significantly better than that of 15% clodinafop-propargyl WP 68 g a.i./hm² sprayed by conventional sprayer. The applications of spray adjuvants and electrostatic sprayer were safe to wheat growth and could increase wheat yield obviously, which were effective measures to reduce the amount of herbicides.