In order to determine the defoliation effects,yield and quality characteristics of pyraflufen-ethyl 2％ME sprayed by UAV on cotton at low temperature,field experiments were conducted.The results showed that the different treatments of pyraflufen-ethyl 2％ME had good defoliation effects and promoting flocculation effects on cotton.At the 15th day after spraying,the defoliation rate was over 83.8％,and the flocculation rate was over 80％,which had significantly different with thidiazuron·diuron 540 g/L SC.Pyraflufen-ethyl 2％ME had little effects on the yield,cotton fraction,fiber length and other qualities of cotton,and could be popularized under low temperature conditions.
维普
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