Efficacy of Chlorpyrifos 480g/L EC against Cnaphalocrocis medinalis in Paddy Fields

A field trial on the control of chlorpyrifos 480 g/L EC against Cnaphalocrocis medinalis was carried out in the rice plant field.The results showed that the control efficacy of chlorpyrifos 480 g/L EC against Cnaphalocrocis medinalis was 66.24%、 72.66% and 83.88%,respectively,at the application rate of 150 g/hm2,300 g/hm2 and 600 g/hm2.