Control efficacy of 6 pesticides against Cnaphalocrocis medinalis under field condition

A trial on control efficacy of 6 pesticides against Cnaphalocrocis medinalis was conducted under field condition.The results showed that the control efficacies of 200 g /L chlorantraniliprole( SC),25 g /L Spinosad( SC),240 g /L metaflumizone( SC),50 g /L lufenuron( EC),100 g /L chlorfenapyr( SC),500 g /L profenofos( EC) on Cnaphalocrocis medinalis reached 61. 11%- 88. 58%,the controlling effects of pest population were 51. 99%- 97. 35%. Among which,240 g /L metaflumizone( SC) showed the best effect on controlling Cnaphalocrocis medinalis,and the efficacy were 88. 58% and87. 65%,respectively,when applied 100 g and 130 g per 667 m2. In this experiment,6 pesticides were tested under reasonable dosages,which were safe to rice production and could be used to substitute the high toxic pesticides for controlling Cnaphalocrocis medinalis.