Experiments of Controlling Dendrolimus superans by Using BT Oil Miscible Flowable Concentrates

Using 8 000 IU·μL -1 BT oil miscible flowable concentrates with the dosage of 3 000,4 500,6 000 mL·hm -2 and 25% chlorbenzuron with the dosage of 2 000 times,taking clear water as CK,experiments of controlling Dendrolimus superans were conducted.Results showed that the mortality of Dendrolimus superans reached 96.6%,98.3% respectively after using 8 000 IU·μL -1 BTOF with the dosage of 4 500 ,6 000 mL·hm -2 and were 2.5%,4.2% higher than 25% chlorbenzuron with the dosage of 2 000 times.It showed no harm on larch by using diesel oil to dilute pharmacy 10 times.