BT油悬剂防治落叶松毛虫试验

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

通过分别使用8000IU·μL-1BT油悬剂用量3000、4500、和6000mL·hm-2及25%灭幼脲悬浮剂2000倍液、清水空白作对照等5个处理进行落叶松毛虫防治试验,结果表明:应用8000IU·μL-1BT油悬剂用药量为4500和6000mL·hm-2情况下,用药后14d的防治效果为96.6%和98.3%,分别比25%的灭幼脲2000倍液防治效果高2.5和4.2个百分点;用柴油对药剂稀释10倍后防治,对落叶松不产生药害。

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.