摘要
用Ｈ３ａ３ｂ、Ｈ４ａ４ｃ、Ｈ４ａ４ｂ１、Ｈ４ａ４ｂ２四种Ｂｔ制剂对落叶松毛虫进行了室内毒力测定．其毒力（ＬＣ５０）大小为Ｈ４ａ４ｂ２＞Ｈ４ａ４ｂ１＞Ｈ３ａ３ｂ＞Ｈ４ａ４ｃ，且落叶松毛虫对Ｈ３ａ３ｂ敏感性差异最小，对Ｈ４ａ４ｂ２敏感性差异最大．再结合毒力曲线及相关系数（ｒ）筛选出一种对落叶松毛虫毒力较强的制剂Ｈ４ａ４ｂ１，它对１、２龄幼虫的ＬＣ５０分别为每毫升０．８１亿芽孢和１．０４亿芽孢．
Dendrolimus superans on poison were Measured indoor using four Bt preparations,they were H 3a3b ,H 4a4c ,H 4a4b 1 ,H 4a4b 2 .The poisonous order was H 4a4b 2 >H 4a4b 1 >H 3a3b >H 4a4c .Difference of sensitiveness of Dendrolimus superans was the worst for H 3a3b ,and was the strongest for H 4a4b 2 .H 4a4b 1 preparation was elected through poisonous curves and relative coefficient,Its poison for 1～2a Larvae were 81 million gemma per mL and 104 million gemma per mL.
关键词
BT
毒力测定
落叶松毛虫
Bt,Poisonous measurement, Dendrolimus superans
