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应用湖北省医学科学院寄生虫病防治研究所研制的苏云金杆菌以色列变种（Bti）漂浮块剂在现场进行了灭致乏库蚊的效果评价，室内生物测定结果表明：Bti漂浮块剂对致乏库蚊LD50为0.5207g／ml，效价为233IU／ml，在0．4～0．8m2现场水缸中，用10g／m2的剂量，第一次投药持续10天出现2龄幼虫，第二次投药特效可保持11天，因此每10天投一次药可有效控制水缸中蚊幼虫孳生。
Application of Bti floater developed by Institute of Parasitic Diseases, Hubei Academy of Medical Sciences, to evaluate the efficacy of Culex pipiens pallens in the field. The indoor bioassay results showed that Bti floaters had no significant effect on the exhaustive library Mosquito LD50 was 0.5207g / ml, titer was 233IU / ml, 0.4 ~ 0.8m2 in-situ tank, with a dose of 10g / m2, the first administration for 2 days lasted for 10 days, the second Dosing effects can be maintained for 11 days, so every 10 days to vote once the drug can effectively control the water tank mosquito larvae breeding.