澳大利亚和美国科学家研制成功一种能干扰昆虫生活史 ,阻止其发育到正常成虫的新一代化学杀虫剂。这种新型杀虫剂攻击昆虫的保幼激素 ( juvenil hormone) ,而在高等动物中没有保幼激素 ,因此对脊椎动物和人无害。　　科研人员利用克隆的调控昆虫保幼激素水平的 2种蛋白将这种杀 Australian and U.S. scientists succeeded in developing a new generation of chemical insecticides that interfere with the life cycle of insects and prevent their development to normal adults. The new insecticide attacks insect juvenil hormones, while juvenile hormones are absent in higher animals and are therefore harmless to vertebrates and humans. Researchers make use of the two proteins that regulate cloning of juvenile hormone levels in insects