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水葫芦(Eichhornia crassipes(Mart)Solms)叶柄的丙酮粗浸提物,当以局部接触施用于棉红(Dysdercrus cingulatus Fabricius)时,表现出很高的保幼激素活性,抑制若虫羽化,产生超龄若虫,成虫形态和性腺发育畸形,卵胚胎发育也受抑制。当以食物方式处理赤拟谷盗时,含量达万分之一即引起五龄幼虫100%死亡。由于不同昆虫敏感性的差异,在对热带家蝇、蓖麻夜蛾的试验中未呈现保幼激素效应。这种拟保幼激素在害虫防治中应
The crude acetone extract of the petiole of Eichhornia crassipes (Mart.) Solms peaches showed high juvenile hormone activity when applied to cotton red (Dysdercrus cingulatus Fabricius) by topical contact, inhibiting nymph eclosion and producing over-age nymphs , Adult morphology and gonadal deformity, egg embryo development is also inhibited. When food is processed in the form of Tribolium, 100% of the 5th instar larvae are killed at a level of 1%. Due to differences in the sensitivity of different insects, juvenile hormone effects did not appear in tests on tropical housefly and castor budworm. This juvenile hormone in pest control should be