用芹菜素(apigenin)和曲酸(kojic acid)浸渍处理甜菜夜蛾(Spodoptera exigua Hubner)5 龄幼虫, 试虫体重日增长
值明显降低, 而用香草酸(vanillic acid)浸渍处理后的幼虫体重与对照相比无明显差别。 体外抑制实验表明, 芹菜
素、香草酸和曲酸对试虫酚氧化酶活性抑制的 I50分别为 77 .66、724.50 和 82.70μg mL;体内抑制实验表明, 当用上述
3 种化合物(1 000 μg mg)处理幼虫 48 h 后, 酚氧化酶活力抑制率分别达到 40 .05%、8 .44%和 42 .29%
 

Effects of three natural compounds ( apigenin, kojic acid and vanillic acid)on the phenoloxidase activity in Spodoptera exigua Hubner were studied. The results showed that the growth of the lavae of the tested insect reduced sharply when it was treated by apigenin and kojic acid but it does not difference significantly by vanillic acid compared with the controlled experiment. The I50 in vitro on lavae phenoloxidase activity with apigenin, vanillic acid and kojic acid were 77. 66, 724. 50 and 82. 70μ g/ mL respectively. The inhibiting rate in vivo corresponding on phenoloxidase were 40. 05%, 8. 44%and 42. 29%respectively with the three compounds ( 1 000 μ g/mg).