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几丁质合成抑制剂对小菜娥ＰｌｕｔｅｌｌａｘｙｌｏｓｔｅｌｌａＬ．４龄幼虫毒力测定的结果显示，ＸＲＤ－４７３、农梦特、卡死克、抑太保、灭幼脲１号、灭幼脲３号的毒力值（ＬＣ５０）分别为０．４７６８、０．８６６９、１．０７５４、１．２３８９、２７．０６８０和３６．８５９１ｐｐｍ。国外生产的几丁质合成抑制剂毒力显著高于国产的品种，这类药剂的毒力又明显高于常规药剂敌敌畏、氯氰菊酯、杀虫双等，它们的毒力值（ＬＣ５０）分别为８１８．０３１５、６４１９．９８４２、５５７．４９２５ｐｐｍ。抑太保对小菜蛾幼虫作用方式的研究结果表明，该药剂以胃毒为主，兼有触杀作用。以抑太保、卡死克５０ｐｐｎ的药液饲喂的小菜蛾雌、雄成蛾寿命比单用５％蜜糖水饲喂的个体缩短１天和４天左右，产卵量减少２／３，卵孵化率显著降低。用抑太保、卡死克５０ｐｐｍ的药液浸渍的小菜蛾卵孵化率分别为５．３５％和０。温度对抑太保的毒力有较大影响，在试验温度范围内（１０—３０℃），抑太保１０ｐｐｍ处理的小菜蛾种群５０％或７５％、９５％群体致死时间随着温度上升而缩短。
Chitin Synthesis Inhibitor to Small Vegetable E PlutellaxylostellaL. The results of virulence determination of 4th instar larvae showed that the virulence values (LC50) of XRD-473, Nongmengte, Cajc, Epimedium, Chlorbenzuron-1 and Chlorbenzuron-3 were 0.4768 and .8669, 1.0754, 1.2389, 27.0680, and 36.8591 ppm. The toxicity of chitin synthesis inhibitors produced abroad was significantly higher than that of the domestic ones. The toxicity of these agents was significantly higher than that of the conventional ones, such as dichlorvos, cypermethrin and pest insecticide. Their LC50 values were 818 .0315, 6419.9842, 577.4925 ppm. Coptis against Plutella xylostella larvae of the results of the study showed that the drug to stomach poisoning, both contact and kill. To Coptis, card death grams of 50ppn liquid feeding female diamondback moth, male adult moths fed only 5% honey shortened by 1 day and 4 days, reducing the amount of eggs laid 2/3, egg Incubation rate decreased significantly. The egg hatching rate of Plutella xylostella dipped by the solution of 50ppm of CPB and CaCl2 was 5.35% and 0% respectively. The temperature had a significant effect on the virulence of Coptis chinensis, and 50% or 75% of the population of Coptis concanus exposed to 10 ppm CPP within the experimental temperature range (10-30 ° C). The lethal time of 95% of the population shortened as the temperature increased.