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以齿唇姬蜂（Ｃａｍｐｏｌｅｔｉｓ ｃｈｌｏｒｉｄｅａｅ）及其寄主棉铃虫（Ｈｅｌｉｃｏｖｅｒｐａ ａｒｍｉｇｅｒａ）为模型，研究了内寄生蜂对寄主血淋巴酚氧化酶（ＰＯ）的影响．结果表明，棉铃虫被寄生后，血淋巴的体外黑化率显著下降，酚氧化酶的活性被抑制．寄生后４８ ｈ，血浆中 ＰＯ的活性降低约 ８３％．注射０．５雌蜂当量的萼液对ＰＯ活性的影响与寄生相似，这表明寄生引起的ＰＯ活性的下降与寄生蜂萼液中所含成分有关．进一步研究表明，在正常未寄生情况下，血细胞中的酚氧化酶原（ｐｒｏＰＯ）可被牛胰蛋白酶激活，而在寄生及注射萼液后，血细胞中的ｐｒｏＰＯ则不能被牛胰蛋白酶激活，而且活性略有下降．以上结果显示，齿唇姬蜂对棉铃虫的寄生造成了ＰＯ的活性下降，而且这种抑制与寄生蜂的萼液有关，抑制的原因可能是萼液成分（多分ＤＮＡ病毒等）抑制了ｐｒｏＰＯ在血淋巴中的表达或加速其降解所致．
The effects of endoparasites on the parasite hemolymph phenoloxidase (PO) were studied using a model of Campoletis chlorideae and its host Helicoverpa armigera. The results showed that after the cotton bollworm was parasitized, the in vitro blackening rate of hemolymph decreased significantly and the activity of phenoloxidase was inhibited. 48 h after parasitization, PO activity in plasma was reduced by about 83%. The effect of calyx solution injected at a fecal equivalent of 0.5 on PO activity was similar to that of the parasites, suggesting that the parasitic drop in PO activity is related to the composition of the parasitoid calyx solution. Further studies have shown that proPO in blood cells can be activated by bovine trypsin under normal non-parasitic conditions, whereas proPO in blood cells can not be activated by bovine trypsin after parasitization and injection of calyx fluid Activity decreased slightly. The above results showed that the parasitoids of Helicoverpa armigera caused a decrease in the activity of PO, and this inhibition was related to the calyx liquid of the parasitoids. The inhibition may be due to the inhibition of proPO in the calyx liquid component (multiple DNA viruses, etc.) Hemolymph expression or accelerate its degradation.