[Objective ] The research aimed to study the activity and dynamic changes of phenoloxidase in Locusta migratoria manilensis (Mey en). [Method] The body fluid and lymph were prepared by different extract methods, and the activity and dynamic changes of phenoloxidase in different sites were measured. [Result] The phenoloxidase activity in hemolymph was significantly higher than that in body fluid.ami the activi ty in female was higher than that in male. The phenoloxidase activity in body fluid was gradually enhanced with the prolongation of laying time in air.The phenoloxidase activity in hemolymph of adult was also gradually enhanced with the prolongation of time. [Conclusion] Part of phe noloxidase was existed in tissues and cells of L migratoria participating in insect development and construction,and the other part was existed in hemolymph playing an immunological and defensive role. The stability of phenoloxidase was very strong,which was the effective guarantee for wide adaptation ability and strong immunity of insect.%[目的]研究东亚飞蝗酚氧化酶活性及动态变化.[方法]通过不同抽提方法制备虫体体液和淋巴液,测定不同位点酚氧化酶活性及动态变化.[结果]血淋巴中酚氧化酶活性显著高于虫体体液中酚氧化酶活性,且雌虫酶活性显著高于雄虫；虫体体液内酚氧化酶活性随着体外放置时间的延长而显著增强；成虫血淋巴内酚氧化酶活性随着时间的延长而显著增强.[结论]酚氧化酶一部分存在于东亚飞蝗组织和细胞中参与虫体发育和构建,一部分存在于血淋巴中参与免疫防御作用.酚氧化酶稳定性非常强,是昆虫宽泛适应能力和强大免疫能力的有效保障.
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