In biological control of Paratrioza sinica, nymphs are important stages because of both ecto‐ and endoparasitoid which act as effective agents. However, endoparasitoid is often trapped fatally by P. sinica nymphs due to strong host immunity. The cover photo shows P. sinica nymphs on the Lycium barbarum leave surface and endoparasitoids act inside the body of nymphs. Around them, some egg shells with stalks of P. sinica are standing on the wolfberry leave (see pages 815‐825). Photo provided Run‐Zhi Zhang.

中文翻译：

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封面说明

在中华绒螯蟹的生物防治中，若虫和外寄生虫都是有效的药剂，因此若虫是重要的阶段。然而，内寄生蜂往往是致命被困P.蛉幼虫由于强烈的宿主免疫。封面照片显示枸杞离开表面时的中华若虫若虫和内寄生物在若虫体内起作用。在他们周围，用秸秆一些蛋壳P.蛉是站在枸杞休假（见页815-825）。提供的照片张润志。