Trogoderma granarium Everts (Coleoptera: Dermestidae) is one of the most important quarantine pests of stored grains. Control of this insect species can be achieved through a gaseous insecticide, phosphine. Many studies focus on the effect of phosphine on different developmental stages of insects, with most of them highlighting eggs as the most tolerant stage. Our data showed that 2-d-old eggs of T. granarium are more susceptible than 1-d-old eggs. Faster hatching was observed in eggs exposed to phosphine for 2 d compared to controls and the result was more pronounced for 1-d-old than 2-d-old eggs. In contrast to the 2-d exposure, hatching rates of eggs exposed to 4 and 6 d were notably reduced, while there was a delay in egg hatching compared to controls. Moreover, larval development from untreated eggs was faster than the larvae from treated eggs, regardless of the exposure time. These dissimilar patters in larval growth may suggest certain delayed effects of phosphine fumigation. The results of the present work can be further utilized for the development of phosphine-based quarantine and pre-shipment treatments for the control of T. granarium.

中文翻译：

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磷化氢对卡普拉甲虫（鞘翅目：皮甲科）卵的杀虫作用

Trogoderma granarium Everts (Coleoptera: Dermestidae) 是贮藏粮食中最重要的检疫性害虫之一。可以通过气态杀虫剂磷化氢来控制这种昆虫物种。许多研究关注磷化氢对昆虫不同发育阶段的影响，其中大多数强调鸡蛋是最耐受的阶段。我们的数据显示，2 d 龄的 T. granarium 卵比 1 d 龄的卵更容易受到影响。与对照组相比，在暴露于磷化氢 2 天的鸡蛋中观察到更快的孵化，并且 1 天龄的鸡蛋比 2 天龄的鸡蛋更明显。与 2 天暴露相比，暴露于 4 天和 6 天的鸡蛋的孵化率显着降低，而与对照组相比，鸡蛋的孵化延迟。而且，无论暴露时间长短，未经处理的卵的幼虫发育都比处理过的卵的幼虫快。这些幼虫生长的不同模式可能表明磷化氢熏蒸的某些延迟效应。本工作的结果可进一步用于开发基于磷化氢的检疫和装运前处理以控制 T. granarium。