Institute of Bio-economy and Agri-technology (iBO), Center for Research and Technology, Volos, Magnesia, Greece.
Laboratory of Entomology and Agricultural Zoology, Department of Agriculture, Crop Production and Rural Environment, University of Thessaly, Nea Ionia, Magnesia, Greece.
J Econ Entomol. 2021 Jun 11;114(3):1389-1400. doi: 10.1093/jee/toab074.
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.
谷蠹（鞘翅目：皮蠹科）是储粮的重要检疫性害虫之一。这种昆虫可以通过磷化氢气体杀虫剂进行防治。许多研究都集中在磷化氢对昆虫不同发育阶段的影响上，其中大多数研究都强调了卵是最具耐受性的阶段。我们的数据表明，2 日龄的谷蠹卵比 1 日龄的卵更容易受到影响。与对照组相比，暴露在磷化氢中 2 天的卵孵化更快，且 1 日龄卵比 2 日龄卵的结果更为明显。与 2 天的暴露相比，暴露于 4 天和 6 天的卵的孵化率显著降低，而与对照组相比，卵的孵化时间有所延迟。此外，未经处理的卵孵化的幼虫生长速度比经处理的卵孵化的幼虫快，而不论暴露时间如何。幼虫生长的这些不同模式可能表明磷化氢熏蒸存在某些延迟效应。本研究的结果可进一步用于制定基于磷化氢的检疫和装运前处理方法，以控制谷蠹。
