Department of Entomology, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA.
J Econ Entomol. 2010 Jun;103(3):641-7. doi: 10.1603/ec10013.
The most effective traps for capturing cerambycids and other saproxylic beetles are intercept designs such as funnel traps and cross-vane panel traps. We have observed that adult cerambycids of many species often alight and walk upon panel traps, and few are actually captured. In an effort to improve trap capture and retention, researchers have treated intercept traps with Rain-X, a polysiloxane formulation that renders surfaces more slippery. Here, we summarize experiments that compared the efficacies of Rain-X and Fluon, a PTFE fluoropolymer dispersion, assurface treatments for panel traps that are deployed to capture cerambycid beetles, using untreated traps as controls. Fluon-treated traps captured on average > 14x the total number of beetles, and many more cerambycid species, than were captured by Rain-X-treated or control traps. Beetles captured by Fluon-treated traps ranged in body length by 350%. They could not walk on vertical panels treated with Fluon but easily walked on those treated with Rain-X and on untreated traps. Moreover, a single Fluon treatment remained effective for the entire field season, even in inclement weather. We conclude that treating panel traps with Fluon greatly improves their efficiency in capturing cerambycid beetles. This increased efficacy will be particularly important when traps are deployed to detect very low-density populations, such as incursions of exotic species, or remnant communities of rare and endangered species. The influence of Fluon on trap efficiency may vary with product formulation and its source and also with climatic conditions.
捕获天牛科和其他腐木甲虫最有效的陷阱是截获设计，例如漏斗陷阱和交叉叶片板陷阱。我们观察到，许多物种的成年天牛经常降落在板状陷阱上并在上面行走，但很少有真正被捕到的。为了提高陷阱的捕获率和保留率，研究人员用 Rain-X 处理截获陷阱，Rain-X 是一种聚硅氧烷配方，使表面更滑。在这里，我们总结了使用未处理的陷阱作为对照，比较了 Rain-X 和 Fluon（一种 PTFE 氟聚合物分散体）作为板状陷阱表面处理以捕获天牛科甲虫的实验效果。Fluon 处理的陷阱平均捕获的甲虫总数是经 Rain-X 处理或对照陷阱的 14 倍以上，捕获的天牛科物种也多得多。Fluon 处理的陷阱捕获的甲虫体长范围为 350%。它们无法在涂有 Fluon 的垂直面板上行走，但很容易在涂有 Rain-X 和未处理的陷阱上行走。此外，单次 Fluon 处理在整个野外季节都保持有效，即使在恶劣天气下也是如此。我们得出结论，用 Fluon 处理板状陷阱可大大提高其捕获天牛科甲虫的效率。当陷阱用于检测非常低密度的种群时，例如外来物种的入侵或稀有和濒危物种的残余群落，这种更高的效率将尤为重要。Fluon 对陷阱效率的影响可能因产品配方及其来源以及气候条件而异。
