Two experiments were conducted in mixed hardwood-conifer forests in the northeastern United States to test the effects of cleaning surfactant and non-surfactant treated multiple-funnel traps used to catch bark and woodboring beetles. Large amounts of pollen and other debris often form a crust on the interior of traps (personal observations). Such surface deposits may provide footholds for beetles to escape capture in traps. In one experiment, we tested cleaned surfactant and non-surfactant traps against non-cleaned surfactant and non-surfactant traps. In a second experiment, we tested field cleaning of modified multiple-funnel traps as an alternative to substituting clean traps on each collection visit. There was no effect of surfactant treated traps, cleaned or not, on total beetles or individual bark beetle species captured. However, in situ cleaned traps were statistically better at capturing total beetles, total bark beetles, and several bark beetle species than non-cleaned control traps. Surfactant-treated non-modified traps and cleaned modified traps had higher species richness and abundance than other treatments at the site level. Our results suggest that cleaning traps to remove accumulated pollen and debris may be helpful for some species but would have limited benefit for broad-scale trapping of bark and woodboring beetles in northeastern forests.

中文翻译：

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清洁多漏斗陷阱对美国东北部树皮和Wood虫的捕获的影响

在美国东北部的硬木针叶树混交林中进行了两个实验，以测试清洁表面活性剂和未经表面活性剂处理的多通道捕虫器的效果，该陷阱用于捕获树皮和木钻甲虫。大量的花粉和其他碎屑通常会在陷阱内部形成一层外壳（个人观察）。这种表面沉积物可能为甲虫提供立足点，使其逃脱陷阱中的捕获。在一个实验中，我们针对未清洗的表面活性剂和非表面活性剂阱测试了清洗的表面活性剂和非表面活性剂阱。在第二个实验中，我们测试了改进的多漏斗阱的现场清洁，以替代每次收集访问时替换清洁阱的方法。表面活性剂处理过的捕集阱，无论是否清洗，对捕获的总甲虫或单个树皮甲虫都没有影响。然而，从统计学上讲，与未清洗的对照陷阱相比，原位清洗的陷阱在捕获总甲虫，总树皮甲虫和几种树皮甲虫方面要更好。经表面活性剂处理的非改性捕集阱和清洁的改性捕集阱比该地点一级的其他处理具有更高的物种丰富度和丰度。我们的结果表明，清洁诱集装置以去除积累的花粉和碎屑可能对某些物种有用，但对于东北森林中大规模捕获树皮和木甲虫的效益有限。