Furihata Shunsuke, Tabuchi Ken, Okudera Shigeru, Takahashi Akihiko, Hinomoto Norihide, Shimoda Masami, Yamaguchi Terumi
Division of Agro-Environment Research, Tohoku Agricultural Research Center, NARO, Shimo-kuriyagawa, Morioka, Iwate, Japan.
Center for Environmental Biology and Ecosystem, National Institute for Environmental Studies, Tsukuba, Ibaraki, Japan.
Environ Entomol. 2019 Apr 3;48(2):426-433. doi: 10.1093/ee/nvz001.
Minute pirate bugs of genus Orius (Wolff) are known important generalist predators of microinvertebrate pests and are therefore useful in many agricultural contexts. Effective sampling methods are thus of great importance to monitor Orius spp. populations. Sticky traps are one such sampling method; however, trap color must be carefully selected for the target insect species. In this study, we examined the most suitable sticky trap color (i.e., white, blue, or yellow) to capture Orius spp. individuals in eggplant Solanum melongena (Linnaeus) (Solanales: Solanaceae), Italian ryegrass Lolium multiflorum (Lamarck) (Poales: Poaceae), soybean Glycine max (Linnaeus) (Fabales: Fabaceae), and white clover Trifolium repens (Linnaeus) (Fabales: Fabaceae) fields. More Orius spp. adults were caught on blue and white traps than on yellow traps. The white traps also caught other insects, which hampered the counting of Orius spp. individuals and, therefore, reduced trapping efficiency. In addition, seasonal prevalence investigations showed that blue sticky traps had similar patterns to those of field observations. Thus, as the blue sticky trap can avoid capturing nontarget insects, we concluded that blue was the most suitable trap color for monitoring Orius spp. In addition, because blue sticky traps are more efficient and less-labor intensive, they can be useful as an alternative to field observations.
小花蝽属（Orius (Wolff)）的小花蝽是已知的重要多食性微小型无脊椎害虫捕食者，因此在许多农业环境中都很有用。有效的抽样方法对于监测小花蝽种群非常重要。粘性诱捕器就是这样一种抽样方法；然而，诱捕器的颜色必须针对目标昆虫物种仔细选择。在本研究中，我们研究了在茄子（茄属茄科茄属（Solanum melongena (Linnaeus)）（茄目：茄科））、意大利黑麦草（黑麦草属多花黑麦草（Lolium multiflorum (Lamarck)）（禾本目：禾本科））、大豆（大豆属大豆（Glycine max (Linnaeus)）（豆目：豆科））和白三叶草（三叶草属白车轴草（Trifolium repens (Linnaeus)）（豆目：豆科））田中捕获小花蝽个体最合适的粘性诱捕器颜色（即白色、蓝色或黄色）。捕获的小花蝽成虫在蓝色和白色诱捕器上比在黄色诱捕器上更多。白色诱捕器还捕获了其他昆虫，这妨碍了小花蝽个体的计数，因此降低了诱捕效率。此外，季节性发生率调查表明，蓝色粘性诱捕器的模式与田间观察相似。因此，由于蓝色粘性诱捕器可以避免捕获非目标昆虫，我们得出结论，蓝色是监测小花蝽最合适的诱捕器颜色。此外，由于蓝色粘性诱捕器更高效且劳动强度较小，它们可以作为田间观察的替代方法。
