Department of Biology, Acadia University, B4P2R6, Wolfville, NS, Canada.
Department of Biology, Memorial University of Newfoundland and Labrador, A1C5S7, St. John's, NL, Canada.
Sci Rep. 2019 Nov 5;9(1):16051. doi: 10.1038/s41598-019-52425-w.
Drosophila suzukii Matsumura (Diptera: Drosophilidae) is a significant invasive pest in soft-skin fruits and berries in Asia, Europe, and North and South America. Many herbivorous insects use multiple cues for host selection, particularly olfactory and visual stimuli. The visual system of closely-related Drosophila melanogaster is well-documented, expressing strong sensitivity to short-wavelength colors (ultraviolet to green) and only limited sensitivity to long-wavelength colors (red to infrared). Our results suggest that D. suzukii have limited ability to distinguish red consistent with visual sensitivity range within the melanogaster subgroup. We propose that color contrast rather than color appearance may be of greater importance in orientation and attraction. We propose that differences in reflectance between light wavelengths important for color opponency are key to color discrimination to provide color contrast between foreground and background, as occurs between fruit and foliage, during host-finding.
斑翅果蝇（Diptera：Drosophilidae）是亚洲、欧洲、北美和南美的软皮水果和浆果的重要入侵害虫。许多草食性昆虫使用多种线索来选择宿主，特别是嗅觉和视觉刺激。亲缘关系密切的黑腹果蝇的视觉系统已有详细记录，对短波长颜色（紫外线到绿色）表现出强烈的敏感性，而对长波长颜色（红色到红外线）的敏感性有限。我们的结果表明，斑翅果蝇区分红色的能力有限，与黑腹果蝇亚组内的视觉敏感度范围一致。我们提出，颜色对比而不是颜色外观可能在定向和吸引中更为重要。我们提出，在颜色拮抗中重要的光波长之间的反射率差异是颜色区分的关键，以提供前景和背景之间的颜色对比，就像在寻找宿主时水果和树叶之间发生的那样。
