Continued range expansion of Drosophila suzukii (Matsumura) (Diptera: Drosophilidae) is exposing new species of soft fruits and berries to potential infestation. Our understanding of cues that drive host-finding and selection in this highly polyphagous pest insect is still incomplete. Fruit firmness influences host choice behaviour by limiting suitability for oviposition and larval development. Other factors such as fruit sweetness and acidity act as cues for fruit ripening. Here we assess the role of these cues and fruit colour on host selection. We demonstrate that the use of objective and nonanthropocentric methods of quantifying colour in studies of colour preference is critical to understanding the cues evoking responses from insects. Acidity but not sweetness increased D. suzukii attraction and larval success. Differences in D. suzukii attraction were most strongly correlated with short-wavelength reflectance (blue, cyan, and green (470–560 nm)). Growers could select for fruit varieties with relatively higher reflectance values upon maturity to reduce susceptibility to D. suzukii.

铃木果蝇（松村）（双翅目：果蝇科）的范围不断扩大，使软果和浆果的新物种受到潜在的侵扰。我们对驱动这种高度多食性害虫昆虫的宿主发现和选择的线索的理解仍然不完整。果实硬度通过限制对产卵和幼虫发育的适应性来影响寄主的选择行为。水果甜度和酸度等其他因素也可以作为水果成熟的线索。在这里，我们评估了这些提示和水果颜色在宿主选择中的作用。我们证明，在颜色偏好研究中使用客观和非人类中心的颜色量化方法对于理解昆虫引起的反应至关重要。酸度而不是甜度增加了铃木D.吸引力和幼虫的成功。在差异D. suzukii吸引力最为强烈用短波长的反射率（蓝色，青色和绿色（470-560纳米））相关。种植者可以选择成熟时反射率值相对较高的水果品种，以减少对铃木D.的敏感性。