数字农科院2.0

Visual acuity of Empoasca onukii (Hemiptera, Cicadellidae)

文献类型： 外文期刊

作者： Chang Tan;Xiaoming Cai;Zongxiu Luo;Zhaoqun Li;Chunli Xiu;Zongmao Chen;Lei Bian

作者机构：

关键词： compound eye;Empoasca onukii;structure;visual ability;visual acuity

期刊名称： Insects

ISSN： 2075-4450

年卷期： 2023 年 14 卷 4 期

页码：

收录情况： SCIE（2023版）

摘要： Empoasca onukii is a common tea plant pest with a preference for the color yellow. Past work has shown that host leaf color is a key cue for habitat location for E. onukii. Before studying the effect of foliage shape, size, or texture on habitat localization, it is necessary to determine the visual acuity and effective viewing distance of E. onukii. In this study, a combination of 3D microscopy and X-ray microtomography showed that visual acuity did not significantly differ between females and males, but there were significant differences in the visual acuity and optical sensitivity among five regions of E. onukii’s compound eyes. The dorsal ommatidia had the highest visual acuity at 0.28 cycles per degree (cpd) but the lowest optical sensitivity (0.02 μm2sr), which indicated a trade-off between visual resolution and optical sensitivity for E. onukii. The visual acuity determined from the behavioral experiment was 0.14 cpd; E. onukii exhibited low-resolution vision and could only distinguish the units in a yellow/red pattern within 30 cm. Therefore, visual acuity contributes to the limited ability of E. onukii to distinguish the visual details of a distant target, which might be perceived as a lump of blurred color of intermediate brightness.

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