Spontaneous Color Preferences and Associative Learning in Protaetia brevitarsis (Coleoptera: Scarabaeidae)

文献类型： 外文期刊

第一作者： Wu, Hui

作者： Wu, Hui;Cui, Zhuangzhi;Huang, Xiaoqing;Dhiloo, Khalid Hussain;Kong, Fanfang;Wang, Zhongyue;Liu, Yongqiang;Dhiloo, Khalid Hussain

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关键词： Protaetia brevitarsis; grape; color preference; spectral characteristics; color learning

期刊名称：INSECTS （ 影响因子：2.9； 五年影响因子：3.3 ）

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年卷期： 2024 年 15 卷 10 期

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收录情况： SCI

摘要： Simple Summary Adult Protaetia brevitarsis (Coleoptera: Scarabaeidae, Lewis) is an omnivorous beetle that damages primarily crops and fruits, especially grapes. The objective of our study was to gain insight into vision and olfaction in P. brevitarsis adults. The results indicated that the adults innately preferred wavelengths in the red spectrum, particularly 730 nm. It is the first report that P. brevitarsis adults had an associative learning ability, which meant they could associate the feeding environment with a food reward. This is of great importance in revealing the feeding preferences of adults and their persistent damage in vineyards. And we also found that vision was not the only factor in foraging decisions; olfactory cues also influenced their decision making. These results contribute to our understanding of the combined role of visual and olfactory cues for host localization and provide a basis for designing effective traps for P. brevitarsis adults.Abstract Color vision, which varies among species, plays an important role in foraging, mating, and habitat selection among insects. Protaetia brevitarsis (Coleoptera: Scarabaeidae, Lewis) is an omnivorous beetle that damages both crops and fruit. Here, to understand the effect of vision and olfaction in host selection, experiments were conducted on the spectral wavelength preference, color preference, and associative learning ability of adult P. brevitarsis using LED lights and grapes. In our experiments, adults showed the strongest spontaneous preference toward the red spectrum, particularly 730 nm. Non-preferred lights were used to train adults with a food reward (grapes). Green-trained adults had an increasing tendency to prefer green light, and blue-trained adults had a clear preference for blue light. Furthermore, adults significantly preferred red grapes in the absence of olfactory cues, but their selectivity for grapes differed in the presence of olfactory cues, indicating that vision was not the only factor in foraging decisions, but that olfactory cues also influenced their decision making. The results lay the groundwork for revealing their host localization mechanism and provide promising avenues for biological control in the field.

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