Wu Hui, Cui Zhuangzhi, Huang Xiaoqing, Dhiloo Khalid Hussain, Kong Fanfang, Wang Zhongyue, Liu Yongqiang
State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing 100193, China.
Department of Entomology, Faculty of Crop Protection, Sindh Agriculture University, Tandojam 70060, Pakistan.
Insects. 2024 Oct 8;15(10):780. doi: 10.3390/insects15100780.
Color vision, which varies among species, plays an important role in foraging, mating, and habitat selection among insects. (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 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.
色觉在不同物种间存在差异，在昆虫的觅食、交配和栖息地选择中起着重要作用。铜绿丽金龟（鞘翅目：金龟科，刘易斯）是一种杂食性甲虫，会对农作物和果实造成损害。在此，为了解视觉和嗅觉在寄主选择中的作用，利用发光二极管灯和葡萄对成虫的光谱波长偏好、颜色偏好及联想学习能力进行了实验。在我们的实验中，成虫对红色光谱，尤其是730纳米，表现出最强的自发偏好。使用非偏好光并给予食物奖励（葡萄）来训练成虫。接受绿光训练的成虫对绿光的偏好有增加的趋势，接受蓝光训练的成虫对蓝光有明显偏好。此外，在没有嗅觉线索的情况下成虫显著偏好红葡萄，但在有嗅觉线索时它们对葡萄的选择性有所不同，这表明视觉并非觅食决策的唯一因素，嗅觉线索也会影响它们的决策。这些结果为揭示它们的寄主定位机制奠定了基础，并为该领域的生物防治提供了有前景的途径。
