微光环境下草地贪夜蛾的颜色视觉行为反应

夜出型昆虫与日出型昆虫一样, 具有强大的颜色视觉能力。为明确微光环境下草地贪夜蛾的颜色视觉行为反应, 本研究利用颜色卡纸测试了草地贪夜蛾对紫色、蓝色、绿色、黄色和红色等5种颜色的趋向、取食和产卵选择的偏好性。结果表明, 趋向测试中, 草地贪夜蛾雌雄成虫对蓝色(21.43%和18.57%)和紫色(17.13%和15.70%)表现出明显的趋性, 显著高于绿色、黄色和红色; 取食测试中, 其成虫对不同颜色的选择率无明显差异; 产卵选择则明显偏好黄色(40.27%)和绿色(40.17%)。本研究在理论上丰富了昆虫微光视觉生态学理论, 也为深入研究草地贪夜蛾颜色视觉行为机理提供了基础, 应用上为利用颜色视觉研发草地贪夜蛾物理防控措施提供了科学依据。

Color visual behavior response of Spodoptera frugiperda under dim-light context

Nocturnal insects have the same strong color visual discrimination ability as diurnal insects. In order to clarify the dim-light color visual behavior response of Spodoptera frugiperda, the preference of S.frugiperda adults to purple, blue, green, yellow and red in taxis, feeding and oviposition selection was tested in the laboratory with five kinds of colored cardboard. The results showed that the male and female adults of S.frugiperda showed obvious taxis to blue (21.43% and 18.57%) and purple (17.13% and 15.70%), which was significantly higher than that of green, yellow and red. In the feeding test, it was found that the adults had no obvious preference. The female adults obviously preferred yellow (40.27%) and green (40.17%) to lay their eggs. The above results not only enrich the theory of insect dim-light vision ecology in theory, but also provide a certain behavioral basis for further study on the color vision mechanism of S.frugiperda and scientific basis for the physical prevention and control of S.frugiperda using insect color vision in application.