Phototaxis of the summer migrant Kaburagia rhusicola Takagi

Author of the article:ZHA YuPing；ZHANG ZiYi；CHEN JingYuan；YUE JianGen；WU Bo；SONG DeYing

Author's Workplace：1. Hubei Academy of Forestry, Wuhan 430075, China; 2. Zhushan County Forestry Bureau, Zhushan 442200, China; 3. Wufeng County Forestry Bureau, Wufeng 4434003, China

Key Words：Kaburagia rhusicola Takagi; spectra; phototaxis; LED

Abstract：[Objectives]  To investigate the phototaxis of Kaburagia rhusicola Takagi adults to different light wavelengths, and the effects of phototaxis on collection efficiency, in order to develop a special collection device for these aphids. [Methods] The phototaxis of K. rhusicola to 21 monochromatic lights from 325-770 nm was measured in a laboratory and differences in the number of aphids trapped by 4 different types of light were analyzed. [Results]  Every monochromatic light (325-770 nm, 15 lx) induced phototactic responses. Summer migrants significantly preferred red light (670 nm) to all other wavelengths except 460 nm (P< 0.01). In addition to 670 nm, three other light wavelengths; 460, 610, and 590 nm, were also significantly preferred to the other wavelengths (P < 0.05). The relative attractiveness of four different light wavelengths in mobile collection devices specially designed for collecting the summer migrants was tested over three days. There were large differences in the capture-time curves of the 4 wavelengths. The curves of the orange LED light (600- 610 nm), the red LED light (655-665 nm) and the white fluorescent light were all “convex” shapes. However, that of the blue LED light (450-460 nm) was “concave”. [Conclusion]  Summer migrants are most attracted to 670, 460, 610 and 590 nm monochromatic lights. The combination of a movable collecting device and an LED light source can improve the collection efficiency of summer migrants.