Shi Longqing, Vasseur Liette, Huang Huoshui, Zeng Zhaohua, Hu Guiping, Liu Xin, You Minsheng
Institute of Applied Ecology and Research Centre for Biodiversity and Eco-Safety, Fujian Agriculture and Forestry University, Fuzhou, China.
Fujian-Taiwan Joint Innovation Centre for Ecological Control of Crop Pests, Fujian Agriculture and Forestry University, Fuzhou, China.
PLoS One. 2017 Jan 19;12(1):e0168439. doi: 10.1371/journal.pone.0168439. eCollection 2017.
Insect behaviors are often influenced by light conditions including photoperiod, light intensity, and wavelength. Understanding pest insect responses to changing light conditions may help with developing alternative strategies for pest control. Little is known about the behavioral responses of leafhoppers (Hemiptera: Cicadellidae) to light conditions. The behavior of the tea green leafhopper, Empoasca onukii Matsuda, was examined when exposed to different light photoperiods or wavelengths. Observations included the frequency of locomotion and cleaning activities, and the duration of time spent searching. The results suggested that under normal photoperiod both female and male adults were generally more active in darkness (i.e., at night) than in light. In continuous darkness (DD), the locomotion and cleaning events in Period 1 (7:00-19:00) were significantly increased, when compared to the leafhoppers under normal photoperiod (LD). Leafhoppers, especially females, changed their behavioral patterns to a two day cycle under DD. Under continuous illumination (continuous quartz lamp light, yellow light at night, and green light at night), the activities of locomotion, cleaning, and searching were significantly suppressed during the night (19:00-7:00) and locomotion activities of both females and males were significantly increased during the day (7:00-19:00), suggesting a shift in circadian rhythm. Our work suggests that changes in light conditions, including photoperiod and wavelength, can influence behavioral activities of leafhoppers, potentially affecting other life history traits such as reproduction and development, and may serve as a method for leafhopper behavioral control.
昆虫行为常受光照条件影响，包括光周期、光强度和波长。了解害虫对光照条件变化的反应可能有助于制定替代害虫防治策略。关于叶蝉（半翅目：叶蝉科）对光照条件的行为反应知之甚少。研究了茶小绿叶蝉（Empoasca onukii Matsuda）在不同光照光周期或波长下的行为。观察内容包括活动频率和清洁活动，以及搜索所花费的时间。结果表明，在正常光周期下，雌雄成虫通常在黑暗中（即夜间）比在光照下更活跃。与正常光周期（LD）下的叶蝉相比，在持续黑暗（DD）中，第1阶段（7:00 - 19:00）的活动和清洁事件显著增加。叶蝉，尤其是雌性叶蝉，在DD条件下将其行为模式转变为两天周期。在持续光照下（持续石英灯光照、夜间黄灯照射和夜间绿灯照射），夜间（19:00 - 7:00）的活动、清洁和搜索活动受到显著抑制，而雌雄成虫的活动在白天（7:00 - 19:00）显著增加，这表明昼夜节律发生了变化。我们的研究表明，包括光周期和波长在内的光照条件变化会影响叶蝉的行为活动，可能会影响其他生活史特征，如繁殖和发育，并且可能作为叶蝉行为控制的一种方法。
