Zhang Jifeng, Wang Baode, Wang Rong, Peng Xiancheng, Li Junnan, Xu Changchun, Cui Yonghong, Liu Mengxia, Zhang Feiping
Forestry College, Fujian Agriculture and Forestry University, Fuzhou 350002, China.
US Department of Agriculture, Animal and Plant Health Inspection Service, S&T, Forest Pest Methods Laboratory, Buzzards Bay, MA 02542, USA.
Insects. 2025 Mar 24;16(4):338. doi: 10.3390/insects16040338.
Swinhoe (Lepidoptera: Erebidae) is considered a potentially internationally invasive forest pest with limited knowledge about its phototactic behavior. This study investigated the phototaxis of males and females using various insecticidal lamps in the field. The results showed that all lamps attracted both males and females, but females were captured in a very low numbers, with a female-to-male ratio of 1:322. The insecticidal lamp with a peak wavelength of 363 nm was most effective for male trapping. Males exhibited a distinct light-trapping rhythm, peaking around midnight (23:00-0:00), with 29.5% capture, while females were most active at dusk (19:00-20:00), with 44.4% capture. Light-trapped females were smaller and lighter than indoor-emerged females and had lower egg-carrying capacity. Females, when laying eggs, did not exhibit phototactic behavior. Only 14.6% of non-ovipositing females showed phototactic behavior, and only 0.6% flew directly toward the lamp. These findings suggest that while non-ovipositing females can exhibit phototaxis, only a small proportion will, potentially reducing the risk of long-distance dispersal of via ocean-going freighters. The results showed that the non-ovipositing females could fly under phototaxis, but their phototaxis was limited. This study provides a basis for the risk assessment of the long-distance dispersal of via ocean-going freighters through female moth phototactic flight.
波纹杂夜蛾（鳞翅目：夜蛾科）被认为是一种具有潜在国际入侵性的森林害虫，但其趋光行为的相关知识有限。本研究在野外使用各种杀虫灯对其雌雄成虫的趋光性进行了调查。结果表明，所有灯都能吸引雌雄成虫，但捕获的雌虫数量极少，雌雄比例为1:322。峰值波长为363 nm的杀虫灯对诱捕雄虫最为有效。雄虫表现出明显的趋光节律，在午夜（23:00 - 0:00）左右达到峰值，捕获率为29.5%，而雌虫在黄昏（19:00 - 20:00）最为活跃，捕获率为44.4%。趋光捕获的雌虫比室内羽化的雌虫体型更小、体重更轻，且怀卵量更低。雌虫在产卵时不表现出趋光行为。只有14.6%的未产卵雌虫表现出趋光行为，且只有0.6%直接飞向灯光。这些发现表明，虽然未产卵雌虫能够表现出趋光性，但只有一小部分会如此，这可能降低了其通过远洋货轮进行远距离扩散的风险。结果表明，未产卵雌虫在趋光作用下能够飞行，但其趋光性有限。本研究为通过雌蛾趋光飞行对其通过远洋货轮进行远距离扩散的风险评估提供了依据。
