《环境昆虫学报》

红脉穗螟Tirathaba rufivena Walker是椰子、槟榔和油棕等棕榈科植物的重要害虫，雌成虫的产卵器及其感器可能在寻找适宜产卵位点过程中发挥重要作用。本研究利用扫描电镜和透射电镜技术对红脉穗螟产卵器的形态及感器进行了观察分析，发现红脉穗螟产卵器是由第8~10腹节特化形成的可套叠伸缩的管状结构。在产卵器上发现了4种刺形感器，刺形感器I和II呈细长毛状，直且坚固，分别分布于肛乳突与第八腹节，长度较长；刺形感器III较刺形感器I和II短，但长度变化较大，内部可见树突结构；刺形感器IV外形粗壮，端部钝圆具孔，主要分布于肛乳突背面外缘。此外产卵器上还有大量微毛分布广泛。本研究有助于进一步探究红脉穗螟产卵行为机制，也为植物源引诱剂和产卵忌避剂等绿色防控技术的开发提供科学依据。

英文摘要:

Tirathaba rufivena Walker is an important pest of palm plants, such as coconut, betel nut, and oil palm. The ovipositor and its sensilla in female adults likely play crucial roles in locating suitable oviposition sites. In this study, we used scanning electron microscopy (SEM) and transmission electron microscopy (TEM) to observe and analyze the morphological structure of the ovipositor and the sensilla on it. The results revealed that the ovipositor of T. rufivena is a telescopic tubular structure formed by the specialization of the 8th to 10th abdominal segments. Four types of sensilla chaetica on the ovipositor were identified. Sensilla chaetica I and II were long, slender, hair-like structures that were straight and robust, located on the anal papillae and the 8th abdominal segment, respectively. Sensilla chaetica III was shorter than I and II, but its length varies significantly, with visible dendritic structures inside. Sensilla chaetica IV was sturdy with blunt, porous tips, mainly distributed on the outer edge of the anal papillae's dorsal surface. Additionally, numerous microtrichia were widely distributed on the ovipositor. This study contributes to the further understanding of the oviposition behavior mechanism of T. rufivena and provides a scientific basis for developing green control methods such as plant-derived attractants and oviposition deterrents.

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