Hao Enhua, Liu Rui, Xu Ruirui, Lu Pengfei, Qiao Haili
The Key Laboratory for Silviculture and Conservation of the Ministry of Education, School of Forestry, Beijing Forestry University, Beijing, 100083, China.
The Key Laboratory for Silviculture and Conservation of the Ministry of Education, School of Forestry, Beijing Forestry University, Beijing, 100083, China.
Arthropod Struct Dev. 2023 Mar;73:101252. doi: 10.1016/j.asd.2023.101252. Epub 2023 Mar 7.
The woodwasp Sirex noctilio Fabricius is a major quarantine pest that was reported in China in 2013 and mostly damages Pinus sylvestris var. mongolica. Reverse chemical ecology, which uses chemical lures to catch or block insects from mating is the classic way to control forestry pests. This indicates that insect sensilla play a crucial role in detecting external chemical and physical stimuli. Nonetheless, the categorization and distribution of sensilla on the antennae and ovipositor of S. noctilio are insufficiently specific. In this paper, scanning electron microscopy (SEM) was used to observe the ultrastructure of the sensilla of S. noctilio on the antenna and ovipositor. It was found that the types and distribution of sensilla on the antennae of S. noctilio male and female are consistent, and six types of sensilla are found: sensilla trichodea (ST), sensilla chaetica (SC), Böhm bristles (BB), sensilla basiconica (SB), sensilla ampullacea (SA), and contact chemoreceptors (CC). Besides, there are five types of sensilla on the female ovipositor. In addition to ST, SC and BB, two more types of sensilla are also found: sensilla cavity (SCa) and sensilla coeloconica (SCo). Through identification of the morphology and distribution of the sensilla, the functions of different sensilla in the mating and host selection mechanisms of S. noctilio are proposed, thereby establishing a foundation for S. noctilio chemical communication research.
木蜂树蜂（Sirex noctilio Fabricius）是一种主要的检疫性害虫，于2013年在中国被发现，主要危害樟子松。逆向化学生态学利用化学引诱剂诱捕或阻止昆虫交配，是防治林业害虫的经典方法。这表明昆虫感器在检测外部化学和物理刺激方面起着至关重要的作用。然而，关于木蜂树蜂触角和产卵器上感器的分类和分布还不够明确。本文利用扫描电子显微镜（SEM）观察了木蜂树蜂触角和产卵器上感器的超微结构。结果发现，木蜂树蜂雌雄触角上感器的类型和分布一致，共发现六种感器：毛形感器（ST）、刺形感器（SC）、Böhm氏鬃毛（BB）、锥形感器（SB）、壶形感器（SA）和接触化学感受器（CC）。此外，雌虫产卵器上有五种感器。除了ST、SC和BB外，还发现了另外两种感器：腔形感器（SCa）和腔锥感器（SCo）。通过对感器形态和分布的鉴定，提出了不同感器在木蜂树蜂交配和寄主选择机制中的功能，从而为木蜂树蜂化学通讯研究奠定了基础。
