Morphological characterization and distribution of antennal sensilla of Spodoptera frugiperda (Lepidoptera: Noctuidae) using scanning electron microscopy

• Published in: Microscopy research and technique 2024-12, Vol.87 (12), p.2989-3002
• Main Authors: Li, Yong‐Ping, Zhou, Hai‐Yan, Yang, Yang, Ye, Hui, Haack, Robert A., Cao, Jun
• Format: Article
• Language: English
• Subjects: Animals; Antennal sensilla; Arthropod Antennae - ultrastructure; Attractants; Bristles; Chemical damage; China; Crop production; Descriptions; Electric potential; Electron microscopes; Emissions; Female; Field emission; Lepidoptera; Male; Microscopy, Electron, Scanning; Morphology; Noctuidae; Odor control; Scanning electron microscopy; Sensilla - ultrastructure; sensilla morphological characteristics; Spodoptera - ultrastructure; Spodoptera frugiperda; Voltage
• ISSN: 1059-910X; 1097-0029; 1097-0029
• DOI: 10.1002/jemt.24644

The fall armyworm (FAW), Spodoptera frugiperda (J. E. Smith) (Lepidoptera: Noctuidae), is a globally significant agricultural pest, causing severe damage to corn production in China. Chemical odor‐based trapping is a major approach for FAW control, making it essential to understand the FAW antennal sensillum types to enhance development of effective chemical odor attractants. In this study, we comprehensively examined the antennal sensilla types of FAW, identifying eight types and two subtypes, including Böhm's bristles, sensilla trichoidea, sensilla chaetica (I and II), sensilla coeloconica, sensilla styloconica, sensilla squamiformia (I and II), sensilla auricillica, and sensilla basiconica. Sensilla chaetica II, and sensilla squamiformia II are reported for the first time for FAW in this study. Detailed low‐voltage field emission scanning electron microscope (LVSEM) images and descriptions are provided for each sensillum type. This study provides the morphological information to aid in conducting antennal sensillum neurophysiological tests on FAW. Research Highlights The types of sensilla of fall armyworm were examined, identifying eight types and two subtypes, including Böhm's bristles, sensilla trichoidea, sensilla chaetica (I and II), sensilla coeloconica, sensilla styloconica, sensilla squamiformia (I and II), sensilla auricillica, and sensilla basiconica. Detailed low‐voltage field emission scanning electron microscope images and descriptions were provided for each sensillum type. In this study, we comprehensively examined the antennal sensilla types of fall armyworm, identifying eight types and two subtypes. Sensilla chaetica II, and sensilla squamiformia II are reported for the first time for FAW. Detailed scanning electron microscope images and descriptions are provided for each sensillum type.