Ultrastructure of antennal sensilla of three fruit borers (Lepidoptera: Crambidae or Tortricidae)

Abstract

Three fruit borers Conogethes punctiferalis (Guenée) (Crambidae), Grapholita molesta Busck (Tortricidae), and Spilonota albicana Motschulsky (Tortricidae) are serious pests of fruit trees. In this study, their antennal morphology, types of sensilla, and distributions were observed by using SEM (Scanning Electron Microscope). Nine types of sensilla were found on the antennae of C. punctiferalis, while eight types of sensilla were presented on each of G. molesta and S. albicana. The sensilla trichodea with two subtypes were the most abundant sensilla among three fruit borers. Two subtypes of sensillum coeloconica (type I with spines and type II without spines) were observed on the antennae of C. punctiferalis and G. molesta. However, sensilla coeloconica (type I) were only found in S. albicana. Although the sensilla campaniformia were only found on the antennae of C. punctiferalis, our observations confirm sensilla campaniformia presence in the moths. In addition, the functions of these sensilla were discussed based on previously reported lepidopteran insects. As a result, our study may provide useful information for advanced electrophysiological and behavioral experiments to better understand the mechanisms related to pests control.

Ultrastructure of antennal sensilla of Erannis ankeraria Staudinger (Lepidoptera: Geometridae)

“…SS have been widely reported among Lepidoptera, like Agrotis ipsilon Hufnagel, 1766, Plodia interpunctella Hübner, 1813, and Conogethes punctiferalis Guenée, 1854 (Li, Liu, Du, Li, & Wu, ; Ndomo‐Moualeu, Ulrichs, Radek, & Adler, ; Yang et al, ). In this study, SS were observed on antennae of both sexes, covered by scales.…”

Morphometrics and distribution of antennal sensillae of both sexes of Spodoptera frugiperda (Smith) (Lepidoptera: Noctuidae)

“…Three types of trichoid sensilla were reported to be present in both male and female S. exigua and S. ornithogalli (Jefferson et al, 1970). Sensilla trichoidea is primarily associated with sex pheromone perception (Shneider,1964 andSteinbrecht, 1995) and is sensitive to plant volatiles in female Heliothis virescens (Hillier et al, 2006) and S. litura (Zhang et al, 2013).In fruit borers, Conogethes punctiferalis, Grapholita molesta, and Spilonota albicana, they are involved in the perception of both host plant volatiles and sex pheromones (Li et al, 2018). Sensilla chaetica (SCh) are straight sensillae with a wider base, curved apex and truncated tip.…”

The Antennal Sensilla and Expression Patterns of Olfactory Genes in the Lower TermiteReticulitermes aculabialis(Isoptera: Rhinotermitidae)

“…As workers and soldiers are blind, they obtain environmental information using antennal sensilla ( Yanagawa et al 2009 ). Antennae are the major sensory and olfactory organs that process a wide range of sensilla types for the treatment of chemical signals, which allow them to survive in different environments ( Bawin et al 2017 , Li et al 2018 , Silva et al 2019 ). The antennal sensilla may play a role in nestmate recognition in workers and soldiers ( Huang et al 2012 ).To perform specialized social interactions, every individual needs chemical communication, which requires a special chemosensory system in the division of labor.…”