Insects (Jun 2022)

Abnormal Antennal Olfactory Sensilla Phenotypes Involved in Olfactory Deficit in <i>Bactrocera correcta</i> (Diptera: Tephritidae)

  • Kai-Fei Guo,
  • Xiao-Mei Peng,
  • Jie-Yu Tu,
  • Chan Jin,
  • Wan-Rong Zhang,
  • Xi-Zhu Chen,
  • Yong-Jun Liu,
  • Hong-Guang Zha,
  • Wei Shi,
  • Jun Cao

DOI
https://doi.org/10.3390/insects13060535
Journal volume & issue
Vol. 13, no. 6
p. 535

Abstract

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The guava fruit fly, Bactrocera correcta, is one of the most destructive pests in the genus Bactrocera and detects environmental odorants mainly through antennal olfactory sensilla phenotypes with nanopores. However, it is unclear whether there are naturally occurring abnormal antennal olfactory sensilla phenotypes that affect olfaction. Here, we found that there were abnormal bulges besides nanopores on the surface of trichoid and basiconic olfactory sensilla in the antennal flagellum of long-term laboratory rearing colony (LTC), and that nanopore number in these olfactory sensilla was also remarkably reduced. Notably, the electroantennogram (EAG) responses of LTC insects to methyl eugenol or β-caryophyllene were inhibited, and their behavioral responses elicited by the same odorants were also impaired. These results revealed naturally occurring abnormal antennal olfactory sensilla phenotypes which were involved in olfactory deficit in B. correcta, providing a platform to further study nanopore-targeted pest control technologies in the future.

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