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Ultrastructure of Antennal Morphology and Sensilla of Teak Skeletonizer, Eutectona machaeralis Walker (Lepidoptera: Crambidae)

Part of: Micrographia Collection

Published online by Cambridge University Press:  14 October 2020

Laijiao Lan Open the ORCID record for Laijiao Lan [Opens in a new window] ,
Shengkun Wang ,
Keyan Hu ,
Tao Ma  and
Xiujun Wen
Laijiao Lan
Affiliation:
Guangdong Key Laboratory for Innovative Development and Utilization of Forest Plant Germplasm, College of Forestry and Landscape Architecture, South China Agricultural University, 483 Wushan Road, Tianhe District, Guangzhou 510642, China
Shengkun Wang
Affiliation:
Research Institute of Tropical Forestry of CAF, Guangzhou 510520, China
Keyan Hu
Affiliation:
Guangdong Key Laboratory for Innovative Development and Utilization of Forest Plant Germplasm, College of Forestry and Landscape Architecture, South China Agricultural University, 483 Wushan Road, Tianhe District, Guangzhou 510642, China
Tao Ma*
Affiliation:
Guangdong Key Laboratory for Innovative Development and Utilization of Forest Plant Germplasm, College of Forestry and Landscape Architecture, South China Agricultural University, 483 Wushan Road, Tianhe District, Guangzhou 510642, China
Xiujun Wen*
Affiliation:
Guangdong Key Laboratory for Innovative Development and Utilization of Forest Plant Germplasm, College of Forestry and Landscape Architecture, South China Agricultural University, 483 Wushan Road, Tianhe District, Guangzhou 510642, China
*
*Authors for correspondence: Tao Ma, Email: [email protected]; Xiujun Wen, Email: [email protected]
*Authors for correspondence: Tao Ma, Email: [email protected]; Xiujun Wen, Email: [email protected]
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Abstract

The leaf skeletonizer, Eutectona machaeralis (Walker) (Lepidoptera: Crambidae), is a severe insect pest of teak trees (Tectona grandis L.f.) in China. To provide some basic evidence for future semiochemical-based management strategies of E. machaeralis, the morphology, ultrastructure, and distribution of antennal sensilla of adults were observed under scanning and transmission electron microscopy. The shape and structure of antenna were similar between males and females, both being filiform. However, the antennal length of males was significantly longer than that of females. Eight morphological sensilla types were observed in both sexes: Böhm's bristles, sensilla trichodea, sensilla basiconica, sensilla chaetica, sensilla styloconica, sensilla coeloconica, sensilla auricillica, and sensilla squamiformia. Significant sexual dimorphism of the sensilla dimensions was found, especially in sensillar length. The putative and potential functions of the different sensilla types are discussed based on the fine structures of the cuticular walls and dendrites of the different sensilla types. We expect these results to help lay a solid foundation for future functional research and develop further investigations of E. machaeralis.

Keywords

chemical communicationolfactionSEMsexual dimorphismTEM
Type
Micrographia
Information
Microscopy and Microanalysis , Volume 26 , Issue 6 , December 2020 , pp. 1274 - 1282
Copyright
Copyright © The Author(s), 2020. Published by Cambridge University Press on behalf of the Microscopy Society of America

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Footnotes

a

L-J. Lan and S-K. Wang contributed equally to this work.

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