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Morphology, distribution, and abundance of antennal sensilla of male and female macropterous and brachypterous small brown planthopper, Laodelphax striatellus (Fallén) (Hemiptera: Delphacidae)

Authors

  • Bing-Xian Fu,

    1. State Key Laboratory of Rice Biology; Key Laboratory of Agricultural Entomology, Ministry of Agriculture; Institute of Insect Sciences, Zhejiang University, Hangzhou, 310058, China
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  • Glenn Adam Bellis,

    1. Department of Agriculture, Northern Australia Quarantine Strategy, Fisheries and Forestry, GPO Box 3000, Darwin, NT 0801, Australia
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  • Jian Hong,

    1. Center of Analysis and Measurement, Zhejiang University, Hangzhou, 310058, China
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  • Jie-Ru Wang,

    1. Department of Materials Science and Engineering, Zhejiang University, Hangzhou, 310020, China
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  • Qiong Wu,

    1. Department of Plant Protection, Zhejiang University, Hangzhou, 310058, China
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  • Qi-Yi Tang,

    1. Institute of Insect Sciences, Zhejiang University, Hangzhou, 310058, China
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  • Jia-An Cheng,

    1. State Key Laboratory of Rice Biology; Key Laboratory of Agricultural Entomology, Ministry of Agriculture; Institute of Insect Sciences, Zhejiang University, Hangzhou, 310058, China
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  • Zeng-Rong Zhu

    Corresponding author
    1. State Key Laboratory of Rice Biology; Key Laboratory of Agricultural Entomology, Ministry of Agriculture; Institute of Insect Sciences, Zhejiang University, Hangzhou, 310058, China
    2. Department of Plant Protection, Zhejiang University, Hangzhou, 310058, China
    • State Key Laboratory of Rice Biology, Key Laboratory of Agricultural Entomology, Ministry of Agriculture, Institute of Insect Sciences, Zhejiang University, Hangzhou, 310058, China
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Abstract

The antennal sensilla of both genders of macropterous and brachypterous adults of the small brown planthopper, Laodelphax striatellus (Fallén) (Hemiptera: Delphacidae) were examined using light and scanning electron microscopy. Scanning electron microscopy revealed seven types of antennal sensilla in adult L. striatellus which were not evenly distributed on all antennal segments. Sensilla chaetica, a sensillum campaniformium and a Böhm bristle were found on the scape. Sensilla chaetica, sensilla trichodea, sensilla placodea which always present as plaque organs, sensilla basiconica and a sensillum campaniformium were present on the pedicel. Three sensilla basiconica and one sensillum coeloconicum containing two sensory pegs were located on the swollen sensory region of the basal flagellum. Pores observed on the surface of s. trichodea and s. placodea suggest these organs probably play a role in olfaction, whereas the aporous s. chaetica with flexible sockets probably function as mechanoreceptors. The aporous s. basiconica with inflexible sockets are probable to be thermo-hygroreceptors while the Böhm bristle and s. campaniformia may act as antennal proprioceptors. The function of s. coeloconicum remains uncertain. The numerical dominance of antennal olfactory receptors suggests olfaction is an important function of the antenna in L. striatellus. Although a small degree of sexual/wing dimorphism was observed in the numbers of sensilla and in the length and width of antennae and antennal segments, the basic shape and structure of the antennae and antennal sensilla did not differ between the gender or wing form in L. striatellus. Microsc. Res. Tech. 2012. © 2012 Wiley Periodicals, Inc.

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