Microstructure of the Attaching Device of Sitophilus oryzae L. (Curculionidae: Coleoptera) | ||
| Egyptian Academic Journal of Biological Sciences, B. Zoology | ||
| Volume 17, Issue 1, June 2025, Pages 27-34 PDF (597.27 K) | ||
| Document Type: Original Article | ||
| DOI: 10.21608/eajbsz.2025.405460 | ||
| Author | ||
| Radwa M. Azmy | ||
| Department of Entomology, Faculty of Science, Ain Shams University | ||
| Abstract | ||
| Many insect species are supplied with specific attachment devices, with different morphological features according to the species and the function of the attachment device. It is observed that the rice weevil, Sitophilus oryzae L. efficiently climb on different types of substrates including vertical smooth surfaces. This weevil has strong attachment force regardless of the type of the substrate roughness. This probably results from the specific complex attachment device found on the tarsi. To understand the extraordinary ability of this weevil, scanning electron microscopy was conducted on the tarsai of the proleg, mesoleg and metaleg to explore the micro-structure of its attachment system that enable the weevil to move effectively even upward on not only the rough surfaces, but also on the smooth surfaces as well. The findings of this research reveal that Sitophilus oryzae weevils attach to rough surfaces using their strong claws. While, they attach to smooth surfaces by means of complex attachment system composed mainly of two groups of fringed attachment pads. These fringed attachment pads consist of tufts of setae projected forwardly with various sizes distributed at the central region of the pad. The attachment system used by Sitophilus oryzae was revealed through study of the tarsal surface using the scanning electron microscopy. This study may provide more declaration of this weevil behaviour and may be used as inspiration model to develop promising efficient climbing robots. | ||
| Keywords | ||
| Climbing behaviour; attachment; smooth surfaces; Scanning; Sitophilus oryzae; bio-inspired robots | ||
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