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Open AccessArticle

Analysis of Pole-Ascending–Descending Action by Insects Subjected to High Voltage Electric Fields

1
Faculty of Agriculture, Kindai University, Nara 631-8505, Japan
2
Plant Center, Institute of Advanced Technology, Kindai University, Wakayama 642-0017, Japan
3
Pharmaceutical Research and Technology Institute, Kindai University, Osaka 577-8502, Japan
4
Anti-Aging Centers, Kindai University, Osaka 577-8502, Japan
5
Research Association of Electric Field Screen Supporters, Nara 631-8505, Japan
*
Author to whom correspondence should be addressed.
Insects 2020, 11(3), 187; https://doi.org/10.3390/insects11030187
Received: 29 January 2020 / Revised: 6 March 2020 / Accepted: 10 March 2020 / Published: 16 March 2020
The present study was conducted to establish an electrostatic-based experimental system to enable new investigations of insect behavior. The instrument consists of an insulated conducting copper ring (ICR) linked to a direct current voltage generator to supply a negative charge to an ICR and a grounded aluminum pole (AP) passed vertically through the center of the horizontal ICR. An electric field was formed between the ICR and the AP. Rice weevil (Sitophilus oryzae) was selected as a model insect due to its habit of climbing erect poles. The electric field produced a force that could be imposed on the insect. In fact, the negative electricity (free electrons) was forced out of the insect to polarize its body positively. Eventually, the insect was attracted to the oppositely charged ICR. The force became weaker on the lower regions of the pole; the insects sensed the weaker force with their antennae, quickly stopped climbing, and retraced their steps. These behaviors led to a pole-ascending–descending action by the insect, which was highly reproducible and precisely corresponded to the changed expansion of the electric field. Other pole-climbing insects including the cigarette beetle (Lasioderma serricorne), which was shown to adopt the same behavior. View Full-Text
Keywords: rice weevil; cigarette beetle; avoidance behavior; electric field rice weevil; cigarette beetle; avoidance behavior; electric field
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Matsuda, Y.; Takikawa, Y.; Kakutani, K.; Nonomura, T.; Toyoda, H. Analysis of Pole-Ascending–Descending Action by Insects Subjected to High Voltage Electric Fields. Insects 2020, 11, 187.

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