Journal of the Korean Wood Science and Technology

The Korean Society of Wood Science & Technology (한국목재공학회)
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Ingestion Toxicity of Fipronil on Reticulitermes speratus kyushuensis (Isoptera: Rhinotermitidae) and Its Applicability as A Termite Bait

  • Kim, Si Hyun (Safety and Disaster Prevention Division, National Research Institute of Cultural Heritage) ;
  • Chung, Yong Jae (Department of Heritage Conservation & Restoration, Graduate School of Convergence Cultural Heritage, Korea National University of Cultural Heritage)
  • Received : 2017.01.17
  • Accepted : 2017.02.21
  • Published : 2017.03.25
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Abstract

Historical wooden buildings in Korea are being damaged by Reticulitermes speratus kyushuensis Morimoto, a type of subterranean termite, and the scale of this damage is increasing gradually because of global warming. This study evaluated the ingestion toxicity of the phenylpyrazole insecticide fipronil to R. s. kyushuensis and its applicability as termite bait with the aim of controlling termite colonies more efficiently. An ingestion toxicity assessment was conducted and the $LT_{50}$ was determined to be 4.43 day at concentrations of 10 ppm, indicating a slow-acting effect; therefore, 10 ppm was selected as an appropriate dose. A field applicability assessment was conducted in which the number of foraging workers and the rate at which the termites fed decreased 2 weeks after baiting, and termite colony activity was no longer apparent after 4 weeks demonstrating the efficacy of fipronil at eliminating colonies. Taken together, these results, indicate that low-dose fipronil eliminated R. s. kyushuensis colonies faster than insect growth regulators; therefore, it is expected to be useful when trying to conserve historical wooden buildings.

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References

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