Journal of the Korean Wood Science and Technology

The Korean Society of Wood Science & Technology (한국목재공학회)
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Effect of Proanthocyanidin-rich Extracts from Pinus radiata Bark on Termite Feeding Deterrence

  • Mun, Sung Phil (Department of Wood Science and Technology, Chonbuk National University) ;
  • Nicholas, Darrel D. (Department of Sustainable Bioproducts, Mississippi State University)
  • Received : 2017.07.24
  • Accepted : 2017.08.31
  • Published : 2017.11.25
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Abstract

Antioxidants are known to affect the feeding habits of termites and a good source is pine bark which contains high levels of antioxidants which can be extracted with neutral solvents. In this study procyanidins (PCs)-rich MeOH-extract and a hot-water extract (HWE) were prepared from Pinus radiata bark. HWE was further separated into crude PCs (CPCs), polymeric PCs (PPCs), and low-molecular-weight PCs (LMWPCs) fractions. The MeOH extract and these fractions were examined for termite (Reticulitermes flavipes Kollar) antifeedant activities using a no-choice test. Catechin was used as a positive control. The LMWPCs was found to be the most effective deterrent to termite feeding. The comparative efficiency of the compounds tested were LMWPCs > PPCs > CPCs > MeOH extract, with the latter being more dependent on molecular weight than on its antioxidant activity.

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References

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