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Nematicidal Activity of Eclipta prostrata Extract and Terthiophene against Pine Wood Nematode, Bursaphelenchus xylophilus

한련초(Eclipta prostrata) 추출물과 terthiophene의 소나무재선충(Bursaphelenchus xylophilus)에 대한 살선충 효과

  • Received : 2016.02.15
  • Accepted : 2016.03.10
  • Published : 2016.03.31

Abstract

Pine wood nematode, Bursaphlenchus xylophilus is a fatal damaging pest, infecting pinewood trees and is one of the serious forest pest in Korea. Trunk injection is one of the most effective method to protect the live pine trees from nematode infection. The aim of this research was to reveal the efficacy of the nematicidal materials from 46 Kyrgyzstan, 88 Vietnam plant materials and 21 active materials (${\alpha}$-terpinene, ${\alpha}$-pinene, ${\beta}$-thujaplicin, cinnamaldehyde, eugenol, emodin, geraniol, limonone, methyl palmitate, matrine, myrcene, methyl gallate, nicotine, quassin, resveratrol, rotenone, thymol, thujaplicin, terthiophene, tuberstemonine, ${\gamma}$-terpinene) isolated from plants for using as trunk injection agents. Eclipta prostrata extract was highly effective against pine wood nematode in plant extracts and terthiophene has the best nematicidal activity from active materials isolated from plants. Foliar spray of terthiophene on Japanese black pine (Pinus thunbergii) tree reduced proliferation of inoculated pine wood nematode at 22 days after treatment, however no efficacy was found over 22 days. Eclipta prostrata extract and terthiophene can be used as nematicide for further nematicidal efficacy test against any other plant parasitic nematodes and trunk injection efficacy against pine wood nematode.

소나무재선충은 소나무류에 기생하여 치명적 피해를 입히는 선충으로 우리나라의 주요 산림해충의 하나이다. 살아있는 나무에서 소나무재선충을 대상으로 하는 방제법은 나무주사 방법이 가장 실효적인 방법의 하나이다. 본 연구는 소나무재선충의 나무주사 용도로 활용할 수 있는 물질을 탐색하기 위하여 46종의 키르기즈스탄과 88종의 베트남 식물체 및 21종의 식물유래 활성물질(${\alpha}$-terpinene, ${\alpha}$-pinene, ${\beta}$-thujaplicin, cinnamaldehyde, eugenol, emodin, geraniol, limonone, methyl palmitate, matrine, myrcene, methyl gallate, nicotine, quassin, resveratrol, rotenone, thymol, thujaplicin, terthiophene, tuberstemonine, ${\gamma}$-terpinene) 들을 이용하여 소나무재선충에 대한 살선충 활성을 검정하였다. 식물체 추출물들 중에서는 베트남에서 구입한 한련초(Eclipta prostrata) 추출물의 소나무재선충에 대한 살선충 활성이 높았으며 식물체 유래 활성물질들 중에는 terthiophene의 살선충 활성이 가장 높았다. Terthiophene의 곰솔 수간 살포는 22일차까지는 소나무재선충의 증식억제 효과가 있었으나 이후에는 효과가 없었다. 한련초 추출물과 terthiophene의 나무주사 효과와 다른 식물기생성선충에 대한 보완적인 연구가 수행된다면 살선충제로의 활용성도 기대된다.

Keywords

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