Selection of Trunk Injection Pesticides for Preventive of Pine Wilt Disease, Bursaphelenchus xylophilus on Japanese Black Pine (Pinus thunbergii)

곰솔(Pinus thunbergii)에서 소나무재선충병 예방을 위한 나무주사용 약제선발

  • Lee, Sang-Myeong (Southern Forest Research Center, Korea Forest Research Institute) ;
  • Kim, Dong-Soo (Southern Forest Research Center, Korea Forest Research Institute) ;
  • Lee, Sang-Gil (Korea Forest Research Institute) ;
  • Park, Nam-Chang (Southern Forest Research Center, Korea Forest Research Institute) ;
  • Lee, Dong-Woon (Department of Applied Biology, Institute of Agricultural Sciences, Kyungpook National University)
  • 이상명 (국립산림과학원 남부산림연구소) ;
  • 김동수 (국립산림과학원 남부산림연구소) ;
  • 이상길 (국립산림과학원) ;
  • 박남창 (국립산림과학원 남부산림연구소) ;
  • 이동운 (경북대학교 생물응용학과)
  • Published : 2009.12.31

Abstract

This study was carried out to select effective preventive pesticides against pine wilt disease caused by pinewood nematode (PWN), Bursaphelenchus xylophilus on trunk injection. 1,000 fold aquatic solution of abamectin 1.8% EC and emamectin benzoate 2.15% EC were lower mortality (7.3% and 8.3% respectively) against PWN on 1 day after treatment. However effects of abamectin 1.8% EC, emamectin benzoate 2.15% EC, fosthiazate 30% SL and fenitrothion 30% SL were inhibited the reproduction of PWN over 99.6% in Botrytis cineria media. Effect of trunk injection of abamectin 1.8% EC and emamectin benzoate 2.15% EC at the rate of $10\;m{\ell}$ per 10 cm in diameter of breast height (DBH) on mortality of Japanese black pine, Pinus thungergii by inoculated PWN was 0% and 3.3%, respectively at the applied year however when injection of fosthiazate 30% SL were treated with the rate of $5\;m{\ell}$ per 10 cm tree DBH, mortality of tree was 63.3%. Abamectin 1.8% EC and emamectin benzoate 2.15% EC was showed high preventive efficacy representing >90% against PWN at the following year. PWN preventing efficacy of trunk injection was lower in naturally occurred area (mortality of pine tree in control was 11.7% at the first year) of PWN than artificially infected site (mortality of pine tree in control was >76.7% at the first year), PWN preventing efficacy of trunk injection of abamectin 1.8% EC and emamectin benzoate 2.15% EC at the rate of $10\;m{\ell}$ per 10 cm in DBH was 91.5% and 82.9%, respectively, at the applied year and 89.5% and 82.6% respectively at the following year in PWN naturally occurred site. Control efficacy by trunk injection of abamectin 1.8% EC and emamectin benzoate 2.15% EC was more higher in 10 fold dilution with 10 fold high amount of aquatic solution than no dilution with 10 fold less amount of aquatic solution. The preventive effect of trunk injection of abamectin 1.8% EC and emamectin benzoate 2.15% EC at the rate of $5\;m{\ell}$ per 10 cm in DBH was showed 100% at the applied year in PWN inoculated tree.

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