Evaluation of Toxicity of Plant Extract Made by Neem and Matrine against Main Pests and Natural Enemies

멀구슬과 고삼을 원료로 한 식물추출물의 주요해충과 천적에 대한 독성평가

  • Hwang, In-Cheon (Central Research Institute, KyungNong Co. Ltd.) ;
  • Kim, Jin (Central Research Institute, KyungNong Co. Ltd.) ;
  • Kim, Hyeong-Min (Central Research Institute, KyungNong Co. Ltd.) ;
  • Kim, Do-Ik (Jeonnam Agricultural Research & Extension Services) ;
  • Kim, Sun-Gon (Jeonnam Agricultural Research & Extension Services) ;
  • Kim, Sang-Su (Division of Horticulture and Plant Medicine, Sunchon National University) ;
  • Jang, Cheol (Central Research Institute, KyungNong Co. Ltd.)
  • 황인천 ((주)경농 중앙연구소) ;
  • 김진 ((주)경농 중앙연구소) ;
  • 김형민 ((주)경농 중앙연구소) ;
  • 김도익 (전라남도농업기술원 친환경연구소) ;
  • 김선곤 (전라남도농업기술원 친환경연구소) ;
  • 김상수 (순천대학교 원예식물의학부) ;
  • 장철 ((주)경농 중앙연구소)
  • Published : 2009.03.30


KNI3126 which is the eco-friendly material made by plant extracts - neem and matrine - have been evaluated for efficacies against 6 main pests and toxicity on natural enemies. Insecticidal efficacies of KNI3126 against plant hopper were above 95% at 5 days after treatment (DAT), whereas pesticidal effects against the cotton aphid were above 95% at 3 DAT and slightly decreased at 5 DAT. Insecticidal efficacy against the palm thrips resulted in lower control value as 68.1% than that of chemical insecticides. KNI3126 showed more than 95% control value against diamond back moth, suggesting that it could suppress the population of pest hard to control as eco-friendly material. Mortalities against two-spotted spider mite were about 80% at 1 DAT and over 90% at 5 DAT, respectively. For evaluation of the toxicity on natural enemies, effect against predatory natural enemy was classified as moderate selective toxicity based on the criterion of International Organization of Bio-Control (IOBC), whereas against parasitic natural enemies was found to be relatively safe. Repellent effect was weak against plant hopper, but strong against two-spotted spider mite. In the toxicity test for safety, KNI3126 was classified as the lowest level at acute oral, acute dermal and fish toxicity test and did not induce the irritancy at skin irritation test and eye irritation test.


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