Korean Journal of Organic Agriculture (한국유기농업학회지)

Korean Association of Organic Agriculture (한국유기농업학회)
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Susceptibility of Tetranychus urticae and the Predatory Mite, Phytoseiulus persimilis, (Acari: Tetranychidae, Phytoseiidae) to Plant Extracts

식물추출물에 대한 점박이응애와 포식성 천적 칠레이리응애의 감수성

  • 국용인 (순천대학교 한약자원개발학과) ;
  • 현규환 (순천대학교 한약자원개발학과) ;
  • 김상수 (순천대학교 식물의학과)
  • Received : 2015.11.23
  • Accepted : 2015.11.27
  • Published : 2015.12.31
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Abstract

The susceptibility of the twospotted spider mite, Tetranychus urticae and the predatory mite, Phytoseiulus persimilis to extracts of Melia azedarach, Piper nigrum, Syringa velutina and their mixtures was evaluated in laboratory bioassays. Treatments of mixture 1 and 2 were effective against adult females of T. urticae and yielded 73.3 and 70.7% adulticidal activity at 7 days after treatment, respectively. Treatment of mixture 3 revealed 62.7% adulticidal activity. However, M. azedarach, P. nigrum and S. velutina had lower adulticidal activity than the other treatments. Adult females of T. urticae treated with mixture 1 and 2 produced only 11.1-16.7% as many eggs as control females did. All the plant extracts tested were ineffective to against the eggs of T. urticae. Plant extracts tested had little effect on the survival of P. persimilis adult females. Moreover, reproduction of P. persimilis adult females and eclosion of eggs deposited by treated predators were not seriously affected. Treatment of plant extracts tested showed no toxic effect on P. persimilis eggs and produced 100% hatchability. These results suggest that mixture 1 and 2 might be used for the control of T. urticae, and expected to be promising candidates for use in integrated mite management program with P. persimilis.

점박이응애와 포식성 천적 칠레이리응애의 멀구슬, 후추, 정향과 이들의 혼합물에 대한 감수성을 검정하였다. 점박이응애에 대한 혼합액 1, 2 등의 처리 7일 후에 각각 73.7과 70.7%의 살성충 효과를 나타내었으며, 혼합액 3의 처리에서는 62.7%의 살성충 효과를 보였다. 그러나 멀구슬, 후추와 정향처리에서는 다른 처리에서 보다 낮은 살성충 효과를 보였다. 혼합액 1, 2 등의 처리에서 점박이응애 암컷성충의 산란수는 무처리 대비 11.1-16.7%에 불과하였다. 실험 식물추출물들은 모두 점박이응애 난에 대한 살란효과가 없었다. 식물추출물들은 모두 칠레이리응애의 암컷성충에 저독성을 나타냈으며, 암컷성충의 산란수와 산란된 난들의 부화에 큰 영향이 없었다. 모든 식물추출물들의 처리에서 칠레이리응애 난들은 100% 부화하였다. 이와 같은 실험결과들로 보아 혼합액 1, 2 등은 점박이응애의 방제약제로 사용 가능성이 있으며, 점박이응애의 종합관리체계에서 칠레이리응애와 함께 활용할 수 있을 것으로 기대된다.

Keywords

References

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