Korean Journal of Organic Agriculture (한국유기농업학회지)

Korean Association of Organic Agriculture (한국유기농업학회)
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Acaricidal Activity of Individual and Combined treatments of Plant Extracts against the Tea Red Spider Mite, Tetranychus kanzawai (Acari : Tetranychidae), a Pest of Tea Plant

차나무를 가해하는 차응애에 대한 식물추출물 단독 및 혼합처리의 살비 효과

  • 강충수 (순천대학교 식물의학과) ;
  • 국용인 (순천대학교 한약자원개발학과) ;
  • 김상수 (순천대학교 식물의학과)
  • Received : 2018.10.04
  • Accepted : 2018.11.08
  • Published : 2018.11.30
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Abstract

The acaricidal activity of extracts of Gleditsia japonica var. koraiensis, Camellia sinensis, Cinnamomum cassia, Lantana camara and their mixtures against the tea red spider mite, Tetranychus kanzawai was evaluated. Treatments with mixtures 3 and 1 were effective against the adult females of T. kanzawai and yielded 82.0% and 77.3% adulticidal activities at 7 days after treatment, respectively. Treatment with mixture 2 revealed 68.0% adulticidal activity. Generally, the acaricidal activity of the single treatment of each plant extract was lower than the mixtures. The adult females of T. kanzawai treated with mixtures 3 and 1 produced only 24.0~29.6% as many eggs as control females did. The residue of the plant extracts tested had low adulticidal activity (16.7~31.3% at 7 days after treatment). All the plant extracts tested exhibited no remarkable toxic effect to the eggs of T. kanzawai. Treatments of mixtures 3 and 1 were effective against nymphs of T. kanzawai and led to emergence rates of 16.7 and 22.0%, respectively. These results suggest that mixtures 3 and 1 might be used for the control of T. kanzawai in tea fields.

주엽, 차나무, 계피, 란타나 등의 추출물과 이들의 혼합물들을 대상으로 차응애에 대한 살비효과를 검정하였다. 차응애에 대한 혼합액 3, 1 등의 처리 7일 후에 각각 82.0과 77.3%의 살성충 효과를 나타내었으며, 혼합액 2의 처리에서는 68.0%의 살성충 효과를 보였다. 전반적으로 식물추출물들의 단독처리에서는 혼합처리보다 낮은 살비 효과를 보였다. 혼합액 3, 1 등의 처리에서 차응애 암컷성충의 산란수는 무처리 대비 24.0~29.6%에 그쳤다. 식물추출물들의 잔효성분은 전반적으로 저조한 살성충 효과를 나타내었다(처리 7일 후 16.7~31.3%). 실험 식물추출물들의 차응애 난에 대한 살란효과는 거의 없었다. 혼합액 3, 1 등은 차응애 약충에 대한 효과가 우수하여 각각 16.7%와 22.0%의 낮은 성충 우화율을 나타내었다. 이와 같은 실험결과들로 보아 혼합액 3, 1 등은 차나무 재배지에서 차응애의 방제제로 사용 가능성이 있는 것으로 생각된다.

Keywords

References

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