Korean journal of applied entomology (한국응용곤충학회지)

Korean Society of Applied Entomology (한국응용곤충학회)
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Release Level of Amblyseius fallacis Garman (Acarina: Phytoseiidae) for Biological Control of Panonychus citri McGregor (Acari: Tetranychidae) on Citrus

귤응애의 생물적 방제를 위한 Amblyseius fallacis의 방사수준

  • 김동환 (제주농업시험장 식물환경과) ;
  • 김광식 (제주농업시험장 식물환경과) ;
  • 현재욱 (제주농업시험장 식물환경과) ;
  • 임한철 (제주농업시험장 식물환경과)
  • Published : 2003.09.01
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Abstract

The effect of density suppression of Amblyseius fallacis (Garman) against Panonychus citri (McGregor) on citrus tree introduced with some different ratio was investigated. When it was introduced with over 16:1 (Panonychus citri: A. fallacis) ratio, Panonychus citri was suppressed very effectively. And in case of introduced once or two times with 20: 1 ratio when the density of Panonychus citri was reached 0.5 and 1.0 per leaf, the density of A. fallacis was formed highly, but the suppression effect against Panonychus citri was not effective. Also, the density changes of P. citri and A. fallacis on the citrus tree released with 10: 1 ratio (P. citri: A. fallacis) when the density of P. citri was reached about 0.1 per leaf in plastic film house were investigated. In case of released twice at the interval of 10 days, the density of A. fallacis was high and P. citri was suppressed so effectively over two month. On the inside of canopy of the citrus tree planted in plastic film house, the air temperature was much lower than on the outside of canopy, while relative humidity was much higher.

항온$.$항습 조건에서 Amblyseius fallacis의 접종밀도별 귤응애에 대한 밀도억제효과를 조사한 결과, 16 : 1(Panonychus citri :A.fallacis) 이상의 비율로 접종한 경우에 귤응애의 밀도가 매우 효과적으로 억제되었다. 그리고 귤응애의 초기 밀도가 잎 당 0.5마리와 1마리일 때 20:1로 1-2회씩 방사한 결과, 모든 처리에서 A.fallacis의 밀도는 다소 높게 형성되었으나 귤응애에 대한 뚜렷한 억제효과를 보이지는 않았다. 정상적으로 관리되고 있는 비닐하우스의 감귤나무에서 귤응애가 잎 당 0.1-0.2마리 정도일 때 10:1로 2회 방사한 경우에는 A.fallacis의 밀도도 높게 형성되었으며, 유기합성농약을 살포한 처리구와 동일할 정도의 높은 방제효과를 보였다. 그리고 이리응애가 서식하는 곳은 수관 내부이므로 수관 내부와 외부의 환경차이를 조사한 결과,주간에는 수관내부가 외부에 비해 기온은 낮고, 상대습도는 높기 때문에 A.fallacis의 서식에 다소 유리한 것으로 나타났으며, 기온은 7.2$^{\circ}C$ 이상, 상대습도는 18.5% 이상까지도 차이가 있었다.

Keywords

References

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