Species Dominance of Tetranychus urticae and Panonychus ulmi (Acari: Tetranychidae) in Apple Orchards in the Southern part of Korea

남부지역 사과원내 점박이응애와 사과응애의 우점변화

  • Choi, Kyung-Hee (Apple Research Station, National Institute of Horticultural & Herbal Science, Rural Development Administration) ;
  • Lee, Dong-Hyuk (Apple Research Station, National Institute of Horticultural & Herbal Science, Rural Development Administration) ;
  • Lee, Soon-Won (Korean Fruit Pest Forecasting Research Center) ;
  • Yoon, Changmann (Apple Research Station, National Institute of Horticultural & Herbal Science, Rural Development Administration) ;
  • Lee, Sun-Young (Apple Research Station, National Institute of Horticultural & Herbal Science, Rural Development Administration) ;
  • Do, Yun-Su (Apple Research Station, National Institute of Horticultural & Herbal Science, Rural Development Administration)
  • 최경희 (국립원예특작과학원 사과시험장) ;
  • 이동혁 (국립원예특작과학원 사과시험장) ;
  • 이순원 (한국과수병해충예찰센터) ;
  • 윤창만 (국립원예특작과학원 사과시험장) ;
  • 이선영 (국립원예특작과학원 사과시험장) ;
  • 도윤수 (국립원예특작과학원 사과시험장)
  • Received : 2014.06.20
  • Accepted : 2014.11.06
  • Published : 2014.12.01


This study investigated population fluctuations in two mite species in apple orchards over 20-year period. The occurrence of two major mite pests infesting apple trees, two-spotted spider mite Tetranychus urticae and European red mite Panonychus ulmi (Acari: Tetranychidae), was investigated from 1992 to 2011 in major apple-producing districts, including four to eight cities, in the southern part of the Republic of Korea. The 20-year trend revealed that more orchards were infested by T. urticae from 1992 to 1999, but thereafter P. ulmi became dominant. The observed mean density of P. ulmi was consistent, whereas that of T. urticae fluctuated during this period. The analysis of occurrence in four time periods reveals that the density of T. urticae decreased after 2002. The monthly sampling, revealed that the density of P. ulmi was higher in April, whereas the density of T. urticae was higher from May to August. This change may be due to a change in the frequency of pesticide spraying, ground vegetation management, a decrease in nitrogen fertilization, and the overall orchard management practices. However, this projection should be examined in more detail. On the basis of the findings of this study, it can be concluded that cultural practices, including fertilization, and environmental changes, such as pesticide spray frequency and integrated pest management practices, affect species dominance and population densities of the two mite species in apple orchards.


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