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Occurrence of Stink Bugs and Pecky Rice Damage by Stink Bugs in Paddy Fields in Gyeonggi-do, Korea

경기도 벼 재배지 노린재류의 발생소장과 벼 반점미 피해

  • Lee, Jin-Gu (Gyeonggi-do Agricultural Research and Extension Services) ;
  • Hong, Soon-Sung (Gyeonggi-do Agricultural Research and Extension Services) ;
  • Kim, Jin-Young (Gyeonggi-do Agricultural Research and Extension Services) ;
  • Park, Kyeong-Yeol (Gyeonggi-do Agricultural Research and Extension Services) ;
  • Lim, Jae-Wook (Gyeonggi-do Agricultural Research and Extension Services) ;
  • Lee, Joon-Ho (Department of Agricultural Biotechnology, Seoul National University)
  • 이진구 (경기도농업기술원 환경농업연구과) ;
  • 홍순성 (경기도농업기술원 환경농업연구과) ;
  • 김진영 (경기도농업기술원 환경농업연구과) ;
  • 박경열 (경기도농업기술원 환경농업연구과) ;
  • 임재욱 (경기도농업기술원 환경농업연구과) ;
  • 이준호 (서울대학교 농생명공학부)
  • Published : 2009.03.30

Abstract

This study was carried out to survey the occurrence of stink bugs and pecky rice grain caused by the stink bugs in paddy fields in six districts of Gyeonggi-do. In the levee of the paddy fields, 30 species of the stink bugs were collected, and the dominant species were Paromius exiguus in Hwaseong and Siheung, and Stenotus rubrovittatus in Pyeongtaek, Icheon and Paju. In the paddy fields, 23 species were collected, and the dominant species were Paromius exiguus in Siheung, and Stenotus rubrovittatus in Pyeongtaek, Icheon and Paju. P. exiguus overwintered and proliferated mainly in the west coastal region, where its host plants, Imperata cylindrica and Calamagrostis epigeois, were abundant, and then moved to paddy fields later in the season, resulting in the peak density in September in paddy area. Stenotus rubrovittatus and Cletus punctiger were abundant in paddy area in August and September, and Eysarcoris aeneus was abundant in June and July. When the stink bugs were inoculated on the rice, the rate of pecky rice caused by E. aeneus and P. exiguus at milk ripe stage was 10.2% and 4.8%, respectively, and the rate by S. rubrovittatus and P. exiguus at dough ripe stage was 4.3% and 2.7%, respectively. The damage shape of pecky rice was distinctive according to the species. The surface of pecky rice by P. exiguus was very smooth but the surface of pecky rice by E. aeneus was rough and caved. In the pecky rice by S. rubrovittatus, the spot occurred at the topside of the grain.

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