Yearly Fluctuation of Migrated Aphids and PLRV Transmission Rate at Daegwallyeong Highland Region in Korea

대관령지역의 연도별 진딧물 비래 및 PLRV 보독률 변동

  • Kwon, Min (Highland Crop Research Div., National Highland Agricultural Experiment Station, RDA) ;
  • Park, Chun-Soo (Highland Crop Research Div., National Highland Agricultural Experiment Station, RDA) ;
  • Ham, Young-Il (Highland Crop Research Div., National Highland Agricultural Experiment Station, RDA) ;
  • Lee, Seung-Hwan (Div. of Agric, Entomology, National Institute of Agric. Science & Technology)
  • 권민 (농촌진흥청 고령지농업시험장 산지작물과) ;
  • 박천수 (농촌진흥청 고령지농업시험장 산지작물과) ;
  • 함영일 (농촌진흥청 고령지농업시험장 산지작물과) ;
  • 이승환 (농촌진흥청 농업과학기술원 작물보호부 농업해충과)
  • Published : 2002.12.01

Abstract

Based on accumulated data during 1977-2001, seasonal fluctuations of migrated aphids at Daegwallyeong highlands were analyzed. In addition, rates of PLRV transmission by migrated aphids were investigated by inoculation on indicator plant, Physazis floridana, and ELISA in 2000-2001, and the change of PLRV transmission rates by aphids was compared with that of 1989-1991. The average migrated aphid population densities in 1976-1980, 1991-1995, and 1996-2000 were 575.2, 2959.4 and 2281.6, respectively, showing gradual increase in recent years. The average peak time of aphid migration was from early to mid June during 1977-2001, showing any significant differences over the years. The dominant species, however, changed slowly; before mid 1980s M. persicae flied dominantly, but after mid 1980s Aphis gossypii did. Hahm et al. (1991) reported that PLRV transmission rate of migrated aphids during 1989-1991 was 6.7-10.0%. In 2000-2001, however, migrated aphids at Daegwallyeong highland showed 10.1-11.0%. Although present PLRV transmission rate was slightly higher than that of 10 years ago, taking increased population densities and diversity of migrated aphids into account, there was no significant change of PLRV transmission rate over the years.

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