Efficacy of a petroleum spray oil for the control of citrus pests, spirea aphid (Aphis citricola) and two scales (lcerya purchasi and Planococcus cryptus) in Jeju island

감귤의 조팝나무 진딧물 및 깍지벌레류에 대한 Petroleum Spray Oil의 방제효과

  • Kim, Dong-Whan (Citrus Experiment Station, National Jeju Agriculture Experiment Station, RDA) ;
  • Kang, Si-Yong (Subtropical Horticulture Research Center, Cheju National University) ;
  • Kim, Kwang-Sik (Citrus Experiment Station, National Jeju Agriculture Experiment Station, RDA) ;
  • Song, Jeong-Hueb (Jeju-do Agricultural Research and Extension Service) ;
  • Hyun, Jae-Uk (Jeju-do Agricultural Research and Extension Service) ;
  • Riu, Key-Zung (Subtropical Horticulture Research Center, Cheju National University)
  • 김동환 (농촌진흥청 제주농업시험장 감귤시험장) ;
  • 강시용 (제주대학교 아열대원예산업연구센터) ;
  • 김광식 (농촌진흥청 제주농업시험장 감귤시험장) ;
  • 송정흡 (제주도 농업기술원) ;
  • ;
  • 류기중 (제주대학교 아열대원예산업연구센터)
  • Published : 2001.03.30

Abstract

The efficacy of petroleum spray oil (PSO; D-C Tron $Plus^{(R)}$) against spirea aphid (Aphis citricola) and two scales (lcerya purchasi and Planococcus cryptus) on citrus was tested in Jeju, Korea. The control value of 0.33% PSO against spirea aphid was over 90% at 3 and 6 days after treatment (DAT), and then decreased to about 80% at 9 and 14 DAT. Spraying of PSO (0.33, 0.66, 1%) against cottony-cushion scale showed a much lower control value (less than 50%) during the investigation period compared to that of the conventional pesticide (Methion). When used against tile scale, Planococcus cryptus, the control value of 1% PSO was 95%, but that of 0.33% and 0.66% PSO only ranged from 50 to 80%, lower than the conventional pesticide. The results of this study, as with a previous study, suggest that spraying of 0.33% and 0.5% PSO not only controls the spirea aphid, but also reduces the density of two scales (lcerya purchasi and Planococcus cryptus) on citrus tree in Jeju, without phytotoxic damage.

Keywords

citrus;D-C-Tron Plus^{(R)}$;spirea aphid;scale;petroleum spray oil(PSO)