Research in Plant Disease (식물병연구)

The Korean Society of Plant Pathology (한국식물병리학회)
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Control of Potato Late blight (Phytophthora infestans) with Postassium Phosphonate

아인산염의 감자 역병 방제효과

  • Hong, Soon-Yeong (Jeju-do Agricultural Research & Extension Service) ;
  • Lee, Kwang-Seok (Jeju-do Agricultural Research & Extension Service) ;
  • Kang, Yong-Kil (Department of Plant Resource Science, Cheju National University) ;
  • Jee, Hyeong-Jin (Plant Pathology Division, National Institute of Agricultural Science and Technology)
  • Published : 2003.09.01
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Abstract

Effect of potassium phosphonate on control of potato late blight was evaluated at two fields in Jeju island. The chemical showed 82.5% control value in field located at low seacoast with 100 m elevation, while dimethomorph copper oxychloride showed 75.9 % control value. However, its control value was only 40% in another field located at mid-hilly area with 300 m elevation, in which environmental conditions of high hummudity and often rainfall were favorable to the disease development. Application intervals of the phosphonate from 7 to 15 effectively suppressed the disease and did not show statistically different control values among the spraying intervals. Results indicated that phosphonate similarly or more effectively controls potato late blight than fungicide, however, its control value could be vared according to enviromental conditions for the disease development and 15-d spraying intervals ware sufficient to suppress ther disease.

아인산염을 이용하여 감자 역병방제 시험을 실시한 결과 해발 100m 의 해안지역에서 방제가는 82.5%로 dimethomorph + copper oxychloride 500배액 처리시 방제가 75.9%보다 효과적이었다. 그러나 해발 300 m의 중산간 지대에서는 높은 습도와 잦은 비 날씨로 방제가가 40.0%로 낮았으나 농약처리 효과와 비슷하였다. 감자 역병 방제를 위한 아인산염 살포 간격은 15일이 적합하였다.

Keywords

References

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