Research in Plant Disease (식물병연구)

The Korean Society of Plant Pathology (한국식물병리학회)
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Suppression of Rhizome Rot in Organically Cultivated Ginger Using Integrated Pest Management

종합적 방제기술을 이용한 유기재배 생강의 근경썩음병 억제

  • Shim, Chang-Ki (Organic Agriculture Division, National Academic of Agricultural Science) ;
  • Kim, Min-Jeong (Organic Agriculture Division, National Academic of Agricultural Science) ;
  • Kim, Yong-Ki (Organic Agriculture Division, National Academic of Agricultural Science) ;
  • Hong, Sung-Jun (Organic Agriculture Division, National Academic of Agricultural Science) ;
  • Park, Jong-Ho (Organic Agriculture Division, National Academic of Agricultural Science) ;
  • Han, Eun-Jung (Organic Agriculture Division, National Academic of Agricultural Science) ;
  • Kim, Suk-Chul (Organic Agriculture Division, National Academic of Agricultural Science)
  • 심창기 (농촌진흥청 농업과학원 유기농업과) ;
  • 김민정 (농촌진흥청 농업과학원 유기농업과) ;
  • 김용기 (농촌진흥청 농업과학원 유기농업과) ;
  • 홍성준 (농촌진흥청 농업과학원 유기농업과) ;
  • 박종호 (농촌진흥청 농업과학원 유기농업과) ;
  • 한은정 (농촌진흥청 농업과학원 유기농업과) ;
  • 김석철 (농촌진흥청 농업과학원 유기농업과)
  • Received : 2015.07.28
  • Accepted : 2015.08.28
  • Published : 2015.09.30
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Abstract

This study was conducted to control ginger rhizome rot treated with the combined treatment, the hairy vetch, carbonized rice husk and eggshell calcium in organic ginger farm. Early symptoms of leaf yellowing and plant wilt began in the chemical fertilizer treatment on July 1. Ginger rhizome rot was more progressed on October 2, and stem browning and dead plant showed a high disease incidence with from 36.7% to 43.0%. On the other hand, the combined treatment did not occur at all until July 1 and delayed the disease incidence to October 2. It showed a low disease incidence of 1.3% to 1.7%. In the combined treatment, the content of soil Na, Fe, Cu was decreased and organic matter was increased twice with 31.6% than previous. Population density of Pythium sp. is lower in the combined treatment ($0.3-2.0{\times}10^3cfu/g$ than the chemical fertilizer treatments ($12.0-12.3{\times}10^3cfu/g$). The combined treatment, hairy vetch, carbonized rice husk and the eggshell calcium is able to control the ginger rhizome rot in organically cultivated ginger field.

본 연구는 유기농 생강재배지에서 발생한 생강 뿌리썩음병을 헤어리벳치와 난각칼슘+훈탄을 혼합 처리하여 방제하고자 하였다. 생강의 잎이 황화되고 식물체가 시드는 생강 근경썩음병의 병징은 화학비료 처리구에서 7월 1일부터 시작되었다. 수확기인 10월 2일에 생강 근경썩음병이 더욱 진전되어 생강의 줄기가 갈변하고 식물체가 고사하여 36.7-43.0%의 높은 발병율을 보였다. 반면에 헤어리벳치+훈탄+난각칼슘 처리구는 9월말까지 근경썩음병이 전혀 발생되지 않았고 10월 초순까지 발생이 지연되어 1.3-1.7%의 매우 낮은 발병율을 보였다. 토양내 Na, Fe, Cu 함량은 헤어리벳치+훈탄+난각칼슘 처리에 의해 처리 전보다 감소하였으나 유기물 함량은 31.6%로 시험 전보다 2배 증가하였다. 토양내 Pythium sp.의 밀도는 헤어리벳치+훈탄+난각칼슘 처리구($0.3-2.0{\times}10^3cfu/g$)에서 낮았으나, 화학비료 처리구($12.0-12.3{\times}10^3cfu/g$)에서 유의적으로 높았다. 따라서, 유기농 생강 재배지에 헤어리벳치를 녹비작물로 재배하고 토양 개량제인 훈탄과 난각칼슘을 토양에 처리하면 생강의 고질적인 병인 생강 근경썩음병을 효과적으로 방제할 수 있을 것으로 사료된다.

Keywords

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