Effect on Colony Growth Inhibition of Soil-Borne Fungal Pathogens by Available Chlorine Content in Sodium Hypochlorite

Lee, Sung-Hee;Shin, Hyunman;Kim, Ju-Hyoung;Ryu, Kyoung-Yul;Kim, Heung Tae;Cha, Byeongjin;Cha, Jae-Soon

  • Received : 2018.07.04
  • Accepted : 2018.12.09
  • Published : 2019.04.01


Our study investigated the available chlorine content, contact time and difference among strains of each pathogen for sodium hypochlorite (NaOCl) to control chemically against soil-borne fungal pathogens, such as Phytophthora rot by Phytophthora cactorum, violet root rot by Helicobasidium mompa, and white root rot by Rosellinia necatrix, causing die-back symptom on apple trees. As a result, the colony growth of Phytophthora cactorum was inhibited completely by soaking over 5 s in 31.25 ml/l available chlorine content of NaOCl. Those of H. mompa and R. necatrix were inhibited entirely by soaking over 160 s in 62.5 and 125 ml/l available chlorine content in NaOCl, respectively. Also, inhibition effect on available chlorine in NaOCl among strains of each soil-borne pathogen showed no significant difference and was similar to or better than that of fungicides.


apple tree die-back;disease control;sodium hypochlorite;soil-borne diseases


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Grant : Cooperative Research Program for Agriculture Science and Technology Development

Supported by : Rural Development Administration