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Control Effect of Phosphate Compounds on Phytophthora Blight and Anthracnose of Pepper
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고추 역병과 탄저병에 대한 인산염 화합물의 방제 효과

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Type
Academic journal
Author
Seojeong Park (충북대학교) Heung Tae Kim (충북대학교)
Journal
The Korean Society Of Pesticide Science The Korean Journal of Pesticide Science Vol.21 No.1 KCI Accredited Journals
Published
2017.3
Pages
26 - 32 (7page)
DOI
10.7585/kjps.2017.21.1.26

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Control Effect of Phosphate Compounds on Phytophthora Blight and Anthracnose of Pepper
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Abstract· Keywords

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Antimicrobial activity of 6 phosphate compounds as H₃PO₃, H₃PO₄, K₃PO₄, K2HPO₄, KH2PO₄ and NH₄H2PO₄ against Phytophthora capsici JHAW 1-2 and Colletotrichum acutatum JC24 was investigated in this study. Inhibitory effect on zoospore release, zoosporangia germination and zoospore germination was superior than mycelial growth. Among 6 compounds, H₃PO₃ and H₃PO₄ showed the best antimicrobial activity against P. capsici JHAW 1-2. Diseases controlling activity of the phosphate compounds tested on seedling and fruit of pepper against Phytophthora blight was also better than those against anthracnose. When H₃PO₃ was applied to the pepper seedlings at a concentration of 100 μg mL<SUP>−1</SUP>, severe phytotoxicity was occurred. However, with applying 10 μg mL<SUP>−1</SUP> of H₃PO₃ showed 100% the disease control efficacy. In case of 100 μg mL<SUP>−1</SUP> H₃PO₄ application showed excellent antimicrobial activity against P. capsici JHAW 1-2, and 56.7% of the disease control efficacy with no phytotoxicity. To investigate the control efficacy against anthracnose, conidia suspension was inoculated with non-wound and wound inoculation method on pepper fruit. Among 6 compounds, only 100 μg mL<SUP>−1</SUP> of H₃PO₃ and H₃PO₄ had a activity of more than 70%, but thecontrol activity on other treatments was minimal or unacceptable.

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UCI(KEPA) : I410-ECN-0101-2017-523-002394426