Foliar Application of the Fungicide Pyraclostrobin Reduced Bacterial Spot Disease of Pepper

Beom Ryong Kang; Jang Hoon Lee; Young Cheol Kim

Foliar Application of the Fungicide Pyraclostrobin Reduced Bacterial Spot Disease of Pepper

2018

Beom Ryong Kang | Jang Hoon Lee | Young Cheol Kim

Pyraclostrobin is a broad-spectrum fungicide that inhibits mitochondrial respiration. However, it may also induce systemic resistance effective against bacterial and viral diseases. In this study, we evaluated whether pyraclostrobin enhanced resistance against the bacterial spot pathogen, Xanthomonas euvesicatora on pepper (Capsicum annuum). Although pyraclostrobin alone did not suppressed the in vitro growth of X. euvesicatoria, disease severity in pepper was significantly lower by 69% after treatments with pyraclostrobin alone. A combination of pyraclostrobin with streptomycin reduced disease by over 90% that of the control plants. The preventive control of the pyraclostrobin against bacterial spot was required application 1-3 days before pathogen inoculation. Our findings suggest that the fungicide pyraclostrobin can be used with a chemical pesticide to control bacterial leaf spot diseases in pepper.

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