The Control of Rice Blast Disease by the Novel Biofungicide Formulations

Wen-Ching Chen, Tai-Ying Chiou, Aileen L. Delgado and Chien-Sen Liao
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Wen-Ching Chen: International Bachelor Program of Agribusiness, National Chung-Hsing University, Taichung 40227, Taiwan
Tai-Ying Chiou: School of Regional Innovation and Social Design Engineering, Kitami Institute of Technology, Hokkaido 090-8507, Japan
Aileen L. Delgado: Environmental Engineering Graduate Program, University of the Philippines-Diliman, Manila 1000, Philippines
Chien-Sen Liao: Department of Civil and Ecological Engineering, I-Shou University, Kaohsiung 84001, Taiwan

Sustainability, 2019, vol. 11, issue 12, 1-9

Abstract: The study aims to develop novel biofungicide formulations against rice blast disease. A total of 300 rhizobacteria strains were isolated from rice field soil and were examined for the inhibition of Magnaporthe oryzae growth in a vitro test. Among them, only six rhizobacteria showed inhibition against M. oryzae . The three strains that showed the highest inhibition were Bacillus subtilis 5, B. cereus 3S5, and Pseudomonas fluorecens 10S2. A rice hull mixture and liquid medium were mixed with the above-mentioned bacterial suspensions into three bacterial formulas and tested separately on the rice cultivar UPLRi-5 after infection by M. oryzae under a controlled condition. The three novel biofungicide formulas significantly inhibited rice blast disease intensity with a mean disease control rate being approximately 31% higher than the control. The formulas proved to be effective and should be considered as promising novel treatments for rice blast disease.

Keywords: rhizobacteria; rice blast disease; biocontrol; biofungicide (search for similar items in EconPapers)
JEL-codes: O13 Q Q0 Q2 Q3 Q5 Q56 (search for similar items in EconPapers)
Date: 2019
References: View complete reference list from CitEc
Citations: View citations in EconPapers (3)

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