We found a match
Your institution may have access to this item. Find your institution then sign in to continue.
- Title
Efficacy of a novel succinate dehydrogenase inhibitor pydiflumetofen to control rice bakanae disease caused by Fusarium fujikuroi.
- Authors
HOU Yiping; QU Xiangpu; CAI Xiaowei; WU Luoyu; CHEN Changjun; WANG Jianxin; TIAN Baohua; ZHOU Mingguo
- Abstract
Fusarium fujikuroi is the main pathogen causing rice bakanae disease. The fungicide pydiflumetofen is a novel succinate dehydrogenase inhibitor (SDHI). The activity of pydiflumetofen against F. fujikuroi and its efficacy of controlling rice bakanae disease is obscure. In this study, 100 strains of F. fujikuroi were isolated from different regions of Jiangsu and Zhejiang Province in China. The baseline sensitivity of F. fujikuroi to pydiflumetofen was established by mycelial growth assay and spore germination assay respectively, and physiological effect of the fungicide against F. fujikuroi and its control efficacy were investagated. The EC50 (half effective concentration) values of pydiflumetofen on restraining mycelial growth against F. fujikuroi population (n = 100) ranged from 0.012 5 μg/mL to 0.111 8 μg/mL and the mean value was 0.050 3 (± 0.002 9) μg/mL. The EC50 values of pydiflumetofen on inhibiting spore germination distributed from 0.000 1 μg/mL to 0.024 5 μg/mL and the mean value was 0.003 8 (± 0.000 5) μg/mL. Treated with 0.05 μg/mL (EC50 value) or 1.3 μg/mL (EC90 value) pydiflumetofen, the offshoot of top mycelia of F. fujikuroi increased while sporulation production descreased. The membrane structure and organelles (eg. mitochondria) were damaged and the intracellular plasma leakage increased through imperfect membrane. There was no significant difference in the exopolysaccharides production while peroxidase activity declined after treated with pydiflumetofen. Control efficacy of 10, 15 and 20 g a.i./100 kg seeds of pydiflumetofen against rice bakanae disease by seed dressing is 94.77%, 98.60 % and 100% respectively. Above results indicate that pydiflumetofen has very high activity against F. fujikuroi and is a nice fungicide for controlling rice bakanae disease caused by F. fujikuroi.
- Subjects
ZHEJIANG Sheng (China); JIANGSU Sheng (China); SUCCINATE dehydrogenase; FUSARIOSIS; RICE; RICE breeding; ORGANELLES
- Publication
Chinese Journal of Pesticide Science / Nongyaoxue Xuebao, 2021, Vol 23, Issue 3, p483
- ISSN
1008-7303
- Publication type
Article
- DOI
10.16801/j.issn.1008-7303.2021.0084