Sensitivity and fitness analysis of round spot of Panax notoginseng Mycocentrospora acerina to azoxystrobin, prochloraz and difenoconazole
Received:January 19, 2019    Download the full
DOI：10.16801/j.issn.1008-7303.2019.0037
Key Words:round spot of Panax notoginseng  Mycocentrospora acerina  azoxystrobin  prochloraz  difenoconazole  sensitivity  fitness
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Author NameAffiliationE-mail
WANG Huiling Key Laboratory of Agricultural Biodiversity for Plant Disease Control, Ministry of Education, Yunnan Agricultural University, Kunming 650201, China  
WANG Fei Key Laboratory of Agricultural Biodiversity for Plant Disease Control, Ministry of Education, Yunnan Agricultural University, Kunming 650201, China  
JIN Baihui Key Laboratory of Agricultural Biodiversity for Plant Disease Control, Ministry of Education, Yunnan Agricultural University, Kunming 650201, China  
ZHANG He Key Laboratory of Agricultural Biodiversity for Plant Disease Control, Ministry of Education, Yunnan Agricultural University, Kunming 650201, China  
YANG Kuan Key Laboratory of Agricultural Biodiversity for Plant Disease Control, Ministry of Education, Yunnan Agricultural University, Kunming 650201, China  
WANG Wenpeng Key Laboratory of Agricultural Biodiversity for Plant Disease Control, Ministry of Education, Yunnan Agricultural University, Kunming 650201, China  
YANG Min Key Laboratory of Agricultural Biodiversity for Plant Disease Control, Ministry of Education, Yunnan Agricultural University, Kunming 650201, China  
ZHU Shusheng Key Laboratory of Agricultural Biodiversity for Plant Disease Control, Ministry of Education, Yunnan Agricultural University, Kunming 650201, China  
HE Xiahong Key Laboratory of Agricultural Biodiversity for Plant Disease Control, Ministry of Education, Yunnan Agricultural University, Kunming 650201, China hexiahong@hotmail.com 
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Abstract:
      The sensitivities of 34 strains of Mycocentrospora acerina to azoxystrobin, prochloraz and difenoconazole were tested using the mycelium growth rate method, the strains were isolated from 5 major origins of Panax notoginseng in Yunnan Province. The survival fitness was also analyzed. The results showed that those fungicides had high inhibition effect on the mycelium growth of strains. The EC50 values of prochloraz, azoxystrobin and difenoconazole to all tested strains are in the range of 0.03-1.91 mg/L, 0.18-2.36 mg/L and 0.45-2.15 mg/L, respectively. The sensitivities of all strains to prochloraz were higher than that of azoxystrobin and difenoconazole. The difference of mycelial growth for the sensitive and the insensitive strains was not significant, which demonstrated that all strains showed high survival fitness in field.
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