HUBEI AGRICULTURAL SCIENCES ›› 2020, Vol. 59 ›› Issue (2): 82-86.doi: 10.14088/j.cnki.issn0439-8114.2020.02.017

• Plant Protection • Previous Articles     Next Articles

Identification and biological characteristics of the pathogen from peanut web blotch in Liaoning province

XIE Jin-hui, LIN Ying, ZANG Chao-qun, PEI Xue, LIANG Chun-hao   

  1. Plant Protection Research Institute,Liaoning Academy of Agricultural Sciences, Shenyang 110161,China
  • Received:2019-03-21 Published:2020-04-24

Abstract: In order to confirm the pathogen of peanut web blotch in Liaoning province, the pathogenicity of pure cultures separated from the disease samples was determined by Kirsch's rule, and the pathogenic bacteria were identified according to their morphological characteristics and ITS sequence analysis. The biological characteristics of pathogenic bacteria were studied by colony growth method and concave glass slide germination method. The results showed that the pathogen of peanut netted spot disease in Liaoning province was Peyronellaea arachidicola. The optimum temperature of mycelium growth was 23 ℃. The best carbon source was maltose, the best nitrogen source was yeast paste, the optimum pH was 7, the light dark alternation was beneficial to the mycelium growth and the mycelial lethal temperature was 45 ℃. The optimum temperature for conidia germination was 25 ℃, the optimum pH was 7, and the illumination condition was beneficial to conidial germination.

Key words: peanut(Arachis hypogaea Linn.), peanut web blotch, Peyronellaea arachidicola, biological characteristics

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