Welcome to Chinese Journal of Tropical Crops,

Chinese Journal of Tropical Crops ›› 2020, Vol. 41 ›› Issue (9): 1856-1864.DOI: 10.3969/j.issn.1000-2561.2020.09.019

• Plant Protection & Bio-safety • Previous Articles     Next Articles

Interspecific Molecular Phylogeny and Biological Characteristics of Colletotrichum acutatum Complex Species Causing Colletotrichum Leaf Disease on Rubber Trees in China

JIANG Tao1,LIU Xianbao2,LI Boxun2,ZHENG Xiaolan2,CAI Jimiao2,FENG Yanli2,HUANG Guixiu2,*()   

  1. 1. College of Plant Protection, Hainan University, Haikou, Hainan 570228, China
    2. Environment and Plant Protection Institute, Chinese Academy of Tropical Agricultural Sciences / Key Laboratory of Integrated Pest Management on Tropical Crops, Ministry of Agriculture and Rural Affairs, China / Hainan Key Laboratory for Monitoring and Control of Tropical Agricultural Pests, Haikou, Hainan 571101, China
  • Received:2019-10-12 Revised:2020-01-08 Online:2020-09-25 Published:2020-10-16
  • Contact: HUANG Guixiu

Abstract:

In order to clarify the biological characteristics and interspecific differences of Colletotrichum acutatum complex species from rubber trees in China, four representative strains (C. bannanense YNML52, C. laticiphilum YNJH17109, C. australisinense GX1655, YNJP162) were evaluated for the utilization of different carbon, nitrogen sources and colony growth at different temperature, pH and water activities. The pathogenicity of the strains to different rubber varieties and crops was also evaluated. There were significant differences in the utilization of carbon and nitrogen sources, suitable growth temperature, lethal temperature, pH value and water activity of the tested strains. There were significant differences in pathogenicity spectrum of the tested strains. YNML52 had a narrow host range and strong host specificity. Evaluating the effects of ecological factors on the biological characteristics of the pathogen of rubber tree anthracnose is of certain guiding significance for understanding the occurrence regularity of the disease and formulating effective control strategies.

Key words: rubber trees, Colletotrichum acutatum complex species, biological characteristics, pathogenicity

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