Identification and Biological Characteristics of <i>Dalbergia odorifera </i>Leaf Blight
Welcome to Chinese Journal of Tropical Crops,

Chinese Journal of Tropical Crops ›› 2020, Vol. 41 ›› Issue (5): 1007-1012.DOI: 10.3969/j.issn.1000-2561.2020.05.022

• Crop Pests, Diseases and Their Control, Environmental Protection • Previous Articles     Next Articles

Identification and Biological Characteristics of Dalbergia odorifera Leaf Blight

CHEN Yao,LI Hangyu,ZHOU Deming()   

  1. Central South University of Forestry and Technology / Key Laboratory of National Forestry and Grassland Administration on Control of Artificial Forest Diseases and Pests in South China / Hunan Provincial Key Laboratory for Control of Forest Diseases and Pests / Key Laboratory for Non-wood Forest Cultivation and Conservation of Ministry of Education, Changsha, Hunan 410000, China
  • Received:2019-06-27 Revised:2019-09-15 Online:2020-05-25 Published:2020-06-15
  • Contact: ZHOU Deming

Abstract:

In recent years, the harmfulness of Dalbergia odorifera leaf blight has become more and more serious. In order to provide a basis for the control and comprehensive treatment of this disease, the pathogenic fungus causing the disease was isolated and identified and the biological characteristics were studied. In this study, the pathogenic fungus was isolated from the pathogen of D. odorifera leaf blight, and the morphological observation of the pathogenic fungi was carried out. And the rDNA-ITS sequence was obtained by sequencing. The pathogenic fungus was identified as Phomopsis asparagi. Through experiments on the growth medium, temperature, pH value and illumination of the pathogens, the mycelial growth of the fungus in PFA medium was the fastest. The mycelium could grow at 10-30 ℃, and the optimum temperature for mycelium growth was 25-30 ℃. The optimum pH for the mycelium growth was 6. Light had no significant effect on the growth of the pathogen.

Key words: Dalbergia odorifera, leaf blight, Phomopsis asparagi, identification, biological characteristics

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