Welcome to Chinese Journal of Tropical Crops,

Chinese Journal of Tropical Crops ›› 2021, Vol. 42 ›› Issue (2): 488-494.DOI: 10.3969/j.issn.1000-2561.2021.02.026

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

Identification and Biological Characteristics of Pathogen of Ganoderma Causing Stem Rot on Hevea brasiliensis

HU Zhenzhen, LI Zengping*(), SHAN Jinxue, ZHANG Yu, XIONG Qiuyu, WU Ruhui   

  1. Institute of Plant Protect, Hainan University / Key Laboratory of Green Prevention and Control of Tropical Plant Diseases and Pests, Ministry of Education, Haikou, Hainan 570228, China
  • Received:2019-11-27 Revised:2020-04-23 Online:2021-02-25 Published:2021-02-25
  • Contact: LI Zengping

Abstract:

A new stalk rot disease was found in rubber forests in Chengmai, Hainan Province. It was caused by a wood rot fungus of Ganoderma infecting the stems of live rubber trees. The incidence rate of the plant was about 1%-2%, which occured in the field. When rubber trees were infected by this stem rot disease, the leaves on the newly extracted shoots were chlorotic, dull, and fell off after yellowing. Later the crowns were sparse, poor growth, branches dead, and tissues of diseased stem xylem white rot. Some plants die when they were seriously ill. The pathogenicity and morphological characteristics were determinated, and the ITS, LSU and SSU multigene phylogenetic trees were established. Results showed that the pathogen causing stem rot of Hevea brasiliensis was Ganoderma austral (Fr.) Pat. Tests on biological characteristics showed that the optimum identified growth conditions for G. austral were 30 ℃, pH 6.0, continuous darkness, PDA.

Key words: Hevea brasiliensis, stem rot, Ganoderma austral (Fr.) Pat., biological characteristics

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