Abstract:
Fusarium spps. are diverse and exist widely, with a large range of hosts and capability of rapid propagation, making them as pathogens even lethal to most of plants. Recently, diseases caused by
Fusarium spps. occur frequently in rubber tree plantation in China. In order to find the death reason of a young rubber tree in Hainan Guangba region, one pathogen was finally identified as
Fusarium equiseti based on its pathogenicity, morphology and molecular identification, named as Fusarium-Hb in this study. Owing to its high pathogenicity and its easy adaption to light, temperature and a large range of pH 4 - 11 growth condition, this Fusarium-Hb could produce abundant microspores, macrospores and chlamydospores, which should be given enough attention in future. In addition, the most efficient fungicide agents and adoptions were screened by comparison with the inhibition effect of five fungicide single agents on Fusarium-Hb. These results showed that 40% Fuxing emulsifiable concentrates were the first choice for killing Fusarium-Hb and 70% thiophanate methyl powder was the second. In a word, Fusarium-Hb was firstly identified as pathogen of killing rubber tree and the most efficient fungicides were selected out for application to field management in this study.