Journal
TROPICAL LIFE SCIENCES RESEARCH
Volume 31, Issue 3, Pages 29-45Publisher
PENERBIT UNIV SAINS MALAYSIA
DOI: 10.21315/tlsr2020.31.3.3
Keywords
Disease Prevalence; Cucumber; Fusarium oxysporum; Fusarium solani
Categories
Funding
- Malaysian Agriculture Research and Development Institute (MARDI)
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Fusarium wilt disease is one of the most problematic and destructive disease in cucumber production. The causative agents are Fusarium oxysporum and F. solani. These pathogens are soil borne and transmitted through infested soil and water. A field survey was conducted to study the disease prevalence in the major growing areas of cucumber in Peninsular Malaysia. Field study revealed that the disease was highly prevalence in the field with the disease incidence was in the range of 10%-60%. The morphological properties of F. oxysporum are microconidia (3.8-15.7 mu m x 2.9-4.9 mu m), macroconidia (14.8-38.5 mu m x 2.4-5.7 mu m) and number of septate was 1-4. While for F. solani are microconidia (3.39-14.63 mu m x 2.36-4.44 mu m), macroconidia (7.22-50.46 mu m x 2.43-6.14 mu m) and number of septate was 1-5. Based on molecular identification had confirmed that the disease is caused by F. oxysporum and F. solani with similarity index of 99%-100% based on internal transcribed spacer (ITS) gene sequences. The pathogenicity test showed that the symptoms of Fusarium wilt disease was firstly appeared as yellowing of old leaves. Progressively, the infected plant will be wilted and finally died. The outputs of this study are highly important to establish an effective disease management programme to reduce disease prevalence and yield loss in the field.
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