Distribution and Pathogenic Potential of Soil Fusaria from Selected Oil Palm Habitats in West Malaysia
A total of eight species and two varieties of Fusarium was isolated from the sampling sites in the oil palm habitat. Fusarium solani and Fusarium oxysporum were the most prevalent species followed by Fusarium semitectum. The other species and varieties isolated showed a more sporadic occurrence....
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| Format: | Thesis |
| Language: | English English |
| Published: |
1984
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| Subjects: | |
| Online Access: | http://psasir.upm.edu.my/id/eprint/10212/1/FP_1984_3.pdf http://psasir.upm.edu.my/id/eprint/10212/ |
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| Summary: | A total of eight species and two varieties of
Fusarium was isolated from the sampling sites in the oil
palm habitat. Fusarium solani and Fusarium oxysporum were
the most prevalent species followed by Fusarium semitectum.
The other species and varieties isolated showed a more sporadic occurrence. Generally, soils from oil palm
rhizospheres and young palm areas contained a larger number
and greater variety of Fusarium species than soils from
the avenues and older palm areas.
Pathogenicity tests of Fusarium species isolated
showed that none were capable of producing vascular wilt
or other diseases on oil palm seedlings. Some of the
isolates, however, caused a reduction of growth in the
test seedlings.
Comparative studies of F. oxysporum isolates from oil
palm habitat in Malaysia with F. oxysporum f. sp. elaeidis
isolates from Africa showed that the two groups of isolates
were ind istinguishable in their cultural, morphological
and isozyme characteristics. Subsequent pathogenicity
tests proved that the F. oxysporum isolates from Africa
were pathogenic, causing vascular wilt on the Malaysian
oil palm seed lings whilst the F. oxysporum isolates from
Malaysia were non-pathogenic to the wilt-susceptible
African oil palm seed lings and Malaysian oil palm
seed lings. Inoculation of Malaysian F. oxysporurn
isolates on Malaysian oil palm seedlings and wilt-susceptible
African oil palm seedlings, subjected to an initial
period of water stress, also did not result in showing
any d isease symptoms. |
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