Biologi and Control of White Root Disease of Hevea Rubber Caused by Rigidoporus Lignosus (Klotzsch) Imazeki
White root disease is by far the most serious among the three major root diseases of rubber. Current methods of control of the disease include pre-planting control procedures, such as mechanical or hand clearing, sulphur amendment, use of covers and intercrops: post-planting control procedures,...
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| Main Author: | |
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| Format: | Thesis |
| Language: | English English |
| Published: |
1987
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| Subjects: | |
| Online Access: | http://psasir.upm.edu.my/id/eprint/10232/1/FP_1987_10.pdf |
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| Summary: | White root disease is by far the most serious among the
three major root diseases of rubber. Current methods of control
of the disease include pre-planting control procedures, such as
mechanical or hand clearing, sulphur amendment, use of covers and
intercrops: post-planting control procedures, i.e. disease
detection, treatnent with collar protectant dressing: the use of
isolation trenches in mature rubber: and more recently the
application of calixin emulsion as soil drench.
High costs of labour and chemicals, however, made these
methods rather expensive, not to mention the serious hazard
chemicals pose to the environment.
This study explored same possible methods of white root
disease control which minimize, if not completely avoid, dependency on chemicals. Such methods as introduction of
antagonists, application of chemicals at minimal rate and
addition of organic matter supplement applied either individually
or in combination with each other were included in the study.
Results demonstrated that chemically assisted biological
control against white root disease could be achieved with
combined application of the different treatments It was also
evident that the inclusion of antagonists and caw manure in the
treatments further enhanced increase of population of the
mycoflora. Fifty percent of the treatments with total population
of mycoflora significantly higher than that of the control
included both antagonists and caw manure. |
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