Seed-borne fungi of chilli
Untreated chilli (Capsicum annum, Kulai) seeds obtained from the Federal Experimental Station, Serdang, Selangor, were screened for seed-borne fungi. Seeds treated with 10% chlorox, fungicides Thiram and Captan and hot water (55°C, 60°C and 70°C) for 10 min were also screened. For each treatment...
| Main Authors: | , , |
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| Format: | Conference or Workshop Item |
| Language: | English |
| Published: |
1990
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| Online Access: | http://psasir.upm.edu.my/id/eprint/18666/ http://psasir.upm.edu.my/id/eprint/18666/1/ID%2018666.pdf |
| _version_ | 1848843565567836160 |
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| author | Ho, Yin Wan Kanapathipillai, V. Hashim, M. |
| author_facet | Ho, Yin Wan Kanapathipillai, V. Hashim, M. |
| author_sort | Ho, Yin Wan |
| building | UPM Institutional Repository |
| collection | Online Access |
| description | Untreated chilli (Capsicum annum, Kulai) seeds obtained from the
Federal Experimental Station, Serdang, Selangor, were screened for seed-borne
fungi. Seeds treated with 10% chlorox, fungicides Thiram and Captan
and hot water (55°C, 60°C and 70°C) for 10 min were also screened. For
each treatment, 400 seeds were screened using the agar medium and blotter
methods. Fungi isolated were tested for pathogenicity on chilli seeds
and seedlings. Twenty-one species from 14 genera of fungi viz, Aspergillus,
Cephalosporium, Clardoporium, Curvularia, Fusarium, Geotrichum, Gliocladium,
Nodulisporium, Paecilomyces, Penicillium, Rhizoctonia, Rhizopus,
Trichoderma and Schizophyllum were isolated from the untreated seeds.
Treatments of seeds with Captan and Thiram completely eradicated all the
fungal species, except Aspergillus niger and A. flavus ) from the seeds
without affecting their germination. On the other hand, treatment of seeds
with 10% chlorox was found to be less effective.
Hot water treatments of seeds at 55°C and 60°C were found to be effective
in killing most of the seed-borne fungi while still maintaining a high
percentage of seed germination. Hot water treatment at 70°C eradicated all
fungi except A. niger and A. flavus but this treatment is not recommended
as it killed all the seeds.
Preliminary pathogenicity test with all the fungal isolates on the chilli
seeds indicated that 8 fungal species (Aspergillus niger, A. flavus,
Rhizopus sp. Cephalosporium. sp. Penicillium citrinum. Fusarium oxysporum,
F. semitectum and Curvularia lunata) were pathogenic. Further
pathogenicity test, with the 8 fungal species on 100 seeds each, showed
that all the 8 species were pathogenic, causing infection and death of
the seeds, thus resulting in significant (P-0.05) reduction in germination
(Table 1). Mazanah (1977) has also shown A. niger, A. flavus, Fusarium sp,
Curvularia sp and Rhizopus sp to be pathogenic to chilli seeds.
Pathogenicity test with all fungal isolates on chilli seedlings (75
seedlings for each isolate) showed that 9 fungal species were pathogenic
to the seedlings (Table 2). |
| first_indexed | 2025-11-15T08:17:03Z |
| format | Conference or Workshop Item |
| id | upm-18666 |
| institution | Universiti Putra Malaysia |
| institution_category | Local University |
| language | English |
| last_indexed | 2025-11-15T08:17:03Z |
| publishDate | 1990 |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | upm-186662015-01-07T07:34:20Z http://psasir.upm.edu.my/id/eprint/18666/ Seed-borne fungi of chilli Ho, Yin Wan Kanapathipillai, V. Hashim, M. Untreated chilli (Capsicum annum, Kulai) seeds obtained from the Federal Experimental Station, Serdang, Selangor, were screened for seed-borne fungi. Seeds treated with 10% chlorox, fungicides Thiram and Captan and hot water (55°C, 60°C and 70°C) for 10 min were also screened. For each treatment, 400 seeds were screened using the agar medium and blotter methods. Fungi isolated were tested for pathogenicity on chilli seeds and seedlings. Twenty-one species from 14 genera of fungi viz, Aspergillus, Cephalosporium, Clardoporium, Curvularia, Fusarium, Geotrichum, Gliocladium, Nodulisporium, Paecilomyces, Penicillium, Rhizoctonia, Rhizopus, Trichoderma and Schizophyllum were isolated from the untreated seeds. Treatments of seeds with Captan and Thiram completely eradicated all the fungal species, except Aspergillus niger and A. flavus ) from the seeds without affecting their germination. On the other hand, treatment of seeds with 10% chlorox was found to be less effective. Hot water treatments of seeds at 55°C and 60°C were found to be effective in killing most of the seed-borne fungi while still maintaining a high percentage of seed germination. Hot water treatment at 70°C eradicated all fungi except A. niger and A. flavus but this treatment is not recommended as it killed all the seeds. Preliminary pathogenicity test with all the fungal isolates on the chilli seeds indicated that 8 fungal species (Aspergillus niger, A. flavus, Rhizopus sp. Cephalosporium. sp. Penicillium citrinum. Fusarium oxysporum, F. semitectum and Curvularia lunata) were pathogenic. Further pathogenicity test, with the 8 fungal species on 100 seeds each, showed that all the 8 species were pathogenic, causing infection and death of the seeds, thus resulting in significant (P-0.05) reduction in germination (Table 1). Mazanah (1977) has also shown A. niger, A. flavus, Fusarium sp, Curvularia sp and Rhizopus sp to be pathogenic to chilli seeds. Pathogenicity test with all fungal isolates on chilli seedlings (75 seedlings for each isolate) showed that 9 fungal species were pathogenic to the seedlings (Table 2). 1990 Conference or Workshop Item NonPeerReviewed application/pdf en http://psasir.upm.edu.my/id/eprint/18666/1/ID%2018666.pdf Ho, Yin Wan and Kanapathipillai, V. and Hashim, M. (1990) Seed-borne fungi of chilli. In: 13th Malaysian Microbiology Symposium, 22-23 Aug. 1990, Hotel Grand Continental, Kuala Lumpur. . Capsicum annuum - Diseases and pests Seed-borne plant diseases Seed-borne phytopathogens |
| spellingShingle | Capsicum annuum - Diseases and pests Seed-borne plant diseases Seed-borne phytopathogens Ho, Yin Wan Kanapathipillai, V. Hashim, M. Seed-borne fungi of chilli |
| title | Seed-borne fungi of chilli |
| title_full | Seed-borne fungi of chilli |
| title_fullStr | Seed-borne fungi of chilli |
| title_full_unstemmed | Seed-borne fungi of chilli |
| title_short | Seed-borne fungi of chilli |
| title_sort | seed-borne fungi of chilli |
| topic | Capsicum annuum - Diseases and pests Seed-borne plant diseases Seed-borne phytopathogens |
| url | http://psasir.upm.edu.my/id/eprint/18666/ http://psasir.upm.edu.my/id/eprint/18666/1/ID%2018666.pdf |