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Seed borne fungi of Brassica chinensis L. and Brassica rapa L. and their pathogenic importance


Citation

Kanapathipillai, Vijaya S. and Hashim, Zainab (1981) Seed borne fungi of Brassica chinensis L. and Brassica rapa L. and their pathogenic importance. Malaysian Agricultural Journal, 53 (2). pp. 90-96. ISSN 0025-1321

Abstract

In using the filter paper and agar plate procedures, a total of 35 species of fungi, namely, Alternaria brassicae, Aspergillus aculeatus, Acflavus, A. ochraceous, A. terreus, Botryodiplodia theobromae . Choanephora curcurbitarum, Circinella, sp., Cladosporium sphaerosporum, Colletotrichum sp., Cylindocladium sp., Curvularia lunata. C. pallescens, C. oryzae, Diaporthe sp., Erysiphe sp., Fusarium equiseti, F. fusaroides, F. oxysparum, F. moniliforme var subglutinans, Helminthosporium sp., Macrophomina phaseolina, Nigrospora orvzae, Paccilornyces sp., Penicillium nigricans, P. nototum, P. rugulosum, P. wortmanii, Peronospora sp., Pest alotia sp., Phaetricoconis sp .. Phomu linguni. Pythium sp .. Rhizopus stolonifer and Syncephalastruni racemosum were found to be present on seeds of Brassica chinensis and B. rapa. Both Malt extract agar and Potato Dextrose agar gave more infection counts of seeds than filter paper. Surface disinfection with mercuric chloride eliminated contaminants like Aspergillus spp., Penicillium sp., and some mucuraceous fungi, but did not affect germination. Inclusion of sodium chloride in media, allowed growth of osmophilic fungi and did reduce germination of seeds. Soil inoculation tests on emerging seedlings using nine selected isolates indicated, that all fungal isolates tested were pathogenic to seeds and seedlings of Brassica spp. with Brassica chinensis being more susceptible than B. rapa. Macrophomina phaseolina is reported as a pathogen of Brassica spp. for the first time.


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Additional Metadata

Item Type: Article
Divisions: Universiti Pertanian Malaysia
Faculty of Science and Environmental Studies
Publisher: Ministry of Agriculture
Keywords: Seeds; Fungi; Pathogenic
Depositing User: Azhar Abdul Rahman
Date Deposited: 12 Aug 2015 04:52
Last Modified: 12 Aug 2015 04:52
URI: http://psasir.upm.edu.my/id/eprint/39011
Statistic Details: View Download Statistic

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