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A Study of the Seed-Borne Fungal Flora of New Zealand Seed Oats, with Particular Reference to the Pathogens

dc.contributor.authorTickle, John Hedley
dc.date.accessioned2009-04-07T00:01:33Z
dc.date.accessioned2022-10-17T20:56:11Z
dc.date.available2009-04-07T00:01:33Z
dc.date.available2022-10-17T20:56:11Z
dc.date.copyright1967
dc.date.issued1967
dc.description.abstractThe seed-borne fungal flora of fifty-two samples of New Zealand seed oats was studied. Five methods were employed for detecting the fungi present, the Ulster, Filter Paper, Heat Treatment (one hour at 100°C), Surface Sterilization (10 minutes in a solution of 2% available chlorine) and Seed Washing Methods. Forty-nine fungi belonging to thirty-seven genera were identified. Alternaria tenuis auct., Cladosporium spp. and Epicoccum nigrum (Link) Schol-Schwarz, all considered to be non-pathogens, were the most frequently isolated. Forty-one samples were infected with the pathogen Helminthosporium avenae Eidam, and twenty-four samples with Fusarium spp., mostly F. poae (Peck) Wollenweber. Algerian oats were found to be more heavily infected with H. avenae than Onward oats. The percentage of seeds shown by plate methods to be contaminated with Penicillium spp. increased with the age of the seed while the percentage of A. tenuis decreased. Of the culture plate methods studied, the Ulster and Heat Treatment methods were the most efficient for detecting H. avenae; the Heat Treatment method was preferred because it allowed easier counting of colonies. Thirteen fungi are described: five species of Helminthosporium: H. avenae, H. sativum Pamm., King & Bakke, H. cyclops Drechs., H. biforme Mason & Hughes, and H. tetramera McKinney; four of Fusarium, F. avenaceum (Fr.) Sacc., F. culmorum (W. G. Sm.) Sacc., F. poae and Fusarium sp.; and one each of Cephalosporium, Pellicularia, Pestalotia and Phoma.en_NZ
dc.formatpdfen_NZ
dc.identifier.urihttps://ir.wgtn.ac.nz/handle/123456789/22056
dc.languageen_NZ
dc.language.isoen_NZ
dc.publisherTe Herenga Waka—Victoria University of Wellingtonen_NZ
dc.subjectPathogenic fungi
dc.subjectOats -- Disease and pest resistance
dc.subjectPhytopathogenic fungi
dc.titleA Study of the Seed-Borne Fungal Flora of New Zealand Seed Oats, with Particular Reference to the Pathogensen_NZ
dc.typeTexten_NZ
thesis.degree.disciplineBotanyen_NZ
thesis.degree.grantorTe Herenga Waka—Victoria University of Wellingtonen_NZ
thesis.degree.levelMastersen_NZ
thesis.degree.nameMaster of Scienceen_NZ
vuwschema.type.vuwAwarded Research Masters Thesisen_NZ

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