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Library Catalogue

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    Union Catalogue of Agricultural Libraries in the Netherlands

    The WUR Library Catalogue contains bibliographic data on books and periodicals held by the libraries of Wageningen University and Research Centre and some 15 associated libraries. Holding data are added to each record.

    Subjects covered include Agrotechnology, Food and Food Production, Plant and Animal Sciences, Soil Science, Geo-information, Landscape and Spatial Planning, Water and Climate, Ecosystem Studies, Economics and Society.

    The joint collections of the participating libraries cover a substantial part of the internationally available scientific literature in these disciplines.

    As far as Dutch scientific literature in these fields is concerned, coverage can be considered near 100%, including much of the so-called "grey literature".

    All titles are entered in their original language. Keywords are added to facilitate subject searching.

    The database is updated every day and now contains over 830.000 records.

Record number 104584
Title Inwendige ontsmetting van door Ascochyta pisi aangetaste erwtezaden met de antibiotica rimocidine en pimaricine, benevens enkele aspecten van het parasitisme van deze schimmel
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door Johannes Dekker
Author(s) Dekker, J.
Publisher Wageningen : Veenman
Publication year 1957
Description VIII, 80 p
Series title Mededeling / Laboratorium voor Fytopathologie (170)
Notes Ook versch. in Tijdschrift over Plantenziekten 63(1957)3  show all notes
Proefschrift Wageningen
Tutors Oort, Prof. Dr. A.J.P.
Graduation date 1957-06-14
Dissertation no. 227
Author abstract show abstract
One of the plant diseases, which is still difficult to control, is leaf, stem and pod spot of peas, caused by the fungus Ascochyta pisi. Seed disinfection is unsatisfactory, because the fungus may penetrate deep into the seed, beyond the reach of superficially active disinfectants. Therefore a search was made for disinfectants, penetrating the seeds, using ascochyta-infected seeds for tests. The most effective compounds were the newly discovered antibiotics rimocidin and pimaricin, products of Streptomyces spp. They penetrated the seeds and eliminated internal fungus without impairing germination. An 18-h soaking reduced the percentage of seeds with viable mycelium from 80 to less than 1 %. Dry or almost dry treatment was less effective. A further drawback of these antibiotics was the reversible loss of fungicidal activity inside plant tissue through adsorption, and inactivation by UV radiation.

Rimocidin and pimaricin were nevertheless of interest because of their selectivity, being highly toxic to most fungi, but hardly toxic to bacteria and higher plants. Remarkable also was ready uptake by plants and seeds despite their large complex molecules.

A new aspect of the parasitism of this fungus was that the fungus was often present in plant parts or whole plants without symptoms. Rarely the fungus was even isolated from seeds, harvested from plants without symptoms. It was also observed that during ripening of the pods many pycnidia appeared outside the limited brown-edged spots, typical for this disease.

Online full textINTERNET
On paper FORUM ; STACKS ; 1298C14
FORUM ; STACKS ; NN08202,227
Keyword(s) (cab) plant pathogenic fungi / vicia / plant protection / fungicides / pezizomycotina / seed treatment / seeds / disinfection / immunology / antigens
Categories Plant Pathogenic Fungi / Protein Crops / Dry Beans
Publication type PhD thesis
Language Dutch; Flemish
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