Library Catalogue

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 104383
Title A contribution to the knowledge of Spongospora subterranea (Wallr.) Lagerh., the cause of powdery scab of potatoes
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door Arie Pieter Kole
Author(s) Kole, A.P.
Publisher Wageningen : Veenman
Publication year 1954
Description 66 p.
Notes Ook versch. in Tijdschrift over Plantenziekten, 60(1), 1954  show all notes
Proefschrift Wageningen
Tutors Oort, Prof. Dr. A.J.P.
Graduation date 1954-01-27
Dissertation no. 183
Author abstract show abstract
After a brief general introduction, the first part of this exhaustive study of powdery scab (Spongospora subterranea) deals with the morphology, cytology and life history of the fungus. In the Netherlands the disease was largely restricted to the sands and sandy peats of the north-east, where it was not severe except in very wet seasons. The life cycle was similar to that of related genera. Fusions of zoospores proved to be purely vegetative. Infection of tubers had 2 phases: penetration and necrosis of invaded cells; and the formation of warts by stimulation of cell division. Formation of warts was ultimately arrested by the formation of a wound periderm under the site of infection, but the fungus may already have spread through surrounding epidermal tissue, causing dry rot.

The second part deals with the relationships between environment and infection. Resting spores germinated more rapidly if dried and apparently only in the presence of host roots. In air-dry soil resting spores survived 56 days at -24°C. Minimum, optimum and maximum temperatures for infection of roothairs were below 11°, 14°- 20°, and 22°-25°, respectively. Between pH values of 5.2 and 7.5, soil pH had hardly any influence on invasion of root-hairs. At 16° to 20° the incubation period for tuber and root infection was less than 3 weeks.

Online full textINTERNET
On paper FORUM ; STACKS ; 294E26
FORUM ; STACKS ; NN08202,183
Keyword(s) (cab) plant pathogenic fungi / solanum tuberosum / potatoes
Categories Plant Pathogenic Fungi
Publication type PhD thesis
Language English
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