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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 104701
Title Partial resistance of tomatoes against Phytophthora infestans, the late blight fungus
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L.J. Turkensteen
Author(s) Turkensteen, L.J.
Publisher Wageningen : Pudoc
Publication year 1973
Description 88 p
Notes Proefschrift Wageningen  show all notes
Ook verschenen als handelsuitgave
Ook verschenen als handelsuitgave
ISBN 9022004988
Tutors Zadoks, Prof. Dr. J.C.
Graduation date 1973-11-09
Dissertation no. 568
Author abstract show abstract

In the Netherlands, the source of inoculum of the late blight fungus on tomatoes is the late blight fungus on potato crops. In regions of Europe mentioned, where tomatoes are grown in the open, P. infestans on tomatoes is the main source of inoculum. Especially in Bulgaria and Hungary, the effect of year-round cropping of tomatoes on prevalence and severity of the disease is obvious.

In field and laboratory experiments, the pathogenicity to tomatoes of P. infestans originating from potatoes can be increased by serial passages through tomato foliage. In Europe, no other hosts than potatoes and tomatoes played a role in the tomato late blight epidemidogy. Phacelia tanacetifolia is added to the host list of the fungus. For the purpose of genetics classification, two laboratory methods, probit - log dosage analysis and components analysis, and one field method have been developed to assess the resistance of tomatoes against P.infestans.

In particular the components infection ratio, lesion extension and sporulation intensity were studied. In the field method, the 'apparent infection rate' r was used. For breeding purposes, a simplified field method was indicated. A comparison of the three methods was made.

The resistance of tomatoes increased considerably until at least 8 weeks after seeding. Partial resistance of W.Va 700 against the 1-t-pathotype of P.infestans is based on a single gene, here named Ph 2 .

Online full textINTERNET
On paper FORUM ; STACKS ; NN08200,568
FORUM ; STACKS ; NN08202,568
Keyword(s) (cab) plant pathogenic fungi / solanum lycopersicum / tomatoes / phytophthora / plants / pest resistance / disease resistance / partial resistance
Categories Epidemiology of Plant Pests and Diseases / Vegetables
Publication type PhD thesis
Language English
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