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 104547
Title Onderzoekingen over het optreden en de bestrijding van valse meeldauw (Peronospora destructor) bij uien
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door A.M. van Doorn
Author(s) Doorn, A.M. van
Publisher Wageningen : Veenman
Publication year 1959
Description VIII, 63 p ill
Series title Mededeling / Instituut voor Plantenziektenkundig Onderzoek (210)
Notes Ook versch. in Tijdschrift over Plantenziekten 65(1959)6  show all notes
Proefschrift Wageningen
Tutors Oort, Prof. Dr. A.J.P.
Graduation date 1959-12-16
Dissertation no. 271
Author abstract show abstract
The life cycle of Peronospora destructor (Berk.) Casp. was spore - infection - overwintering - new spore. Wind-borne spores infected leaves and seed stalks of the onion. After replanting bulbs of an infected crop in the following year, mycelium may sometimes spread into the developing leaves and cause systemic symptoms. If the weather were favourable, spores would infect leaves of the surrounding crops. The rate of development of the disease was dependent on weather, source of infection, variety and leaf density.

In laboratory experiments relative humidity was most important for the progress of the infection cycle. In field experiments characteristics of weather favourable for infection were derived from 4 circular experimental fields. Data on overall climate collected 2.2 metres above ground gave an adequate forecast of days critical for infection by downy mildew.

Infection could be reduced by cultivation, hygiene and chemical control. The best results were obtained with low-volume spraying of zineb, once every 7-10 days, at the rate of 3 kg in 150-200 litres water per ha.

Online full textINTERNET
On paper FORUM ; STACKS ; NN08202,271
FORUM ; STACKS ; NN04870,0210
FORUM ; STACKS ; NN02599,65,6
Keyword(s) (cab) plant pathogenic fungi / allium cepa / onions
Categories Root Vegetables / Plant Pathogenic Fungi
Publication type PhD thesis
Language Dutch; Flemish
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