Library Catalogue

Library Catalogue

  • external user (warningwarning)
  • Log in as
  • About the Catalogue

    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 104420
Title Studies on the plant parasitic nematode Tylenchorhynchus dubius
show extra info.
door Ravi Datt Sharma
Author(s) Sharma, R.D.
Publisher Wageningen : Veenman
Publication year 1971
Description 154 p
Series title Mededeling / Laboratorium voor Nematologie (83)
Notes Proefschrift Wageningen
Ook verschenen als handelsuitgave
Tutors Wilde, Prof. Dr. J. de
Graduation date 1971-01-22
Dissertation no. 479
Author abstract show abstract

By means of investigations in the laboratory, in greenhouses and in the field the author collected data on the biology, population dynamics and economic importance of Tylenchorhynchus dubius, the most common of the nematode species that live ectoparasitically on the roots of higher plants in sandy soils in the Netherlands and neighbouring countries.

After reviewing the literature and the methods used the author devoted some chapters to multiplication, development and growth, ecology, the field population and the damage to plants.

The study of the life cycle comprised observations and experiments on copulation, egg-stage, first larval moult in the egg, the emergence of the L 2 , the development and morphology of the larval and adult stages and the morphological variation of the latter. The life cycle could be followed fairly completely; it was found to take 40-48 days. The data are fixed in Tables 1-3, photographs and drawings (Figs. 1, 2, 5-12), and in a documentary film.

As to ecology and behaviour, the following aspects were studied: movement, feeding, host plants, survival with and without host plants, influence of the physical environment and of the biotic environment in the soil.

The observations and experiments are represented in Table 4-27 and Fig. 13-41. They give a picture of the biology of the nematode in relation to its environment, which is now more fully documented than that of the other ectoparasitic nematode species so far.

The field research was done chiefly on a population in the garden of the Plant Protection Service, and supplemented by pot experiments. During five years the author studied effects on host plants, density and distribution in the soil, and seasonal population fluctuations in relation with physical and biotic factors. The results are summarized in Tables 28-31 and Figs. 42-52.

Inoculation experiments and observations on damage showed, that, apart from discoloration of cortical cells, Tylenchorhynchus dubius does not produce conspicuous symptoms of the roots. The infestation results in growth decrease, e.g. in English rye-grass, wheat and turnip, but also in cotton, millet and other tropical crops. In combination with Phoma medicaginis, T. dubius induces black stem foot disease in peas which is not produced by either of these organisms separately (Table 32-35, Fig. 53-56). The fact, that this nematode is widely found in densities judged harmful, indicates that it is economically important and that attention should be given to its control.

Online full textINTERNET
On paper FORUM ; STACKS ; NN08200,479
FORUM ; STACKS ; NN08202,479
Keyword(s) (cab) plant pests / soil / nematoda / pratylenchus / heteroderidae / tylenchidae / tylenchorhynchus
Categories Plant Parasitic Nematodes
Publication type PhD thesis
Language English
There are no comments yet. You can post the first one!
Post a comment

To support researchers to publish their research Open Access, deals have been negotiated with various publishers. Depending on the deal, a discount is provided for the author on the Article Processing Charges that need to be paid by the author to publish an article Open Access. A discount of 100% means that (after approval) the author does not have to pay Article Processing Charges.

For the approval of an Open Access deal for an article, the corresponding author of this article must be affiliated with Wageningen University & Research.

Please log in to use this service. Login as Wageningen University & Research user or guest user in upper right hand corner of this page.