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 104216
Title Persistence of DDT and parathion residues on a plant surface as influenced by weather factors
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by H.S.M. Fahmy
Author(s) Fahmy, H.S.M.
Publisher Wageningen : Veenman
Publication year 1961
Description VIII, 64 p ill
Notes Proefschrift Wageningen
Ook verschenen als handelsuitgave
Tutors Wilde, Prof. Dr. J. de
Graduation date 1961-07-05
Dissertation no. 309
Author abstract show abstract
The decay of DDT and parathion deposits under the influence of temperature, rain and ultraviolet radiation was described. Temperature and solar radiation were the main factors limiting the residual effect. High mean temperatures were more important than high maxima.

DDT residues were more persistent than parathion residues. A fraction of the parathion residue persisted for many days indicating the presence of parathion inside leaf tissues.

In the laboratory at high temperatures losses mainly occurred within the initial period of exposure; at moderate temperatures initial losses were much less but continued at a higher level over a longer period. Parathion residues were more temperature-sensitive than DDT residues.

DDT deposits showed a linear decrease with rain; the parathion residues decreased geometrically at first, then slowly. Losses were not proportional to rainfall.

Ultraviolet radiation was very effective in reducing the DDT and the parathion residue within a few hours. Moistening generally had a protective effect against radiation.

Online full textINTERNET
On paper FORUM ; STACKS ; 303C76
Keyword(s) (cab) plant protection / insecticides / acaricides / molluscicides / toxicology / pesticides / pesticide residues / persistence
Categories Chemical Control / Environmental Toxicology, Ecotoxicology
Publication type PhD thesis
Language English
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