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 104376
Title Een studie over emelten en hare bestrijding
show extra info.
door Willem Hendrik de Jong
Author(s) Jong, W.H. de
Publisher Wageningen : Veenman
Publication year 1925
Description 108 p.
Series title Verslagen en mededeelingen van den Plantenziektenkundigen Dienst te Wageningen (no. 42)
Notes Proefschrift Wageningen
Tutors Roepke, Prof. Dr. W.K.J.
Graduation date 1925-11-27
Dissertation no. 20
Author abstract show abstract
After a survey of the literature since 1602 on leather-jackets in agriculture, systematic and biological features are discussed of species important for the Netherlands. Next follow questions of more direct agricultural importance. The excreta and the intestinal content could not derive much from humic sand, as microscopical scrutiny showed little silica in the gut. Leather-jackets would only eat humic sand if food was scarce. Living or dead plant material was their food. Although attacking many plants, they sometimes showed preference, as for white clover over grass. The author observed more injuries on stalks and leaves above or just under the soil surface than on roots.

The larvae attacked practically all Gramineae, many field and garden crops (incl. flowers) and sometimes seedling trees. The adult crane-fly however preferred grass and clover land, and there laid its eggs, so that meadows were most attacked. The larvae were hardly harmful during their first instars, considerably harmful in the 3rd instar, and most in the 4th (usually in spring). The larvae of Tipula maculata, T. vernalis and of the T. oleracea-group pupated by the beginning of May but those of T. paludosa still fed in May, June or even in July. Feeding stopped 8 to 14 days before pupation. The intestinal canal then largely emptied. After a discussion of influences on the numbers of leather-jackets, control measures are critically reviewed.

Online full textINTERNET
On paper FORUM ; SPEC.COLL. ; A2096,1925,7
FORUM ; STACKS ; NN08282,20
Keyword(s) (cab) insects / plant pests / culicidae / chironomidae / cecidomyiidae / animal physiology / plant protection / pest control / disease control / tipulidae / nematocera
Categories Agricultural Entomology
Publication type PhD thesis
Language Dutch; Flemish
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