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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 104201
Title Natural control in cabbage root fly populations and influence of chemicals
show extra info.
I.K. Abu Yaman
Author(s) Abu Yaman, I.K.
Publisher Wageningen : Veenman
Publication year 1960
Description VIII, 57 p ill
Notes Proefschrift Wageningen
Ook verschenen als handelsuitgave
Tutors Wilde, Prof. Dr. J. de
Graduation date 1960-02-05
Dissertation no. 274
Author abstract show abstract
To facilitate studies on the natural and chemical control of Hylemya (Erioischia) brassicae (Bch.) in Holland, the bionomics and abundance of the Anthomyiid were investigated in 1959-9 in fields in which cauliflower was grown. The numbers of eggs and larvae were estimated by scrutiny of soil samples and emergence of adults was observed with soil traps. In 1955, the numbers of eggs laid by each of the three succeeding generations increased, but in the 1956-59 they decreased; in 1955, 1957 and 1959, larvae and pupae of the first generation were more abundant than those of the second, but in the intervening years the reverse occurred.

The numbers of adults emerging decreased towards the end of each season, through increase in the proportion of pupae that entered diapause or were parasitized. Mortality was high in larvae, and less than 10 % of the eggs gave rise to pupae. Aleochara bilineata Gylh. and Trybliographa (Cothonaspis) rapae (Westw.) caused 5.5-38 % mortality and miscellaneous insect predators 17 %; mortality in newly hatched larvae was 78-79.5 %, mainly through failure to become established on mature plants. Damage to the plant was determined both by density of larvae, and by the state of the crop; it was greatest in cool weather, which increased the fecundity of the flies and reduced plant growth. Reduction in the numbers of larvae by treatment of the plant base with insecticides, particularly aldrin and chlordane, was associated with a decrease in those of A. bilineata and miscellaneous predators, but it was not established whether this was due directly to insecticides or to the scarcity of H. brassicae.

Online full textINTERNET
On paper FORUM ; STACKS ; NN08202,274
Keyword(s) (cab) insects / plant pests / cabbages / anthomyiidae / muscidae / drosophilidae / calliphoridae / agromyzidae / tachinidae / glossinidae / tephritidae / plant protection / insecticides / acaricides / molluscicides / schizophora
Categories Agricultural Entomology / Plant and Crop Protection (General)
Publication type PhD thesis
Language English
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