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.
The black beanfly was known as Aphis rumicus L. until the studies of Börner and Janisch began in 1915. They distinguished 9 spp. with little morphological difference but with great biological differences. The group were of great economic importance because of direct damage through sucking and because of indirect damage by virus transfer.A new method was used for rapid preparation of microscopic slides. The studies confirmed the observations of Börner and Janisch. The group was enlarged to 11 spp. The spp. differed in hair pattern and length, proportional length of antennal segments, distribution of lateral tubercles and of secondary rhinaria, habit of the hind tibia of oviparous types and winged or wingless habit of the male. Attempts at infestation with pure colonies showed great differences in host range. The most important sp. was A. faba Scop., which overwintered on Euonymus spp., especially E. europeus L., and also on Deutzia crenata Sieb. & Z ucc., Philadelphus coronarius L and Viburnum opulus L. In spring the blackfly migrated to such plants as broad, French or dwarf bean and beet. Other species were A. cardui L., A. viburni Scop. (em. CB), A. ilicis Kalt., A. rumicis L. (em. CB), A. hederae Kalt. (em. v. d. Goot & Franssen), A. euonymi Fabr. (em. CB), A. mordwilkoi B. & L, A. philadelphi CB, A. podagrariae Schrank and A. börneri Franssen.
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