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.
Diagnosis of sharka could be improved by distinguishing specific and unspecific symptoms. Two types of discoloration (broad red bands and thin red rings and lines) were specific, whereas the grooves and pits were not. Light and electron microscopy revealed the presence of nuclear and cytoplasmic inclusions in infected tissues. The cytoplasmic inclusions (bundles of needles) in plum fruits were reliable for diagnosis.From the known herbaceous test plants Chenopodium foetidum and Nicotiana clevelandii, only C. foetidum was useful for diagnosis. Ranunculus arvensis and Nicandra physaloides were presented as possible new test plants.Sixty herbaceous plant species were described as host of sharka virus. Some common weeds became systemically infected upon inoculation and may play a role in epidemiology of the virus.Purified sharka virus was used to prepare antisera. Some properties of the virus were described.
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