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.
Studies were conducted to determine some of the physical and biological properties of a new strain of virus Y, called virus Y N. Different methods of preserving the virus in vitro and conditions affecting local lesion formation on detached leaves of the test plants Solanum demissum hybrid ' A6 ' and Solanum demissum 'Y' were studied. It was shown that detached leaves of these test plants produced also local lesions after inoculation with the potato viruses Y 0, Y C, A, 'aucubabont,' and with rattle and tobacco mosaic viruses. The effect of temperature on lesion formation was more obvious than the effect of light. The optimum incubation temperatures for virus Y and A were 24°-25°C and 19°-20°C, respectively. The suitability of the host ' A6 ' as a test plant for virus Y Nwas studied with infected potato plants at different stages of development. In leaves and parts of stems of plants with secondary infection, virus Y Nwas detected reliably. In tubers of those plants, virus Y Ncould reliably be detected directly after early harvesting with cut tubers as inoculum. In young tubers of primarily infected plants virus Y Ncould be detected shortly after harvesting if the period between inoculation and lifting was long. In tubers stored for a long period after harvesting, the virus could not reliably be detected. Testing the sprouts of the tubers for the presence of virus Y Nwas alway consistent.
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