Staff Publications

Staff Publications

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    'Staff publications' is the digital repository of Wageningen University & Research

    'Staff publications' contains references to publications authored by Wageningen University staff from 1976 onward.

    Publications authored by the staff of the Research Institutes are available from 1995 onwards.

    Full text documents are added when available. The database is updated daily and currently holds about 240,000 items, of which 72,000 in open access.

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From dairy farmers to entrepreneurs
Grobben, Tom ; Timmer, Ruud ; Savelkoul, Huub ; Jong, Jannet de; Schober, Gitte - \ 2017
Hydro-geomorphology shapes fish abundance in the Lower Volga floodplain
Gorski, K. ; Buijse, A.D. ; Winter, H.V. ; Leeuw, J.J. de; Compton, T.J. ; Vekhov, D.A. ; Zolotarev, D.V. ; Verreth, J.A.J. ; Nagelkerke, L.A.J. - \ 2011
In: International Conference on the Status and Future of the World's Large Rivers, , Vienna, Austria, 11-14 April 2011. - Vienna, Austria : Tribun EU - p. 249 - 249.
Flood dynamics and fish recruitment in a large scale temperate floodplain
Gorski, K. ; Nagelkerke, L.A.J. ; Winter, H.V. ; Leeuw, J.J. de; Middelkoop, H. ; Buijse, A.D. - \ 2011
In: International conference on the Status and Future of the World's Large Rivers, Vienna, Austria, 11-14 April 2011. - Vienna, Austria : Tribun EU - p. 220 - 220.
Natural river floodplains provide key habitats for spawning and as a nursery for many riverine fish species. Periodic flooding plays a principal role in the ecological processes in floodplain systems resulting in high productivity and diversity, as formulated in the Flood Pulse concept (FPC). However, little progress has been made in exploring the FPC over larger spatial scales due to lack of empirical data. In this study we aimed at a quantitative assessment of the FPC by analyzing flood pulse dynamics in response to changes in river flow regime on various spatial and temporal scales and relating these to recruitment success of riverine fish species that use the floodplain. This assessment is based on analysis of environmental as well as fish data (for consecutive life stages; adult spawners, fish larvae, young fish at the end of growing season) collected in 2006-2008. We confirm that flooding coupled with suitable temperatures is essential for spawning, nursery and resulting recruitment of fish species that use the floodplain, as hypothesized in the FPC. The match between species-specific environmental requirements for spawning and growing with the environmental conditions occurring during a specific year in terms of timing, duration and magnitude of the flood pulse and water temperature, results in ‘opportunity windows’ which are suitable for spawning or growth of young fish of a particular species. However, since different fish species in the floodplain have different lifehistory strategies, this results in complex and diverse recruitment responses. In this study the potential for fish recruitment, depending on floodplain topography, flood pulse magnitude and other environmental factors in the Volga-Akhtuba are discussed in the scope of the ‘opportunity windows’ concept. In addition, implications for management are considered, in order to sustain successful fish recruitment in temperate floodplains.
Farming in Europe
Ederer, P. ; Schober, B.M. ; Walliker, C. - \ 2005
Wageningen : Wageningen University - 30 p.
Twee weten meer dan een
Schober, Gitte - \ 2005
Twee weten meer dan een : Eindrapportage
Schober, B.M. ; Wertheim-Heck, S.C.O. ; Oosterkamp, E.B. ; Velzen, V.N.H. van; Gerretsen, J.J.A. - \ 2005
Wageningen : Wageningen Business School / Praktijkonderzoek Plant & Omgeving / LEI - 13
biologische landbouw - biologische voedingsmiddelen - consumenten - marketingkanalen - samenwerking - gegevens verzamelen - ketenmanagement - kennismanagement - organic farming - organic foods - consumers - marketing channels - cooperation - data collection - supply chain management - knowledge management
Het AKK project Twee Weten Meer Dan Een wil de belangrijkste kennisthema’s en bijbehorende doelgroepen in biologische afzetketens identificeren en nagaan welke kennisverspreidingsactiviteiten, zowel binnen de projecten als binnen de biologische keten het meeste effect hebben. Behoefte en interesse vanuit de biologische sector voor de onderwerpen moet hierin centraal staan. In een eerste behoeftepeiling is met deskresearch en bij projectparticipanten, belangenbehartigers en bedrijven uit de biologische keten de kennisbehoefte geïnventariseerd. Welke kennis is anno 2003/2004 interessant en belangrijk, welke thema’s achten zij actueel voor de biologische keten en hoe vergaren ze bij voorkeur deze kennis? Deze behoeftepeiling heeft drie centrale thema’s geïdentificeerd: 1. Thema Consument: Meerwaarde biologisch en consumentenbehoeften (hoe aansluiting te vinden bij de behoeften van consumenten en aan te spreken op het moment van aankoop): communicatie in de keten! 2. Thema Kwaliteit: Ketenbeheersing van Kwaliteit 3. Thema Samenwerking: Proceskennis voor samenwerking in de keten
Enzymatic maceration of witloof chicory by the softrot bacteria Erwinia carotovora subsp. carotovora : the effect of nitrogen and calcium treatments of the plant on pectic enzyme production and disease development
Schober, B.M. ; Vermeulen, T. - \ 1999
European Journal of Plant Pathology 105 (1999). - ISSN 0929-1873 - p. 341 - 349.
Survival of softrot bacteria during the storage of witloof chicory roots
Schober, B.M. ; Zadoks, J.C. - \ 1999
Journal of Phytopathology 147 (1999). - ISSN 0931-1785 - p. 461 - 466.
Water and temperature relations of softrot bacteria : growth and disease development
Schober, B.M. ; Zadoks, J.C. - \ 1999
Annals of Applied Biology 134 (1999). - ISSN 0003-4746 - p. 59 - 64.
Natrot in witlof beheersbaar
Schober, B.M. - \ 1998
PAV-bulletin. Vollegrondsgroenteteelt / Praktijkonderzoek voor de Akkerbouw en de Vollegrondsgroenteteelt 2 (1998)4. - ISSN 1385-5298 - p. 24 - 26.
cichorei - plantenziekteverwekkende bacteriën - pectobacterium carotovorum - pseudomonas marginalis - voetrot - gewasbescherming - onderzoek - chicory - plant pathogenic bacteria - foot rot - plant protection - research
In een onderzoek is een aantal beheersmaatregelen ter beperking ter berperking van natrot nader uitgewerkt. Verder is gewerkt aan een toets om het risico op natrot bij gerooide wortels in te kunnen schatten
Bacterieel natrot in witlof.
Schober, B.M. ; Zadoks, J.C. - \ 1998
Gewasbescherming 29 (1998). - ISSN 0166-6495 - p. 44 - 44.
Development of populations of softrot bacteria on witloof chicory leaves during root production in the field.
Schober, B.M. ; Zadoks, J.C. - \ 1998
Journal of Phytopathology 146 (1998). - ISSN 0931-1785 - p. 631 - 636.
A study on bacterial softrot in witloof chicory
Schober, B.M. - \ 1998
Agricultural University. Promotor(en): J.C. Zadoks. - S.l. : S.n. - ISBN 9789054859420 - 115
cichorium intybus - cichorei - plantenziekteverwekkende bacteriën - plantenziekten - pectobacterium carotovorum subsp. carotovorum - pseudomonas marginalis - chicory - plant pathogenic bacteria - plant diseases
<p>The production process of witloof chicory, which consists of the root production stage, the storage of the roots and the forcing of the chicory heads, was monitored for the presence of softrot bacteria. In the Netherlands, bacterial softrot in chicory is caused by <em>Erwinia carotovora</em> subsp <em>. carotovora</em> ( <em>Ecc</em> ) and <em></em><em>Pseudomonas marginalis</em> .</p><p>Populations of these species colonised the chicory leaves during the root production stage causing softrot only in the forcing stage. The colonisation incidence, the number of populations of both pathogens present on the chicory leaves, increased during the root production. <em>Ecc</em> was inhibited by high radiation levels during the first months of the growing season of the plants. The colonisation incidence of the chicory leaves was influenced by the average temperature throughout the growing season but not by nitrogen fertilisation of the crop or rainfall. The colonisation incidence of the stored roots decreased from harvest time in September until December but increased thereafter. High colonisation incidences during storage coincided with high disease incidence during the subsequent forcing period of the roots.</p><p>Bacterial softrot occurred during forcing of the roots in all three forcing seasons. Nitrogen fertilisation of the plants, root immersion with calciumchloride and the sampling year had significant effects on disease incidence. Aggregation of diseased chicory heads in forcing trays could be described by an aggregation parameter of the beta-binomial distribution. Studies on the enzyme activity of the softrot bacteria showed that nitrogen and calcium effects on disease severity could be explained by the influence of these treatments on the activity of two pectolytic enzymes of the bacteria. Reduction of bacterial softrot is possible by reduced nitrogen fertilisation during root production and by application of calciumchloride to harvested roots.</p>
Detection and enumeration of Erwinia carotovora subsp. atroseptica using spiral plating and immunofluorescence colony staining.
Schober, B.M. ; Vuurde, J.W.L. van - \ 1997
Canadian Journal of Microbiology 43 (1997). - ISSN 0008-4166 - p. 847 - 853.
Monitoring population dynamics of Erwinia carotovora subsp. Atroseptica (eCA) and other softrot bacteria in the storage of witloof chocory roots.
Schober, B.M. ; Zadoks, J.C. - \ 1997
Unknown Publisher
Survival of softrot bacteria during the storage of chicory roots.
Schober, B.M. ; Zadoks, J.C. - \ 1997
Phytopathology 87 (1997)6. - ISSN 0031-949X - p. Suppl. - Suppl..
Fruitvlieg overbrenger van natrot.
Boers, J. ; Schober, B.M. - \ 1996
In: Witlof nieuwsbrief 1 - p. 2 - 2.
Natrot in wiltof; handreikingen ter beperking.
Schober, B.M. - \ 1996
In: Gewasmiddag Witlof PAGV - p. 34 - 40.
Bacterieel natrot in witlof.
Schober, B.M. ; Kruistum, G. van; Ruissen, M.A. - \ 1995
In: Proceedings Witlofsymposium 22 september - p. 76 - 83.
The role of pectic enzymes in the pathogenesis of bacterial soft rot in witloof chicory.
Schober, G. ; Ruissen, T. - \ 1995
In: Abstracts 5th Int. Conf. Pseudomonas syringae pathovars and related pathogens, Berlin, Germany - p. 73 - 73.
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