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.

    We have a manual that explains all the features 

    Records 1 - 20 / 215

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    Mass trapping of the apple sawfly Hoplocampa testudinea
    Helsen, H.H.M. ; Jansonius, P.J. ; Brouwer, G.W. ; Sluis, B.J. van der; Tol, R.W.H.M. van; Groot, A.V. de; Kats, R.J.M. van; Maas, M.P. van der - \ 2020
    In: Proceedings of the Conference, 17-19 February 2020, Hohenheim, Germany. - - p. 99 - 102.
    19th International Conference on Organic Fruit Growing: Proceedings of the Conference, 17-19 February 2020, Hohenheim
    Red rust thrips in smallholder organic export banana in Latin America and the Caribbean : Pathways for control, compatible with organic certification
    Arias de López, M. ; Corozo-Ayovi, R.E. ; Delgado, R. ; Osorio, B. ; Moyón, D. ; Rengifo, D. ; Suárez, P. ; Paulino, A. ; Medrano, S. ; Sanchez, L. ; Rojas, J.C. ; Vegas, U. ; Alburqueque, D. ; Staver, C. ; Tol, R. van; Clercx, L. - \ 2020
    Acta Horticulturae 1272 (2020). - ISSN 0567-7572 - p. 153 - 161.
    Bio-insecticides - Biological control of thrips - Organic banana

    Since 2010, red rust thrips (RRT) have become a serious pest in organic export banana plantations, causing yield losses of 30-40%. Although RRT blemishes on banana peel are only cosmetic, exporters apply zero tolerance. During 2014-2017, FONTAGRO co-financed studies on measures to reduce RRT damage in smallholder organic export banana. Research was initially guided by an IPM approach based on thrips population thresholds and linked abiotic factors, in order to schedule practices. Initial studies resulted in a preventive model for thrips management based on the year-round use of transparent bags with 3-mm orifices to protect bunches just as the bell emerges and before bracts open. This approach minimizes losses due to both Chaetanaphothrips signipennis found in Peru and Ecuador and Chaetanaphothrips orchidii common in the Dominican Republic. Experiments to develop scouting methods and establish thresholds suggested three conclusions: C. signipennnis flies very little, complicating trapping even with pheromones; thresholds for economic damage are very low; and scouting is difficult, costly and not practical for decision making. Routine monitoring of losses caused by RRT and other factors should be done during packing. Experiments to test the effectiveness of bagging and the use of applied products to repel or kill thrips showed that bagging alone reduced losses by 90-100% compared to bunches with no bag. Applications of organic products to the bell at bagging and the leaf whorl and the upper bunch stem simultaneously with other bunch practices reduced losses further by 0-8%. Studies of biological control identified predators, parasitoids and entomopathogens which attack different stages of thrips. Preliminary lab and release studies suggest that biological control should be further developed. However, RRT form part of a complex of insect bunch pests, and the use of general or targeted applications should be reviewed to avoid the use of products which reduce beneficial organisms.

    Development of a refuge-kairomone device for monitoring and control of the vine weevil, Otiorhynchus sulcatus, by lure-and-kill and lure-and-infect
    Tol, Robert W.H.M. van; Elberse, Ivonne A.M. ; Bruck, Denny J. - \ 2020
    Crop Protection 129 (2020). - ISSN 0261-2194
    Beauveria bassiana - Kairomone - Linseed oil - Lure and kill - Monitoring - Otiorhynchus sulcatus (fabricius) (Coleoptera: Curculionidae)

    Root weevils in the genus Otiorhynchus are an important pest in the nursery and small fruit production worldwide. The night-activity of the adult weevils obstruct timely monitoring and oviposition often starts before effective control measures are taken. The primary objective of this research goal was to develop an effective trap for monitoring that can be used in conjunction with the kairomone (Z)-2-pentenol and an effective means to kill the insects that enter the trap. A novel ruffle refuge trap (WeevilGrip) caught on average 4 to 5 times more weevils than a grooved board refuge in a field trial. Addition of the kairomone to the WeevilGrip further increased catches 52%. Linseed oil increased mortality to 59% and addition of Botanigard (ai Beauveria bassiana, strain GHA, Certis, BotaniGard WP 10–25%) increased mortality to 79%. The lure-refuge device consists of a flexible ruffle that can be wrapped around trees or placed on the soil within ground covers. This flexible shape maximizes contact with weevils compared to other available weevil trap designs. The WeevilGrip is an improved monitoring tool to support growers in integrated control strategies.

    Nieuwe mogelijkheden voor de bestrijding van trips in de sierteelt onder glas
    Messelink, Gerben J. ; Leman, Ada ; Holstein-Saj, Renata van; Tol, Rob van; Vijverberg, Roland ; Elfferich, Caroline ; Catalá Senent, Laura ; Huang, Tze-Yi ; Shresta, Kriti ; Kruidhof, Marjolein - \ 2019
    Bleiswijk : Wageningen University & Research, BU Glastuinbouw (Rapport / Stichting Wageningen Research, Wageningen Plant Research, Business unit Glastuinbouw GTB-895) - 90
    Western flower thrips, Frankliniella occidentalis, is a major pest species in greenhouse ornamental crops. They cause damage to leaves and flowers and can transmit viruses. Effective control requires a systems approach where measures that increase plant resilience are combined with biological control, mass trapping and (bio) pesticides. Het aim of this project with the title “Master plan thrips management in greenhouse ornamental crops” was to develop enhanced thrips control measures through 1) increased plant resilience with fungal endophytes, 2) preventive releases of natural enemies (standing army) and 3) manipulation of thrips behaviour. This report presents the results of this project that was done in the period 2015-2019.
    Luring pests with LED lamps
    Tol, Rob van - \ 2019
    Gele en blauwe vangplaten functioneren niet altijd optimaal
    Tol, Rob van - \ 2019

    Hoe zien Calofornische trips en de behaarde wants hun omgeving en hoe kan deze kennis worden ingezet om een beter zichtbare en aantrekkelijker val te creëren? Die vraag staat centraal in een onderzoek door Wageningen plant Research, met als doel de monitoring te verbeteren en meer plaaginsecten te kunnen wegvangen. De eerste onderzoeksresultaten tonen aan dat meer kennis over wat plaaginsecten daadwerkelijk zien inderdaad mogelijkheden biedt om efficiëntere vallen te ontwikkelen.

    In de ban van het licht: Rob van Tol maakt slimme vallen met led
    Tol, R.W.H.M. van - \ 2019
    Collectief onderzoek brengt nuttige informatie boven tafel
    Tol, R.W.H.M. van - \ 2018

    Met een nieuw contract getekend waarin de private en publieke middelen voor kennis en innovatie voor 2018 en 2019 zijn vastgelegd, leek het de Topsector T&U zinvol de oogst over 2017 te delen via een publicatie. Drie onderzoeken nader belicht. Voorbeelden die nodig zijn om aan de toekomsteisen te voldoen en de sector vitaal te houden.

    The development of attractants for monitoring and tools for biocontrol of the red rust thrips (C. signipennis)
    Tol, R.W.H.M. van; Dooremalen, J.A. van; Tom, Jolanda - \ 2018
    Report of FONTAGRO project “Strengthening small producers of organic bananas: integration of actors, sustainable pest management and strategies of health of soils”.
    Aanpak taxuskever
    Tol, R.W.H.M. van - \ 2018
    Tuin en Landschap (2018). - ISSN 0165-3350
    (n.a.v. KNPV dag)
    Verkenning toekomst gewasbescherming Beschermde Appelteelt
    Maas, M.P. van der; Helsen, H.H.M. ; Wenneker, M. ; Winkler, K. ; Jong, P.F. de; Tol, R.W.H.M. van; Groot, G.A. de; Lotz, L.A.P. ; Balkhoven, H. - \ 2018
    Beschermde appelteelt; Bestrijding van appelzaagwesp door wegvangen
    Helsen, H.H.M. ; Sluis, B.J. van der; Tol, R.W.H.M. van; Groot, G.A. de; Kats, R.J.M. van; Maas, M.P. van der - \ 2018
    - 2 p.
    Voor de bestrijding van appelzaagwesp (Hoplocampatestudinea) zijn fruittelers afhankelijk van chemische middelen. Verschillende van deze middelen staan op de EU lijst “Candidates forsubstitution” en zullen op termijn mogelijk verdwijnen. Voor de biologische teelt zijn in Nederland geen middelen voor de bestrijding van appelzaagwesp toegelaten. In het project Beschermde Teelt zoeken we daarom naar alternatieve, niet-chemische bestrijdingsmethoden.
    Looking through the eyes of thrips
    Tol, Rob van - \ 2018
    Catalyst workshop on vision of thrips
    Tol, Rob van - \ 2018
    Insecten in de tuin.
    Tol, Rob van - \ 2018
    Hoe ziet trips zijn omgeving?
    Tol, Rob van - \ 2018
    Kleuren, geuren en andere factoren die gedrag beïnvloeden. Titel: Kruip in de huid van trips De glastuinbouwsector worstelt al jaren met de bestrijding van trips. De laatste jaren zijn mooie resultaten behaald met biologische bestrijding, maar in diverse teelten zorgt trips nog voor grote problemen. In deze workshop willen we terug naar de basis en in de huid van trips kruipen. Hoe en wanneer vliegt trips? Hoe kijkt een trips? Welke geuren vinden ze lekker en welke niet? Hoe planten ze zich voort? Hoe gedraagt een trips zich op de plant? Onderzoekers Rob van Tol en Gerben Messelink van Wageningen University & Research nemen je mee in de wereld van trips en presenteren de meest recente kennis over het gedrag van trips. Meer basiskennis helpt om deze plaag gerichter en effectiever te bestrijden. De workshop zal starten met een interactieve tripsquiz om uw kennis over deze belangrijke plaag te testen. Deelnemers aan deze workshop worden aangeraden de app kahoot alvast te downloaden op mobiel of tablet.
    Resultaten 2017 tot januari 2018
    Tol, R.W.H.M. van - \ 2018
    Resultaten tot juni 2018
    Tol, R.W.H.M. van - \ 2018
    labproeven (trips/wantsen) en praktijkproeven 2018 (trips)
    Final DROPSA Project Meeting
    Tol, R.W.H.M. van - \ 2018
    Strategies to develop effective, innovative and practical approaches to protect major European fruit crops frompests and pathogens
    The use of Metabolomics to Elucidate Resistance Markers Against Damson-Hop Aphid
    Undas, Anna K. ; Weihrauch, Florian ; Lutz, Anton ; Tol, Rob van; Delatte, Thierry ; Verstappen, Francel ; Bouwmeester, Harro - \ 2018
    Journal of Chemical Ecology 44 (2018)7-8. - ISSN 0098-0331 - p. 711 - 726.
    Damson-hop aphid - Hop metabolites - Plant defense - Plant resistance - Untargeted metabolite profiling

    Phorodon humuli (Damson-hop aphid) is one of the major pests of hops in the northern hemisphere. It causes significant yield losses and reduces hop quality and economic value. Damson-hop aphid is currently controlled with insecticides, but the number of approved pesticides is steadily decreasing. In addition, the use of insecticides almost inevitably results in the development of resistant aphid genotypes. An integrated approach to pest management in hop cultivation is therefore badly needed in order to break this cycle and to prevent the selection of strains resistant to the few remaining registered insecticides. The backbone of such an integrated strategy is the breeding of hop cultivars that are resistant to Damson-hop aphid. However, up to date mechanisms of hops resistance towards Damson-hop aphids have not yet been unraveled. In the experiments presented here, we used metabolite profiling followed by multivariate analysis and show that metabolites responsible for hop aroma and flavor (sesquiterpenes) in the cones can also be found in the leaves, long before the hop cones develop, and may play a role in resistance against aphids. In addition, aphid feeding induced a change in the metabolome of all hop genotypes particularly an increase in a number of oxidized compounds, which suggests this may be part of a resistance mechanism.

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