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.

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    We will mail you new results for this query: wurpublikatie/titelbeschrijving/classificatie/trefwoord/cab/engels==biological control
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Kleine lieveheersbeestjes bieden perspectief tegen luizenprobleem: nuttig bij preventie van grote luisuitbraken
Messelink, Gerben - \ 2017
biological control - biological control agents - natural enemies - aphididae - greenhouse horticulture - sweet peppers - organic farming - propylea quatuordecimpunctata
Mothers in the woods: multitrophic interactions and oviposition preference in the bronze big Thaumastocoris pergrinus, a pest of Eucalyptus
Martínez, Gonzalo - \ 2017
University. Promotor(en): Marcel Dicke. - Wageningen : Wageningen University - ISBN 9789463436786 - 172
eucalyptus - forest plantations - forest pests - multitrophic interactions - biological control - hemiptera - oviposition - host plants - uruguay - insect plant relations - bosplantages - bosplagen - multitrofe interacties - biologische bestrijding - ovipositie - waardplanten - insect-plant relaties

The bronze bug is an important pest of Eucalyptus trees. Originally restricted to Australia, it has become an important pest of Eucalyptus plantations, colonizing in 15 years the major production areas worldwide. The aim of this thesis was to investigate the factors affecting the oviposition behavior of the bronze bug within a multitrophic system comprised of its host plant (Eucalyptus spp.), a common co-occurring sap-feeder (Glycaspis brimblecombei) and a specialist egg parasitoid (Cleruchoides noackae). I assessed the life parameters of this species in a newly developed rearing. Based on the preference-performance hypothesis, I tested the effects of host-plant quality, conspecifics, or the infestation by a potential competitor on preference-performance correlations of the bronze bug. The egg parasitoid (C. noackae) was introduced, reared, and released. Finally, I assessed host-selection behavior of the parasitoid, testing its responses towards different contact cues. The findings of this investigation provided new insights on the oviposition behavior by true bugs, and towards the development of management strategies for T. peregrinus.

Management of water hyacinth (Eichhornia crassipes [Mart.] Solms) using bioagents in the Rift Valley of Ethiopia
Gebregiorgis, Firehun Yirefu - \ 2017
University. Promotor(en): Paul Struik, co-promotor(en): Egbert Lantinga; Taye Tessema. - Wageningen : Wageningen University - ISBN 9789463430562 - 174
eichhornia crassipes - biological control agents - biological control - neochetina - curculionidae - mycoherbicides - ethiopia - organismen ingezet bij biologische bestrijding - biologische bestrijding - mycoherbiciden - ethiopië

This thesis presents a study on management of water hyacinth (Eichhornia crassipes [Mart.] Solms) using insects and fungal pathogens as bioagents. The main goal was to develop an effective biocontrol strategy for water hyacinth in the Rift Valley of Ethiopia. To this end, a field survey was conducted to assess the agro-ecological distribution of water hyacinth and of native fungal pathogens found in association with water hyacinth. We also performed laboratory and lath house experiments on (i) pathogenicity and host specificity of the fungal pathogens; (ii) adaptability, life table, efficacy and host specificity of the two Neochetina weevils; and (iii) the synergetic effects of integrated use of Neochetina weevils and fungal pathogen as bioagents. Survey results indicated that the weed is distributed in the Rift Valley water bodies located in low, mid and high altitude. The survey results also identified 25 fungal species found in association with water hyacinth that belonged to nine genera. Among the isolates, Alternaria alternata, A. tenuissima, and Alternaria spp. hold promise as possible bioagents of water hyacinth.

Laboratory study on life cycle and development of Neochetina weevils indicated the two weevils took shorter generation time in Ethiopia than in Argentina but relatively similar to Kenya and Uganda. In Ethiopia, the two weevils produced four generations per year indicating their successful establishment. Feeding by adult weevils and tunneling by larvae significantly impacted the vigour and reproduction of water hyacinth plants. A herbivory loads of three pairs of N. bruchi and two pairs of N. eichhorniae showed the highest level of leaf damage and defoliated petioles. The study also reinforced that the two weevils are sufficiently host-specific. Finally, a study on integrated use of Neochetina weevils and an indigenous plant pathogen revealed that the two Neochetina weevils and the fungus A. alternata were together able to reduce the vegetative growth and fresh weight of water hyacinth plants considerably.

This study recommends integrated use of fungal species and the two weevils to control water hyacinth. Implications of the findings are also discussed in the context of integrated water hyacinth management using the native fungal pathogens and the two weevils.

Fusarium is toenemend probleem in teelt van amaryllis : drie ziekteverwekkers en doorelkaar lopende symptomen
Kromwijk, Arca - \ 2016
fusarium - plant diseases - plant disease control - plant pathogens - plant protection - greenhouse horticulture - amaryllis - biological control
Geïntegreerde bestrijding van plagen in de sierteelt onder glas : een systeembenadering met preventieve biologische bestrijding als basis
Messelink, G.J. ; Leman, A. ; Ghasemzadeh Dizaji, Somaiyeh ; Bloemhard, C.M.J. ; Holstein, R. van; Vijverberg, Roland ; Muñoz-Cárdenos, Karen - \ 2016
Bleiswijk : WageningenUR Glastuinbouw (Rapport GTB 1420) - 98 p.
siergewassen - glastuinbouw - kasgewassen - rozen - chrysanten - alstroemeria - biologische bestrijding - organismen ingezet bij biologische bestrijding - geïntegreerde bestrijding - geïntegreerde plagenbestrijding - thrips - neoseiulus cucumeris - trialeurodes vaporariorum - aleyrodes - bemisia tabaci - amblyseius swirskii - euseius - iphiseius - roofmijten - orius - cryptolaemus montrouzieri - anagyrus pseudococci - planococcus citri - ornamental crops - greenhouse horticulture - greenhouse crops - roses - chrysanthemums - biological control - biological control agents - integrated control - integrated pest management - predatory mites
The control of greenhouse pests in ornamental crops is getting more difficult because of the decreasing number of available pesticides. Alternative methods of pest control, based on biopesticides and natural enemies is promising, but not yet robust and reliable enough. In this project we developed and evaluated several methods to enhance the biological control of western flower thrips, Echinothrips americanus, whiteflies and mealybugs. Most studies were focused on preventive control measures that promote the establishment and efficacy of natural enemies by using top layers, alternative food, artificial domatia and a banker plant system. Furthermore we studied the interaction between parasitoids and predatory beetles for curative control of mealybugs. Finally, a number of (bio)pesticides was evaluated for their potential use as a correction tool against western flower thrips.
Van chemie naar ecologie: niet straks maar nu!
Vet, Emely de - \ 2016
plant protection - pesticides - biological control - golf - agriculture - agri-environment schemes - ecosystems - biodiversity
'Van chemie naar ecologie. Niet straks maar nú!'
Vet, Emely de - \ 2016
golf - pesticides - agri-environment schemes - biological control - agriculture - plant protection - sports grounds - golf green soils - ecosystems - biodiversity - golf courses
Youtube registratie van de presentatie 'Van chemie naar ecologie. Niet straks maar nú!'
A study to identify alternatives for the use of chemical amenities in turfgrass systems
Struik, Paul - \ 2016
sports grounds - golf courses - golf - grass sward - chemical control - biological control - integrated pest management - ecosystems
Biologische bestrijding trips snijbloemen een stap dichterbij : Roofmijten bijvoeren met stuifmeel helpt bij totaalaanpak trips
Messelink, Gerben ; Leman, Ada - \ 2016
predatory mites - plant protection - biological control - cut flowers - greenhouse horticulture - pollen - pest control - integrated pest management
Nog geen zicht op biologische bestrijding van Rhizoctonia in radijs : resultaten onderzoek alternatieve bestrijdingsmethoden
Weerheim, Kees ; Streminska, Marta - \ 2016
biological control - radishes - rhizoctonia - moulds - research - scientific research
Gebruik van groene middelen : Inventarisatie laanboomkwekerij
Sluis, B.J. van der; Kuik, A.J. van; Baltissen, A.H.M.C. - \ 2016
Wageningen : Wageningen Plant Research, Bloembollen, Boomkwekerij & Fruit - 22 p.
bos- en haagplantsoen - straatbomen - aantrekkelijke bomen - gelderland - gewasbescherming - geïntegreerde plagenbestrijding - biologische bestrijding - natuurlijke producten - bladvoeding - natuurlijke vijanden - organismen ingezet bij biologische bestrijding - woody nursery stock - street trees - amenity trees - plant protection - integrated pest management - biological control - natural products - foliar nutrition - natural enemies - biological control agents
In de laanboomteelt in de regio Opheusden wordt al jarenlang gewerkt aan verduurzaming van de teeltmethoden. Het verantwoord toepassen van gewasbeschermingsmiddelen is daarvan een belangrijk onderdeel. Door strengere regelgeving wordt het chemische middelenpakket steeds verder beperkt en komen boomkwekers in toenemende mate voor knelpunten te staan. Uit oriënterende gesprekken in de regio blijkt dat een deel van de boomkwekerijbedrijven zich inmiddels toelegt op het gebruik van groene middelen om zo de afhankelijkheid van chemische middelen te verkleinen. Volgens de definitie van het Ctgb zijn dit gewasbeschermingsmiddelen van natuurlijke oorsprong (planten, dieren, microorganismen) met een laag risico voor mens, dier, milieu en niet-doelorganismen. In dit project wordt geïnventariseerd wat de mate van gebruik is van groene middelen door laanboomkwekers in de regio Rivierenland én wat hun ervaringen zijn met deze middelen. De uitkomst kan de sector in de regio benutten om de kennisuitwisseling voor duurzaam telen te bevorderen, zowel tussen kwekers als naar de burgers.
Alternatieven voor neonicotinoïden in de sierteelt onder glas : bestrijding van tabakswittevlieg en bladluis in kuipplanten en perkgoed
Messelink, Gerben ; Vijverberg, Roland ; Bloemhard, Chantal ; Leman, Ada - \ 2016
Bleiswijk : Wageningen UR Glastuinbouw (Rapport GTB 1418) - 42
tuinplanten - containerplanten - insectenplagen - bemisia tabaci - aphididae - kasgewassen - glastuinbouw - biologische bestrijding - insecticiden - lecanicillium muscarium - entomopathogene schimmels - roofinsecten - bedding plants - container grown plants - insect pests - greenhouse crops - greenhouse horticulture - biological control - insecticides - entomogenous fungi - predatory insects
The control of phloem feeding insects such as aphids, whiteflies, cicadas, mealybugs, scales and plant feeding bugs in greenhouse crops still largely depends on the use of neonicotinoids. However, the increased found negative effects on the environment will soon results in a total ban on the use of these pesticides. In this project we summarized the possible alternative control measures with pesticides and biological control agents. Furthermore, a number of preventive and curative control measures was evaluated for the control of aphids in bedding plants and the tobacco whitefly in container plants, with Calibrachoa and Mandevilla as model plants. An endophytic application of an isolate of the entomopathogenic fungus Lecanicillium gave a clear trend of 25% reduced population growth of aphids on Calibrachoa. Curative control of aphids with lacewings was not effective. Mullein plants enhanced tobacco whitefly control by the predatory bug Macrolophus pygmaeus in Mandevilla and increased predator survival and reproduction. Among the tested alternative control measures, we found 5 products that controlled tobacco whiteflies effectively in Mandevilla.
Volatile-mediated interactions in the rhizosphere
Cordovez da Cunha, Viviane - \ 2016
University. Promotor(en): Francine Govers; Jos Raaijmakers, co-promotor(en): V.J. Carrion. - Wageningen : Wageningen University - ISBN 9789462579019 - 219
rhizosphere bacteria - rhizosphere fungi - microbial interactions - volatile compounds - suppressive soils - actinobacteria - streptomyces - microbacterium - thanatephorus cucumeris - growth stimulators - biological control - defence mechanisms - genomics - transcriptomics - rizosfeerbacteriën - rizosfeerschimmels - microbiële interacties - vluchtige verbindingen - ziektewerende gronden - groeistimulatoren - biologische bestrijding - verdedigingsmechanismen - genomica - transcriptomica

Plants and microorganisms are constantly engaged in highly dynamic interactions both above- and belowground. Several of these interactions are mediated by volatile organic compounds (VOCs), small carbon-based compounds with high vapor pressure at ambient temperature. In the rhizosphere, VOCs have an advantage in intra- and interorganismal signaling since they can diffuse through soil pores over longer distances than other metabolites and are not dependent on water availability. The research described in this PhD thesis explored how beneficial and pathogenic microorganisms that live in the rhizosphere and endosphere modulate plant growth, development and resistance via the production of VOCs. In vitro and in vivo bioassays as well as different ‘omic’ approaches, such as volatomics, transcriptomics and genomics, were employed to investigate underlying mechanisms of VOC-mediated microbe-microbe and microbe-plant interactions.

To investigate the diversity and functions of microbial VOCs, a disease-suppressive soil was used as the source of the VOC-producing microorganisms. Previous metagenomics studies reported Actinobacteria, in particular Streptomyces and Microbacterium species, as the most abundant bacterial genera found in a soil naturally suppressive to the fungal root pathogen Rhizoctonia solani. VOCs of several Streptomyces isolates inhibited hyphal growth of R. solani and in addition, promoted plant growth. Coupling the Streptomyces VOC profiles with their effects on fungal growth pinpointed methyl 2-methylpentanoate and 1,3,5-trichloro-2-methoxy benzene as antifungal VOCs. Also Microbacterium isolates showed VOC-mediated antifungal activity and plant growth promotion. VOC profiling of Microbacterium sp. EC8 revealed several sulfur-containing compounds and ketones such as dimethyl disulfide, trimethyl trisulfide and 3,3,6-trimethylhepta-1,5-dien-4-one (also known as Artemisia ketone). Genome analysis of strain EC8 revealed genes involved in sulfur metabolism. Resolving the role of the identified compounds and genes in VOC-mediated plant growth promotion and induced resistance will be subject of future studies. VOC-mediated chemical warfare underground has been proposed as a key mechanism of natural disease-suppressive soils. The results presented in this thesis indeed point in that direction. However, to more conclusively determine the role of the identified Actinobacterial VOCs in soil suppressiveness to R. solani, it will be important to demonstrate that the fungicidal VOCs are actually produced in situ at the right place and at sufficient concentrations to suppress plant infection by the pathogenic fungus.

In agriculture, VOCs and VOC-producing microorganisms provide a potential alternative to the use of pesticides to protect plants and to improve crop production. In the past decades, several in vitro studies have described the effects of microbial VOCs on other (micro)organisms. However, little is still known on the potential of VOCs in large-scale agriculture and horticulture. The results described in this thesis show that VOCs from Microbacterium sp. EC8 stimulate the growth of Arabidopsis, lettuce and tomato, but do not control damping-off disease of lettuce caused by R. solani. Significant biomass increases were also observed for plants exposed only shortly to the bacterial VOCs prior to transplantation of the seedlings to soil. These results indicate that VOCs from strain EC8 can prime plants for growth promotion without direct contact and prolonged colonization. Furthermore, the induction of the plant growth-promoting effects appeared to be plant tissue specific. Root exposure to the bacterial VOCs led to a significant increase in plant biomass whereas shoot exposure did not result in significant biomass increase of lettuce and tomato seedlings. Genome-wide transcriptome analysis of Arabidopsis seedlings exposed to VOCs from this bacterium showed an up-regulation of genes involved in sulfur and nitrogen metabolism and in ethylene and jasmonic acid signaling. These results suggest that the blend of VOCs of strain EC8 favors, in part, the plant’s assimilation of sulfate and nitrogen, essential nutrients for plant growth, development and also resistance.

Similar to beneficial microorganisms, plant pathogenic microorganisms have also evolved strategies to modulate growth and defense of their hosts. For instance, compounds secreted by pathogens may suppress or interfere with plant defense. In this thesis I show that R. solani produces an array of VOCs that promote growth, accelerate development, change VOC emission and reduce insect resistance of plants. Plant growth-promoting effects induced by the fungal VOCs were not transgenerational. Genome-wide transcriptome analysis of Arabidopsis seedlings revealed that exposure to fungal VOCs caused up-regulation of genes involved in auxin signaling, but down-regulation of genes involved in ethylene and jasmonic acid signaling. These findings suggest that this soil-borne pathogen uses VOCs to predispose plants for infection by stimulating lateral root formation and enhancing root biomass while suppressing defense mechanisms. Alternatively, upon perception of VOCs from soil-borne pathogens, plants may invest in root biomass while minimizing investments in defense, a trade-off that helps them to speed up growth and reproduction and to survive pathogen attack.

In conclusion, the research presented in this thesis shows that both plants and microorganisms engage via VOCs in long-distance interactions and that beneficial and pathogenic soil microorganisms can alter plant physiology in different ways. Here, I provided a first step in identifying microbial genes involved in the regulation of biologically active VOCs as well as candidate plant genes involved in VOC perception and signal transduction. How plants sense and differentiate among VOCs from beneficial and pathogenic soil microorganisms will be an intriguing subject for future studies.

Hoe wetenschap kan bijdragen aan duurzaam turfgrass management
Regensburg, Taco - \ 2016
plant protection - golf courses - weed control - biological control - agricultural research - pest control - plant disease control
Biologische bestrijding van Echinothrips americanus
Messelink, G.J. ; Gasemzadeh, Somayyeh ; Ada, Leman ; Leman, A. - \ 2016
Bleiswijk : Wageningen UR Glastuinbouw - 1 p.
greenhouse horticulture - plant protection - gerbera - sweet peppers - biological control - predator augmentation - thrips - predatory mites - greenhouse experiments - pollen - glastuinbouw - gewasbescherming - paprika's - biologische bestrijding - plaagbestrijding met predatoren - roofmijten - kasproeven - stuifmeel
Poster van het PlantgezondheidEvent 2016. Het doel van dit onderzoek was te bepalen welke roofmijten het meest geschikt zijn voor de bestrijding van Echinothrips en wat de invloed van stuifmeel op deze bestrijding is. In het laboratorium is nauwkeurig bekeken welke stadia vatbaar zijn voor roofmijten en hoeveel individuen van welk stadium per dag worden gegeten. Dit is getest voor de roofmijten Amblyseius swirskii, Amblydromalus limonicus, Euseius ovalis en Euseius gallicus. Vervolgens zijn kasproeven uitgevoerd op paprika en gerbera om de bestrijding en invloed van stuifmeel te beoordelen.
Conservation of predaceous Coccinellidae species in greenhouse ecosystems
Papanikolaou, N.E. ; Milonas, P.G. ; Meijer, R.J.M. - \ 2016
BioGreenhouse (Fact sheet BioGreenhouse 7) - 2 p.
organic farming - horticulture - greenhouse horticulture - plant health - natural enemies - habitats - coccinellidae - agroecosystems - biological control - pesticides - biologische landbouw - tuinbouw - glastuinbouw - plantgezondheid - natuurlijke vijanden - agro-ecosystemen - biologische bestrijding - pesticiden
Conservation of natural enemies is an important component of pest management, which can improve their efficacy against target pests. Conserving predaceous Coccinelidae species in agricultural ecosystems is used to enhance their biocontrol contribution. Favourable conditions in these habitats can contribute to a more efficient population regulation of several pests. Conservation efforts focus on discouraging emigration from a crop system and enhance retention time of coccinelids in periods with low prey availability. Thus, the management of agroecosystems should focus on providing resources in such temporal and spatial scale that may prevent their emigration or attract them in habitats. In addition, in a greenhouse ecosystem, another conservation action is to reduce mortality and sublethal effects caused by insecticides.
Anaerobe Grondontsmetting (AGO) voor open teelten
Os, G.J. van; Lamers, J.G. - \ 2016
Wageningen UR - 8 p.
biologische grondontsmetting - biologische bestrijding - nematoda - bestrijdingsmethoden - bodemschimmels - fusarium - verticillium - biological soil sterilization - biological control - control methods - soil fungi
Anaerobe grondontsmetting is een biologische manier van grond ontsmetten. Hiermee wordt een breed scala aan schadelijke ziekten en plagen in de bodem beheersbaar. Het is een goed alternatief voor de chemische grondontsmetting (metamnatrium) ter bestrijding van aaltjes en veelal de enige bestrijdingsmaatregel tegen een aantal ziekteverwekkende bodemschimmels, zoals Fusarium en Verticillium.
Kansen voor toepassing van microalgen in landbouwgewassen
Spruijt, J. ; Weide, R.Y. van der - \ 2016
Lelystad : ACRRES - Wageningen UR (Rapport / PPO-AGV 691) - 62 p.
akkerbouw - tuinbouw - bemesting - algen - algenteelt - duurzame landbouw - duurzame ontwikkeling - gewasbescherming - plantgezondheid - bacteriën - biologische bestrijding - arable farming - horticulture - fertilizer application - algae - algae culture - sustainable agriculture - sustainable development - plant protection - plant health - bacteria - biological control
Op basis van internationaal literatuuronderzoek blijken er interessante kansen voor toepassing van microalgen producten in landbouwgewassen te zijn. In dit rapport worden zowel groene algen als cyanobacteriën gedefinieerd als microalgen. Stoffen uit microalgen (met name uit cyanobacteriën) blijken in diverse onderzoeken uit de literatuur een goede bestrijding te geven van verschillende schimmels en aaltjes die in landbouwgewassen schade aanrichten. Verder is er (buiten de landbouw) insecticide-, molluscicide-, herbicide- en algacidewerking met stoffen uit cyanobacteriën aangetoond. In Nederland zijn zeewier- en algenextracten krachtens de Verordening gewasbescherming als werkzame stof goedgekeurd voor de groeiregulatie van planten. Het gebruik als bodemverbeteraar of als plantenstimulator is vooralsnog veel minder gereguleerd dan als gewasbeschermingsmiddel. Om de kansen met microalgen te benutten zou er verder geïnvesteerd moeten worden in onderzoek. Het zou duidelijk moeten worden welke werkzame stoffen uit micro algen of welke algenpreparaten andere organismen bestrijden, in welke formulering en met welke dosering. De bestrijdende, bemestende, bodem verbeterende, plantweerstand verhogende en milieueffecten van algentoepassingen zouden vergeleken moeten worden met conventionele methoden.
Biologische bestrijding van wol- en schildluis in de sierteelt onder glas
Kruidhof, H.M. ; Messelink, G.J. ; Leman, A. ; Vijverberg, Roland - \ 2016
Wageningen : Wageningen UR Glastuinbouw - 1 p.
tuinbouw - glastuinbouw - biologische bestrijding - sierteelt - cymbidium - rosaceae - planococcus citri - coccoidea - sluipwespen - predatoren - roofinsecten - thrips - coleoptera - horticulture - greenhouse horticulture - biological control - ornamental horticulture - parasitoid wasps - predators - predatory insects
Het doel van dit project is om de biologische bestrijding van wol-en schildluis te verbeteren met nieuwe inzetstrategieën van bestaande bestrijders en door opsporing van complementaire nieuwe bestrijders. Poster van het PlantgezondheidEvent 2016.
Ontwikkeling systeemaanpak meeldauw
Hofland-Zijlstra, J.D. ; Breeuwsma, S.J. ; Noordam, Marianne - \ 2016
- 1 p.
biologische bestrijding - tuinbouw - glastuinbouw - bestrijdingsmethoden - meeldauw - kasproeven - potplanten - tomaten - gerbera - rosaceae - ziekteresistentie - biological control - horticulture - greenhouse horticulture - control methods - mildews - greenhouse experiments - pot plants - tomatoes - disease resistance
Doel van dit onderzoek is het ontwikkelen van een systeemaanpak voor de beheersing van meeldauw door de inzet van groene producten (laag-risico profiel) die een bijdrage leveren aan het versterken van natuurlijke afweerreacties. Poster van het PlantgezondheidEvent 2016.
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