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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Effect of Taste Enhancement on Consumer Acceptance of Pureed Cucumber and Green Capsicum
Stokkom, Vera L. van; Graaf, Cees de; Kooten, Olaf van; Stieger, Markus - \ 2018
Journal of Food Science 83 (2018)10. - ISSN 0022-1147 - p. 2578 - 2585.
acceptance - capsicum - cucumber - taste - vegetable

Abstract: Vegetables have low taste intensities, which might contribute to low acceptance. The aim of this study was to investigate the effect of taste (sweetness, sourness, bitterness, umami, and saltiness) and fattiness enhancement on consumer acceptance of cucumber and green capsicum purees. Three concentrations of sugar, citric acid, caffeine, mono-sodium glutamate, NaCl, and sunflower oil were added to pureed cucumber and green capsicum. Subjects (n = 66, 35.6 ± 17.7 y) rated taste and fattiness intensity. Different subjects (n = 100, 33.2 ± 16.5 years) evaluated acceptance of all pureed vegetables. Taste intensities of vegetable purees were significantly different (P < 0.05) between the three tastant concentrations except for umami in both vegetable purees, sourness in green capsicum puree, and fattiness in cucumber puree. Only enhancement of sweetness significantly (P < 0.05) increased acceptance of both vegetable purees compared to unmodified purees. In cucumber purees, relatively small amounts of added sucrose (2%) increased acceptance already significantly, whereas in green capsicum acceptance increased significantly only with addition of 5% sucrose. Enhancement of other taste modalities did not significantly increase acceptance of both vegetable purees. Enhancing saltiness and bitterness significantly decreased acceptance of both vegetable purees. We conclude that the effect of taste enhancement on acceptance of vegetable purees differs between tastants and depends on tastant concentration and vegetable type. With the exception of sweetness, taste enhancement of taste modalities such as sourness, bitterness, umami, and saltiness was insufficient to increase acceptance of vegetable purees. We suggest that more complex taste, flavor, or texture modifications are required to enhance acceptance of vegetables. Practical Application: Results can be used by cultivators to select and grow vegetable varieties with enhanced taste and flavor. Especially for cucumber, relatively small sweetness enhancement is sufficient to increase acceptance.

Stress speelt een belangrijke rol : inzicht in koploosheid groeit door gezamenlijk onderzoek
Groot, S.P.C. ; Kierkels, T. ; Heuvelink, E. - \ 2016
Onder Glas 13 (2016)8. - p. 30 - 31.
tuinbouw - groenten - landbouwkundig onderzoek - groeistoornis - plantenontwikkeling - verlichting - tomaten - capsicum - brassica - gypsophila - stresstolerantie - temperatuur - horticulture - vegetables - agricultural research - failure to thrive - plant development - lighting - tomatoes - stress tolerance - temperature

Jonge tomaten- en paprikaplanten, maar ook een aantal andere gewassen, houden soms opeens op met groeien. Koploosheid was lange tijd een lastig maar zeer slecht begrepen fenomeen. De laatste jaren is het inzicht in een stroomversnelling gekomen. In ieder geval is het aantal mogelijke oorzaken drastisch ingeperkt.
Statistical methods for QTL mapping and genomic prediction of multiple traits and environments: case studies in pepper
Alimi, Nurudeen Adeniyi - \ 2016
Wageningen University. Promotor(en): Fred van Eeuwijk, co-promotor(en): Marco Bink. - Wageningen : Wageningen University - ISBN 9789462579361 - 153
capsicum - statistical analysis - statistics - genomics - quantitative trait loci - quantitative traits - quantitative methods - genetics - crop yield - capsicum - statistische analyse - statistiek - genomica - loci voor kwantitatief kenmerk - kwantitatieve kenmerken - kwantitatieve methoden - genetica - gewasopbrengst

In this thesis we describe the results of a number of quantitative techniques that were used to understand the genetics of yield in pepper as an example of complex trait measured in a number of environments. Main objectives were; i) to propose a number of mixed models to detect QTLs for multiple traits and multiple environments, ii) to extend the multi-trait QTL models to a multi-trait genomic prediction model, iii) to study how well the complex trait yield can be indirectly predicted from its component traits, and iv) to understand the ‘causal’ relationships between the target trait yield and its component traits.

The thesis is part of an EU-FP7 project “Smart tools for Prediction and Improvements of Crop Yield” (SPICY- http://www.spicyweb.eu/). This project generated phenotypic data from four environments using 149 individuals from the sixth generation of recombinant inbred lines obtained from intraspecific cross between large – fruited inbred pepper cultivar ‘Yolo Wonder’ (YW) and the hot pepper cultivar ‘Criollo de Morelos 334’ (CM 334). A total of 16 physiological traits were evaluated across the four trials and various types of genetic parameters were estimated. In a first analysis, the traits were univariately analyzed using linear mixed model. Trait heritabilities were generally large (ranging between 0.43 – 0.96 with an average of 0.86) and mostly comparable across trials while many of the traits displayed heterosis and transgression. The same QTLs were detected across the four trials, though QTL magnitude differed for many of the traits. We also found that some QTLs affected more than one trait, suggesting QTL pleiotropy (a QTL region affecting more than one trait). We discussed our results in the light of previously reported QTLs for these and similar traits in pepper.

We addressed the presence of genotype-by-environment interaction (GEI) in yield and the other traits through a multi-environment (ME) mixed model methodology with terms for QTL-by-environment interaction (QEI). We opined that yield would benefit from joint analysis with other traits and so deployed two other mixed model based multi-response QTL approaches: a multi-trait approach (MT) and a multi-trait multi-environment approach (MTME). For yield as well as the other traits, MTME was superior to ME and MT in the number of QTLs, the explained variance and accuracy of predictions. Many of the detected QTLs were pleiotropic and showed quantitative QEI. The results confirmed the feasibility and strengths of novel mixed model QTL methodology to study the architecture of complex traits.

The QTL methods considered thus far are not well suited for prediction purposes as only a limited set of QTL-related markers are used. Since the main interest of this research includes improvement of yield prediction, we explored both single-trait and multi-trait versions of genomic prediction (GP) models as alternatives to the QTL-based prediction (QP) models. This was termed direct prediction. The methods differed in their predictive accuracies with GP methods outperforming QP methods in both single and multi-traits situations. We borrowed ideas from crop growth model (CGM) to dissect complex trait yield into a number of its component traits. Here, we integrated QTL/genomic prediction and CGM approaches and showed that the target trait yield can be predicted via its component traits together with environmental covariables. This was termed indirect prediction. The CGM approach seemed to work well at first sight, but this is especially due to the fact that yield appeared to be strongly driven by just one of its components, the partitioning to fruit.

An alternative representation of the biological knowledge of a complex target trait such as yield is provided by network type models. We constructed both conditional and unconditional networks across the four environments to understand the ‘causal’ relationships between target trait yield and its component traits. The final networks for each environment from both conditional and unconditional methods were used in a structural equation model to assess the causal relationships. Conditioning QTL mapping on network structure improved detection of refined genetic architecture by distinguishing between QTL with direct and indirect effects, thereby removing non-significant effects found in the unconditional network and resolving QTL pleiotropy. Similar to the CGM topology, yield was established to be downstream to its component traits, indicating that yield can be studied and predicted from its component traits. Thus, the genetic improvements of yield would benefit from improvements on the component traits.

Finally, complex trait prediction can be enhanced by a full integration of the methods described in the different chapters. Recent research efforts have been channelled to incorporating both multivariate whole genome prediction models and crop growth models. Further research is required, but we hope that the present thesis presents useful steps towards better prediction models for complex traits exhibiting genotype by environment interaction.

Young fruits pull so hard, flowers above abort : developing fruits function too strongly as sink
Heuvelink, E. ; Marcelis, L.F.M. ; Kierkels, T. - \ 2016
In Greenhouses : the international magazine for greenhouse growers 5 (2016)2. - ISSN 2215-0633 - p. 16 - 17.
horticulture - greenhouse horticulture - capsicum - crop growth stage - maturity stage - auxins - crop production - parthenocarpy - tuinbouw - glastuinbouw - gewassen, groeifasen - groeifasen, rijp - auxinen - gewasproductie - parthenocarpie
Sweet peppers arrive in waves. New fruits lure so many assimilates towards them that the flowers above them abort. This article provides various suggestions about how to flatten out the peaks and troughs. In the long term, breeding can also play an important role.
Trial aims to show how LEDs can be used to steer commercial crop : green or blue light can steer plant growth
Dieleman, Anja ; Meinen, Esther - \ 2016
horticulture - greenhouse horticulture - led lamps - illumination - red light - blue light - agricultural research - crop growth stage - plant development - crop quality - tomatoes - capsicum
The application of LED lighting in greenhouse horticulture is still in its infancy. A few nurseries are already using LEDs, mostly red and blue. But still little is known about how the different light colours work precisely on the physiology of the plant. Research by Wageningen UR Greenhouse Horticulture in the Netherlands shows that blue and green LEDs can be used to steer a crop. A large greenhouse trial should give insight into how this can be applied in practise.
Paprikateelt in emissieloze kas haalt gelijke productie met zelfde kwaliteit : ‘bewustwording bij telers moet omhoog’
Beerling, Ellen ; Os, Erik van - \ 2016
horticulture - greenhouse horticulture - greenhouse technology - vegetables - capsicum - sweet peppers - emission reduction - agricultural research - water reuse - drainage water - water filters - disinfection - ozone - substrates - crop production

Als de proef met emissieloos telen één ding heeft duidelijk gemaakt, is het wel dat water meer vertrouwen verdient, menen Wageningen UR onderzoekers Ellen Beerling en Erik van Os. “Als we er bewust mee om gaan, neemt de noodzaak om te lozen aanzienlijk af.” De paprikateelt in het IDC Water in Bleiswijk verliep met volledige recirculatie van water en presteerde zeker niet minder dan de referentieteelt.

Bestrijding Echinothrips americanus met roofmijten en roofwantsen : groeiend probleem in sierteelt onder glas
Messelink, G.J. ; Leman, A. ; Gasemzadeh, Somayyeh - \ 2016
Onder Glas 13 (2016)2. - p. 24 - 25.
tuinbouw - glastuinbouw - plantenplagen - sierteelt - rosaceae - capsicum - groenten - snijbloemen - gerbera - gewasbescherming - landbouwkundig onderzoek - thrips - frankliniella occidentalis - roofmijten - reduviidae - stuifmeel - plagenbestrijding - horticulture - greenhouse horticulture - plant pests - ornamental horticulture - rosaceae - capsicum - vegetables - cut flowers - gerbera - plant protection - agricultural research - thrips - frankliniella occidentalis - predatory mites - reduviidae - pollen - pest control
Dat trips een enorm probleem is in de sierteelt onder glas is geen nieuws meer. In de meeste gevallen gaat het dan om de Californische trips, een soort met een sterke voorkeur voor bloemen. De laatste jaren duikt er steeds vaker een andere polyfage trips op, de Echinothrips americanus. Deze typische bladbewonende trips kan in sierteeltgewassen zoals gerbera en roos behoorlijk schade geven als er niet tijdig wordt ingegrepen. In onderzoek is nog eens nauwkeurig gekeken naar de bestrijding met een aantal soorten roofmijten en roofwantsen.
Plantenziektekunde anders
Goud, J.C. - \ 2015
Gewasbescherming 46 (2015)5. - ISSN 0166-6495 - p. 145 - 146.
gewasbescherming - plantenziektebestrijding - kassen - kasproeven - landbouwkundig onderzoek - dijken - wortels - klimaatverandering - abiotische beschadigingen - solanum dulcamara - maïs - capsicum - slakkenbestrijding - plant protection - plant disease control - greenhouses - greenhouse experiments - agricultural research - dykes - roots - climatic change - abiotic injuries - maize - mollusc control
Onlangs is bij de Radboud Universiteit Nijmegen een nieuw kassencomplex met faciliteiten in gebruik genomen. Er worden voedselkeuzeproeven gedaan met slakken, rupsen en coloradokevers, er wordt gewerkt aan planten die tolerant zijn tegen abiotische stress, zoals hitte, droogte en overstroming, er worden invasieve plantensoorten bestudeerd, zoals de waterhyacint, en er blijkt al een halve eeuw een grote genenbank van nachtschade-soorten (Solanaceae) te zijn. Genoeg interessants om eens een kijkje te gaan nemen bij de informatiedag. Bezoekers werden niet teleurgesteld. Maar het woord ‘plantenziektekunde’ is niet gevallen.
We zien de verbanden, nu nog de keiharde onderbouwing : Stuurgroep Interne Vruchtkwaliteit Paprika weer stap verder
Velden, P. van; Hofland-Zijlstra, J.D. - \ 2015
Onder Glas 12 (2015)2. - p. 12 - 13.
glastuinbouw - groenten - paprika's - capsicum - fusarium - vruchtrot - plantenziekten - samenwerking - landbouwkundig onderzoek - plantgezondheid - gewaskwaliteit - greenhouse horticulture - vegetables - sweet peppers - fruit rots - plant diseases - cooperation - agricultural research - plant health - crop quality
Als er de afgelopen twee jaar één ding duidelijk is geworden dan is het dat er heel veel factoren zijn die hun bijdrage leveren aan het ontwikkelen van Fusarium lactis in de vruchten van paprika’s. Ofwel: alles hangt met alles samen. De sleutel voor succes ligt in zorgvuldig en zorgzaam telen. Het consequent bemonsteren van geoogst product en de daaraan gekoppelde sancties hebben er wel toe bijgedragen dat iedere teler alert is geworden.
Kleine stappen vooruit tegen Fusarium in paprika
Beerens, N. ; Hofland-Zijlstra, J.D. ; Noordam, M. ; Broek, R.C.F.M. van den - \ 2015
Wageningen UR
gewasbescherming - tuinbouw - fusarium - vruchtrot - conferenties - capsicum - plagenbestrijding - kasproeven - plant protection - horticulture - fruit rots - conferences - pest control - greenhouse experiments
Doelstellingen van dit onderzoek: Effect toetsen van biologische en oxidatieve producten met een contactwerking op jonge gewasscheuten. Effect toetsen van diverse producten die de natuurlijke afweerreacties kunnen versterken tegen Fusarium op jonge planten in een kasproef. Poster van PlantgezondheidEvent 12 maart 2015.
Mogelijkheden voor bladluisbestrijding met schimmels
Messelink, G.J. ; Holstein-Saj, R. van; Dinu, M.M. ; Bloemhard, C.M.J. - \ 2015
gewasbescherming - tuinbouw - glastuinbouw - capsicum - plagenbestrijding - biologische bestrijding - aphididae - natuurlijke vijanden - kasproeven - entomopathogene schimmels - conferenties - plant protection - horticulture - greenhouse horticulture - capsicum - pest control - biological control - aphididae - natural enemies - greenhouse experiments - entomogenous fungi - conferences
Doelstelling: Bepalen welke soorten entomopathogene schimmels het meest kansrijk zijn voor de bestrijding van bladluizen in kasteelten en wat de randvoorwaarden zijn voor een geslaagde bestrijding. Poster van PlantgezondheidEvent 12 maart 2015.
Nieuwe sluipwespen tegen turkse mot, Chrysodeixis chalcites, in paprika : Opsporen en toetsen
Grosman, A.H. ; Bloemhard, C.M.J. - \ 2014
Bleiswijk : Wageningen UR (Rapport / Wageningen UR Glastuinbouw 1306) - 44
glastuinbouw - gewasbescherming - capsicum - paprika's - plantenplagen - chrysodeixis chalcites - sluipwespen - schadepreventie - landbouwkundig onderzoek - greenhouse horticulture - plant protection - sweet peppers - plant pests - parasitoid wasps - loss prevention - agricultural research
De Turkse mot, C. chalcites, geeft schade in de paprikateelt van voor- tot najaar. In het verleden werden vooral spontaan in de kas optredende bestrijders of bestrijders van verwante soorten in het onderzoek meegenomen. Dit gaf onvoldoende resultaat. Mogelijk waren deze sluipwespen niet aangepast aan het agressieve gedrag van deze rups. Dit gaf aanleiding om soorten op te sporen die zich van nature daarin gespecialiseerd hebben, in het oorspronkelijke verspreidingsgebied, o.a. in Spanje. Er zijn een eiparasiet ‘Trichogramma sp.’, een solitaire soort ‘Hyposoter didymator’ en een gregaire soort ‘Cotesia vanessae’ opgespoord. Wat betreft zoekvermogen en populatie opbouw in de kas waren ze alle drie succesvol. Voor telers is vooral een eiparasiet interessant, omdat deze de meeste schade voorkomt. Praktijkproeven zouden de goede prestaties nog moeten bevestigen.Bovendien zijn Trichogramma species makkelijk te kweken. Voor massaproductie van H. didymator en C. vanesae bestaan echter nog geen geschikte kweekmethodes. Microplitis spinolae is een nieuwkomer, opgespoord in een Nederlandse kasteelt. Deze soort maakt twee verschillenden poppen, waarvan één waarschijnlijk een overwinteringspop is. Dit maakt M. spinola interessant voor onderzoek.Chrysodeixis chalcites give damage in growing sweetpeppers from spring to autumn. In the past, especially in the greenhouse spontaneously occurring wasps or wasps of related species were included in the research programs. This gave unsatisfactory results. This may caused by wasps were not adjusted to the aggressive behavior of this caterpillar. This research was focussed to trace specialized wasp in the native area of C. chalcites, among others in Spain. Species that were found are the egg parasite ‘Trichogramma sp.’, a solitary wasp ‘Hyposoter didymator’ and a gregarious wasp ‘Cotesia Vanessa’. Regarding searching ability and population growth in the greenhouse , they were all successful. For growers primarily a egg parasite is interesting because this one avoid most of the damage. Trials in commercial greenhouses must confirm the good results.Moreover Trichogramma species are easy to rear. Unfortenately there are no suitable rearing methods yet for mass production of H. didymator and C. vanesae. Microplitis spinolae is a newcomer, detected in a Dutch greenhouse. This specie produces two different kind of pupae. Probably one to overwinter. This makes M. spinola interesting for research.
Drie mogelijke sluipwespen tegen Turkse mot in paprika (interview met Amir Grosman)
Arkesteijn, M. ; Grosman, A.H. - \ 2013
Onder Glas 10 (2013)12. - p. 32 - 33.
glastuinbouw - groenten - capsicum - paprika's - organismen ingezet bij biologische bestrijding - chrysodeixis chalcites - sluipwespen - rupsen - landbouwkundig onderzoek - greenhouse horticulture - vegetables - capsicum - sweet peppers - biological control agents - chrysodeixis chalcites - parasitoid wasps - caterpillars - agricultural research
Het onderzoek naar biologische bestrijders van de Turkse mot is zo goed als afgerond. Amir Grosman, onderzoeker gewasbescherming bij Wageningen UR Glastuinbouw, heeft na drie jaar onderzoek drie kandidaten: een ei-parasiet die sinds kort op de markt is en twee rupsparasieten.
Alleen een duurzaam pakket van maatregelen zal helpen (interview met Jantineke Hofland-Zijlstra)
Velden, P. van; Hofland-Zijlstra, J.D. - \ 2013
Onder Glas 10 (2013)11. - p. 10 - 11.
glastuinbouw - groenten - paprika's - capsicum - vruchtrot - aantasting - gegevensanalyse - inventarisaties - greenhouse horticulture - vegetables - sweet peppers - fruit rots - infestation - data analysis - inventories
Het eerste jaar van samenwerking binnen de Stuurgroep Interne Vruchtkwaliteit is achter de rug. Inventarisatie van de factoren die vruchtrot kunnen veroorzaken levert zoveel gegevens op dat het moeilijk is om de vinger op één zere plek te leggen. Fusarium is eigenlijk altijd aanwezig, maar onduidelijk is welke factor uiteindelijk bepalend is voor een aantasting.
Resistance to thrips in pepper
Maharijaya, A. - \ 2013
Wageningen University. Promotor(en): Richard Visser, co-promotor(en): Roeland Voorrips; Ben Vosman. - Wageningen : Wageningen UR - ISBN 9789461737397 - 110
capsicum - capsicum annuum - capsicum chinense - paprika's - spaanse pepers - insectenplagen - vectoren, ziekten - frankliniella occidentalis - thrips - plaagresistentie - loci voor kwantitatief kenmerk - soortkruising - plantenveredeling - capsicum - capsicum annuum - capsicum chinense - sweet peppers - chillies - insect pests - disease vectors - frankliniella occidentalis - thrips - pest resistance - quantitative trait loci - interspecific hybridization - plant breeding

Pepper (Capsicum) production is constrained by heavy infestations of thrips, causing direct and indirect (by transmitting viruses) damage. Thrips control using chemical insecticides, biological agents, culture practices and integrated pest management has limited success. The availability of thrips-resistant varieties would increase the effectiveness of thrips control and may also delay and reduce the transmission of viruses. This thesis is aimed at obtaining more knowledge regarding thrips resistance in pepper, including the identification of new sources of resistance, the elucidation of resistance mechanisms, identification of factors contributing to resistance and a QTL analysis.

We developed several test methods to evaluate plant resistance to thrips and showed that in vitro tests correlate well with greenhouse tests. We used these methods to test a collection of Capsicum accessions of widely different origin and crop types. This resulted in the identification of a few accessions (mostly C. annuum) with high levels of resistance to two thrips species: Frankliniella occidentalis and Thrips parvispinus. Since C. annuum is the most widely cultivated species, the finding of resistance in C. annuum is means that the resistance can be easily introgressed through conventional crossing and selection.

The effect of resistance in pepper on thrips reproduction and development was studied using three highly resistant, three medium resistant and three susceptible accessions selected based on damage ratings. Adult and pre-adult survival, developmental time and reproduction rate were assessed in a detached leaf system. Resistance factors in leaves of resistant pepper accessions were shown to have significant effects on oviposition rate, larval mortality and life-cycle period, indicating that this resistance is based on antibiosis.

In order to map QTL for resistance we developed an F2 population from the cross between a susceptible C. chinense accession and the resistant C. annuum AC 1979. A genetic linkage map for this population was based on AFLP and SSR markers, where the SSR markers served to assign and orient most linkage groups to pepper chromosomes. As larval stages were highly affected by resistance in pepper leaves, damage caused by larvae and larval survival were used as parameters to detect QTLs conferring resistance to thrips. Interval mapping detected one QTL for each of these parameters, all co-localizing near the same marker on chromosome 6. This QTL explained about 50% of the genetic variation, and the resistance allele of this QTL was inherited from the resistant parent. No other resistance QTLs were detected in this population.

Since resistance to thrips was clearly expressed in pepper leaves we proceeded to study leaf traits that may contribute to resistance. Morphological leaf characters and metabolites have frequently been linked with resistance to thrips in other plant species. However, we found no convincing evidence that any of these traits played a role in thrips resistance in pepper. In the F2 mapping population we found no correlation and no QTL co-localization of resistance with leaf morphological characters previously linked to resistance in pepper against insect pest and in other plant species against thrips e.g. color, toughness, trichome density, and cuticula thickness. GC-MS (Gass Chromatography – Mass Spectrometry) analysis of the three resistant, three intermediate and three susceptible accessions mentioned above showed that seven metabolites were correlated with resistance to thrips and six compounds with susceptibility. However, when we applied GC-MS and LC-MS (Liquid Chromatography – Mass Spectrometry) to leaves of the F2 mapping population, we found no strong correlation between resistance and any detected metabolites. Two metabolite QTLs co-localized with the resistance QTL. However, these QTLs explained only a small proportion of the variance and the co-localization was not supported by strong correlations of the metabolites with resistance. This suggests that the major resistance factor(s) in pepper against thrips may not or only partially be determined by the presence or absence of specific metabolites.

This thesis provides a strong basis for the development of thrips resistant pepper varieties through introgression of the resistance QTL region on chromosome 6 originating from resistant C. annuum accessions. However, the effect of resistance QTL on chromosome 6 should be confirmed in another population such as a population of F3 lines. In vitro leaf assay can be used as evaluation methods in pepper breeding program. This has the advantages of minimizing the risk of contamination and of controlled environmental conditions. Elucidation of factors contributing to resistance should be continued by giving attention to other possibilities such as proteins, specifically proteinase inhibitors, or other leaf anatomical and morphological traits. Also other extraction and detection methods may be used to discover other metabolites that might be related to resistance. Finally, for practical applications it is necessary study how to use the antibiosis based mechanism against thrips found in this thesis in thrips control and/or management practices.

Een model met een smaakje (Interview met Caroline Labrie)
Langen, E. ; Labrie, C.W. - \ 2013
Kas Magazine / TuinbouwCommunicatie 2013 (2013)4. - ISSN 1878-8408 - p. 14 - 17.
paprika - vruchtgroenten - smaak - smaakonderzoek - sensorische evaluatie - capsicum - cultivars - modellen - onderzoek - sweet peppers - fruit vegetables - taste - taste research - sensory evaluation - models - research
Over smaak valt niet te twisten. En toch gebeurt dat maar al te vaak. "Er kan oeverloos over de smaak van paprika's worden gepraat en gediscussieerd. Daarom is het belangrijk dat de smaak van paprika's geobjectiveerd wordt", vertelt Caroline Labrie van Wageningen UR Glastuinbouw. Dat kan met een smaakmodel voor paprika. De ontwikkeling hiervan is drie jaar geleden gestart. Het model moet uitkomst gaan bieden voor veredelaars, maar ook telers kunnen er hun voordeel mee doen.
Bladluis resistentie in paprika ; Groene Veredeling 12 juni 2013
Vosman, Ben - \ 2013
greenhouse horticulture - aphididae - myzus persicae - capsicum - varieties - methodology - plant pests - selection - experiments - pest resistance
Beheersing van Erwinia vruchtrot in paprika
Hofland-Zijlstra, Jantineke - \ 2013
capsicum - erwinia - fruit rots - plant diseases - plant protection - industrial hygiene - relative humidity - antagonists - trials
Beheersing van Erwinia vruchtrot in paprika
Vries, R.S.M. de; Hofland-Zijlstra, J.D. - \ 2013
capsicum - erwinia - vruchtrot - plantenziekten - gewasbescherming - bedrijfshygiëne - drosophilidae - proeven - fruit rots - plant diseases - plant protection - industrial hygiene - trials
Presentatie van onderzoek naar Erwinia vruchtrot in paprika. De doelstellingen zijn: kennisinventarisatie beheersmaatregelen Erwinia, praktijkinventarisatie Erwinia vruchtrot, praktijkbemonstering op mogelijke infectiebronnen, beheersmaatregelen toetsen om Erwinia vruchtrot te voorkomen, rol fruitvliegjes onderzoeken bij het infectieproces van Erwinia.
Olifantspoten in paprika - Telersinventarisatie, symptoombeschrijving en hypotheses
Ludeking, D.J.W. ; Kersten, M. ; Vries, R.S.M. de - \ 2013
capsicum - paprika's - afwijkingen - schimmelziekten - symptomen - proeven - inventarisaties - landbouwkundig onderzoek - sweet peppers - abnormalities - fungal diseases - symptoms - trials - inventories - agricultural research
Poster over 'Olifantspoten in paprika'. Het doel van het onderzoek was het beantwoorden van onder telers levende vragen: hoe ontstaan ‘olifantspoten’ bij de teelt van paprika? en hoe en in welke mate dragen wortel- en voetrotschimmels bij aan de ontwikkeling van ‘olifantspoten’? Dragen insecten bij aan de verspreiding en de snelheid van het rottingsproces? Het onderzoek heeft geleid tot een uitgebreide symptoombeschrijving en het formuleren van hypotheses.
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