Juergen Junk

Juergen Junk
Luxembourg Institute of Science and Technology (LIST) | LIST · Environmental Research and Innovation

Dr.

About

141
Publications
23,475
Reads
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1,214
Citations
Additional affiliations
June 2007 - December 2014
Luxembourg Institute of Science and Technology (LIST)
Position
  • Senior Researcher
July 2000 - June 2007
Universität Trier
Position
  • Senior Researcher

Publications

Publications (141)
Article
Full-text available
With global warming, grapevine is expected to be increasingly exposed to water deficits occurring at various development stages. In this study, we aimed to investigate the potential impacts of projected climate change on water deficits from the flowering to veraison period for two main white wine cultivars (Riesling and Müller-Thurgau) in Germany....
Technical Report
Full-text available
Für den Standort Remich liegen seit 1970 kontinuierliche, systematische Wetteraufzeichnungen der von der Administration des services techniques de l’agriculture (ASTA) betriebenen Wetterstation am Weinbauinstitut vor. Darüber hinaus berichtet seit mindestens 50 Jahren das jährlich erscheinende «Weinjahr» umfassende statistische Daten zum Luxemburge...
Article
Full-text available
Um die Auswirkungen des Klimawandels auf den luxemburgischen Weinbau abzuschätzen und mögliche Zukunftsszenarien ableiten zu können, haben Dr. Daniel Molitor und Dr. Jürgen Junk vom Luxembourg Institute of Science and Technology (LIST) und Mareike Schultz vom Institut Viti-Vinicole Wetterdaten der Station Remich aus den letzten 50 Jahren untersucht...
Article
Full-text available
Der Klimawandel ist in Mitteleuropa längt angekommen ¬ mit bereits deutlich spürbaren Auswirkungen auf den Weinbau. Hinweise darauf, wie die Entwicklung weitergeht und worauf die Winzer sich einstellen müssen, können bereits jetzt messbare Trends geben. Dr. Daniel Molitor und Dr. Jürgen Junk vom Luxembourg Institute of Science and Technology (LIST)...
Article
Full-text available
Climate change is a major challenge to viticulture worldwide. The adaptation potential of the different strategies to cope with climate change still embraces many uncertainties (e.g., unpredictable social-economic developments and land-use changes), particularly in the long-term. However, adaptation strategies adjusted to local terroirs and regiona...
Article
Full-text available
Short-term adaptation of European viticulture to climate change: an overview from the H2020 Clim4Vitis action >>> Viticulture is exposed and vulnerable to extreme weather and climate change. In Europe, owing to the high socioeconomic value of the winemaking sector, the development of adaptation strategies to mitigate climate change impacts will be...
Article
Full-text available
Viticulture is exposed and vulnerable to extreme weather and climate change. In Europe, owing to the high socio-economic value of the winemaking sector, the development of adaptation strategies to mitigate climate change impacts will be of foremost relevance for its future sustainability and competitiveness. Some guidelines on feasible short-term a...
Article
Full-text available
The red gum lerp psyllid, Glycaspis brimblecombei Moore (Hemiptera: Aphalaridae), is an invasive pest of Eucalyptus trees worldwide, responsible for serious damage, including the death of plants. Knowledge about the incidence of climatic factors on the insect development are essential to define useful strategies for controlling this pest. To this a...
Article
Full-text available
The choice of the phyllotherm value for predicting leaf emergence under field conditions is pivotal to the success of fungicide-based disease risk management in temperate cereals. In this study, we investigated phyllotherm variability for predicting the emergence of the three uppermost leaves (i.e., three last leaves to emerge) in winter wheat and...
Article
Full-text available
The choice of the phyllotherm value for predicting leaf emergence under field conditions is pivotal to the success of fungicide-based disease risk management in temperate cereals. In this study, we investigated phyllotherm variability for predicting the emergence of the three uppermost leaves (i.e., three last leaves to emerge) in winter wheat and...
Article
Full-text available
The intensification of livestock production, to accommodate rising human population, has led to a higher emission of ammonia into the environment. For the reduction of ammonia emissions, different management steps have been reported in most EU countries. Some authors, however, have criticized such individual measures, because attempts to abate the...
Article
Present investigations aimed at developing a unified cumulative degree day based model approach allowing for (i) a precise simulation of grapevine phenological development of a broad range of cultivars and (ii) a classification of the cultivar specific relative precocity of different cultivars at different stages of grape development. Based on a lo...
Article
Citation: Eickermann M., Ronellenfitsch F.K., Junk J. (2020): Developing a decision support tool to forecast the abundance of the cabbage stem weevil in winter oilseed rape. Plant Protect. Sci. Abstract: Reducing the use of pesticides in agricultural systems is a prerequisite for sustainable agriculture and, therefore , knowledge on the factors tha...
Article
Full-text available
Budbreak date in grapevine is strictly dependent on temperature, and the correct simulation of its occurrence is of great interest since it may have major consequences on the final yield and quality. In this study, we evaluated the reliability for budbreak simulation of two modeling approaches, the chilling-forcing (CF), which describes the entire...
Article
The aim of the present investigations was to simulate the annual risk of bunch rot (Botrytis cinerea) on Vitis vinifera L. cv. Riesling grapes based on three long-term (n = 3 × 7 = 21 cases) assessment data sets originating from three Central European grape-growing regions. Periods when meteorological parameters were significantly (p < 0.01) correl...
Article
Full-text available
Viticulture and winemaking are important socioeconomic sectors in many European regions. Climate plays a vital role in the terroir of a given wine region, as it strongly controls canopy microclimate, vine growth, vine physiology, yield, and berry composition, which together determine wine attributes and typicity. New challenges are, however, predic...
Chapter
Full-text available
Septoria tritici blotch (STB) is among the most important crop diseases causing continuous threats to wheat production worldwide. STB epidemics are the outcome of interactions between susceptible host cultivars, favorable environmental conditions, and sufficient quantities of pathogen inoculum. Thus, to determine whether fungicide sprays should be...
Article
Full-text available
Gemäß vorliegender Analysen wird unter den Bedingungen des luxemburgischen Moseltals jede einzelne der 27 phänologischen Entwicklungsstadien nach BBCHCode in der Zukunft früher im Jahr eintreten als in der Vergangenheit. Während signifikante Änderungen in der Länge der Phänophasen in den frühen Entwicklungsstadien absent sind, verkürzt sich nach vo...
Article
Full-text available
Dr. Daniel Molitor und Dr. Jürgen Junk, LIST – Luxembourg Institute of Science and Technology, nehmen in den folgenden Ausführungen Stellung zu den Herausforderungen, die bedingt durch den Klimawandel für die Eisweinerzeugung entstanden sind.
Article
Full-text available
Changes in the frequency and intensity of heat waves have shown substantial negative impacts on public health. At the same time, climate change towards increasing air temperatures throughout Europe will foster such extreme events, leading to the population being more exposed to them and societies becoming more vulnerable. Based on two climate chang...
Article
Full-text available
Aim: Grape (Vitis vinifera L.) phenology is mainly temperature-driven. Consequently, the shift in thermal conditions due to climate change is supposed to have a distinct influence on grape phenology, grape maturity and wine typicity. This study aims to investigate (i) the future phenological development, as well as (ii) the consequences on the temp...
Article
Full-text available
Am ersten Maiwochenende 2019 kam es entlang der Südlichen Weinmosel auf luxemburgischer wie auf deutscher Seite lokal zu massiven Spätfrostschäden in den Weinbergen. Erste Schätzungen des luxemburgischen Weinbauinstitutes in Remich gehen davon aus, dass im luxemburgischen Anbaugebiet etwa 40-50% der Triebe erfroren sind. Ähnlich gestaltet sich die...
Article
A detailed representation of plant hydraulic traits and stomatal closure in land surface models (LSMs) is a prerequisite for improved predictions of ecosystem drought response. This work presents the integration of a macroscopic root water uptake (RWU) model based on the hydraulic architecture approach in the LSM of the Terrestrial Systems Modeling...
Article
Sets of treatments that were applied against varroa mites in the Luxembourgish beekeeper community were surveyed annually with a questionnaire between the winters 2010/11 and 2014/15. The average temperature and the precipitation sum of the month, when the respective varroa control method was applied were considered as co-variables when evaluating...
Article
Full-text available
Meteorological conditions are important factors in the development of fungal diseases in winter wheat and are the main inputs of the decision support systems used to forecast disease and thus determine timing for efficacious fungicide application. This study uses the Fourier transform method (FTM) to characterize temporal patterns of meteorological...
Article
Full-text available
The EU Water Framework Directive aims to ensure restoration of Europe’s water bodies to “good ecological status” by 2027. Many Member States will struggle to meet this target, with around half of EU river catchments currently reporting below standard water quality. Diffuse pollution from agriculture represents a major pressure, affecting over 90% o...
Article
Air quality and thermal stress lead to increased morbidity and mortality. Studies on morbidity and the combined impact of air pollution and thermal stress are still rare. To analyse the correlations between air quality, thermal stress and morbidity, we used a two-stage meta-analysis approach, consisting of a Poisson regression model combined with d...
Article
Full-text available
Wheat stripe rust (caused by Puccinia striiformis f. sp. tritici) is a major threat in most wheat growing regions worldwide, which potentially causes substantial yield losses when environmental conditions are favorable. Data from 1999 to 2015 for three representative wheat-growing sites in Luxembourg were used to develop a threshold-based weather m...
Article
Climate change will affect wheat crop production both in the main processes of plant growth and development and in the occurrences and severities of plant diseases. We assessed the potential infection periods of wheat leaf rust (WLR) in a changing climate at two climatologically different sites in Luxembourg using a threshold-based model for WLR. F...
Article
Full-text available
Projected climate changes will affect wheat crop production both in the main processes of plant growth and development but also in the occurrences and severities of plant diseases. We assessed the potential infection periods of wheat leaf rust (WLR) at two climatologically differentsites in Luxembourg. A threshold-based model, taking hourlyvalues o...
Conference Paper
Full-text available
The influences of air quality and thermal stress on hospital admissions due to cardiovascular and respiratory diseases are assessed using Poisson regression models combined with distributed lag nonlinear models (DLNMs). The use of corresponding indices is equally suited to the use of single metrics, thus gives the opportunity to facilitate communic...
Article
Projected climate changes will affect wheat crop production both in the main processes of plant growth and development but also in the occurrences and severities of plant diseases. We assessed the potential infection periods of wheat leaf rust (WLR) at two climatologically differentsites in Luxembourg. A threshold-based model, taking hourlyvalues o...
Data
Full-text available
Der prognostizierte Anstieg der Lufttemperaturen lässt eine Verfrühung des Austriebs und der letzten Frostereignisse im Frühjahr erwarten. Dabei zeigen die vorliegenden Datenanalysen, dass dieser Effekt für das Auftreten des letzten Frostes stärker ausgeprägt ist als für den Austrieb. Bis zum Ende des 21. Jahrhunderts ist in den Weinbergen im Mosel...
Article
Wheat stripe rust (WSR) (caused by Puccinia striiformis sp. tritici) i continues to be a major threat in most wheat growing regions of the world, with potential to inflict regular yield losses where susceptible cultivars are grown and when weather conditions are favourable. A recently isolated strain of P. striiformis sp. tritici, ‘warrior’, first...
Article
Wheat stripe rust (WSR) (caused by Puccinia striiformis sp. tritici) i continues to be a major threat in most wheat growing regions of the world, with potential to inflict regular yield losses where susceptible cultivars are grown and when weather conditions are favourable. A recently isolated strain of P. striiformis sp. tritici, ‘warrior’, first...
Article
Wheat stripe rust (WSR) (caused by Puccinia striiformis sp. tritici) i continues to be a major threat in most wheat growing regions of the world, with potential to inflict regular yield losses where susceptible cultivars are grown and when weather conditions are favourable. A recently isolated strain of P. striiformis sp. tritici, ‘warrior’, first...
Poster
Wheat stripe rust (WSR) (caused by Puccinia striiformis sp. tritici) i continues to be a major threat in most wheat growing regions of the world, with potential to inflict regular yield losses where susceptible cultivars are grown and when weather conditions are favourable. A recently isolated strain of P. striiformis sp. tritici, ‘warrior’, first...
Poster
Full-text available
Wheat stripe rust (WSR) (caused by Puccinia striiformis sp. tritici) i continues to be a major threat in most wheat growing regions of the world, with potential to inflict regular yield losses where susceptible cultivars are grown and when weather conditions are favourable. A recently isolated strain of P. striiformis sp. tritici, ‘warrior’, first...
Article
Full-text available
Projected climate change will cause increasing air temperatures affecting human thermal comfort. In the highly populated areas of Western-Central Europe a large population will be exposed to these changes. In particular Luxembourg—with its dense population and the large cross-border commuter flows—is vulnerable to changing thermal stress. Based on...
Article
Agricultural production is directly affected by projected increases in air temperature and changes in precipitation. A multi-model ensemble of regional climate change projections indicated shifts towards higher air temperatures and changing precipitation patterns during the summer and winter seasons up to the year 2100 for the region of Goettingen...
Article
Full-text available
The pollen beetle, Meligethes aeneus F. (Coleoptera: Nitidulidae), is a severe pest of winter oilseed rape. A phenological model to forecast the first spring invasion of crops in Luxembourg by M. aeneus was developed in order to provide a tool for improving pest management and for assessing the potential effects of climate change on this pest. The...
Article
New threshold-based models to predict the start of invasion by the stem-boring pest, the rape stem weevil (Ceutorhynchus napi Gyll.) of winter oilseed rape (WOSR, Brassica napus L.) were developed and compared to published models using long-term datasets on weather and weevil phenology from experimental locations in Germany and Luxembourg. Threshol...
Conference Paper
Full-text available
1. Introduction The rape stem weevil, Ceutorhynchus napi Gyll, (Coleoptera: Curculionidae), is a severe pest in oilseed rape (Brassica napus L.) in Europe and can cause yield losses up to 50% (Williams 2010). Based on a refined model by Debouzie and Wimmer (1992), we analyzed interactions between meteorological variables and pest activity. This ne...
Conference Paper
Our study confirms the general decrease in cold stress as well as the general increase in heat stress for the region of Luxemburg by analysing the bioclimatic indices PET and UTCI in detail. The analysis revealed that the change in stress levels is caused by significant trends in air temperature and relative humidity. Changes in cold stress tend to...
Article
The cabbage stem weevil Ceutorhynchus pallidactylus (Mrsh.) (Col.: Curculionidae) is a common pest in oilseed rape Brassica napus L. throughout Europe. The abundance of the cabbage stem weevil was monitored in field surveys by using yellow water traps between 2007 and 2012 at five locations in Luxembourg. We forecast the abundance of the cabbage st...
Article
Pendlerströme beeinflussen in einem hohen Maβe die lokale Luftqualität im deutsch luxemburgischen Grenzraum. Trendanalysen des Verkehrsaufkommens der letzten 25 Jahre zeigen statistisch hoch signifikante positive Trends. Neben dem arbeitsmarktbedingten Individualverkehr führen steuerliche Vorteile bei Kraftstoffen zu einem stetigen Strom von Tankto...
Article
This study examines the dependencies between emission sources, meteorological conditions and particle mass concentration on different temporal and spatial scales. PM10, PM2.5 and PM1 (Particulate Matter) were measured in an urban area in southwest Luxembourg during two field campaigns carried out between 2008 and 2010. Data sampling at various subu...
Article
To address the incomparability of the large number of existing air quality indices, we propose a new normalization method that is suited to directly compare air quality indices based on the common European World Health Organization (WHO) air quality guidelines for NO2, O3, and PM10. Using this method, we compared three air quality indices based on...
Article
Full-text available
According to projections of climate models, air temperature will increase throughout the twenty-first century. The danger of heat exposure for the population is most severe in highly populated areas. Even relatively moderate levels of heat stress could be associated with adverse health impacts. Luxembourg, due to its high population density, is vul...
Article
Full-text available
A multi-model ensemble of 15 climate change projections from regional climate models was used to assess the impact of changes in air temperature and precipitation on the phenology of pest species in agriculture. This allowed the bandwidths of expected changes in both meteorological variables to be calculated, forming the basis for assessing and cle...
Article
Background and AimsLate frosts are a significant risk to grape production in frost-prone viticultural regions. Increasing air temperature because of climate change is likely to advance grape budburst and last frost events in spring. So far, it is unclear whether one trend will be more pronounced than the other, and hence, whether the risk of late f...
Article
Full-text available
Common cumulative degree day models used to forecast grape growth stages often are only of local va lidity, restricted to a limited number of phenological stages, or do not take into consideration that the forcing effect of temperature is limited at higher temperatures. A new model was developed to simulate all 26 phenological stages (according to...
Data
Full-text available
Die vorliegenden Datenanalysen zeigen, dass in den 70er und 80er Jahren des letzten Jahrhunderts die klimatischen Bedingungen zur optimalen Ausreifung der vorhandenen Rebsorten im Oberen Moseltal (mit Ausnahme von Gunstlagen) häufig nicht gegeben waren. Erst mit einem deutlichen Anstieg der Lufttemperaturen (um ca. 2 °C während der Vegetationsperio...