A5042791621- Insect and Pesticide Research
- Plant and animal studies
- Insect and Arachnid Ecology and Behavior
- Insect-Plant Interactions and Control
- Insect Resistance and Genetics
- Insect behavior and control techniques
- Bee Products Chemical Analysis
- Animal Behavior and Welfare Studies
- Insect symbiosis and bacterial influences
- Animal and Plant Science Education
- Marine and environmental studies
- Carcinogens and Genotoxicity Assessment
- Genetic Mapping and Diversity in Plants and Animals
- Botanical Research and Chemistry
- Nutrition, Genetics, and Disease
- Botany and Plant Ecology Studies
- Zoonotic diseases and public health
- Geological Studies and Exploration
- Digestive system and related health
- thermodynamics and calorimetric analyses
Landesbetrieb Landwirtschaft Hessen
2016-2025
Washington State University
2000-2009
Goethe University Frankfurt
1993-2009
Martin Luther University Halle-Wittenberg
2004
InLeaVe
2003
SummaryThe natural diversity of honey bees in Europe is eroding fast. A multitude reasons lead to a loss both genetic and specific adaptations local conditions. To preserve locally adapted through breeding efforts maintain regional strains conservation areas, these valuable populations need be identified.In this paper, we give an overview methods that are currently available used for recognition bee subspecies ecotypes, or can utilised verify the origin colonies purposes. Beyond summarising...
SummaryThe survival and performance of 597 honey bee colonies, representing five subspecies 16 different genotypes, were comparatively studied in 20 apiaries across Europe. Started October 2009, 15.7% the colonies survived without any therapeutic treatment against diseases until spring 2012. The duration was strongly affected by environmental factors (apiary effects) and, to a lesser degree, genotypes origin queens. Varroa identified as main cause losses (38.4%), followed queen problems...
SummaryBeekeepers in Europe, North America and other parts of the world have repeatedly been afflicted by elevated sometimes unexplained colony losses. Multiple factors considered connection with increased winter In addition to national programmes investigating possible causes for honey bee mortality, scientists collaborate at an international level on different aspects health within COLOSS network. Within this network, Working Group 4 explores genetic diversity relation vitality...
SummaryAdaptation of honey bees to their environment is expressed by the annual development pattern colony, balance with food sources and host—parasite balance, all which interact among each other changes in environment. In present study, we analyse patterns over a period two years colonies belonging 16 different genotypes placed areas grouped within six environmental clusters across Europe. The were maintained no chemical treatment against varroa mites. aim study was investigate presence...
SummaryDiseases are known to be one of the major contributors colony losses. Within a Europe-wide experiment on genotype—environment interactions, an initial 621 colonies were set up and maintained from 2009 2012. The monitored investigate occurrence levels key pathogens. These included mite Varroa destructor (mites per 10 g bees), Nosema spp. (spore loads species determination), viruses (presence/absence acute bee paralysis virus (ABPV) deformed wing (DWV)). Data 2010 spring 2011 analysed...
Abstract Queen health is crucial to colony survival of honeybees, since reproduction and growth rely solely on the queen. failure considered a relevant cause losses, yet few data exist concerning effects environmental stressors queens. Here we demonstrate for first time that exposure field-realistic concentrations neonicotinoid pesticides can severely affect immunocompetence queens western honeybees ( Apis mellifera L.). In young exposed thiacloprid (200 µg/l or 2000 µg/l) clothianidin (10...
SummaryHoney bee colonies exhibit a wide range of variation in their behaviour, depending on genetic origin and environmental factors. The COLOSS Genotype-Environment Interactions Experiment gave us the opportunity to investigate phenotypic expression swarming, defensive hygienic behaviour 16 genotypes from five different honey subspecies various conditions. In 2010 2011, total 621 were monitored tested according standard protocol for estimation these three behavioural traits. factors: year,...
Abstract Deformed wing virus is an important contributor to honey bee colony losses. Frequently queen failure reported as a cause for loss. Here we examine whether sexual transmission during multiple matings of queens possible way infection in queens. In environment with high prevalence deformed virus, (n = 30) were trapped upon their return from natural mating flights. The last drone’s endophallus 29), if present, was removed the mated quantification, leading detection high-level 3...
Most Varroa induced colony losses occur during the autumn or winter season as a consequence of an elevated infestation level and insufficient health status adult bees. Even with initial low in early spring, critical mite virus infection levels can be reached before if colonies continuously rear brood throughout whole season. To overcome this challenge, beekeepers artificially interrupt production by suitable management procedures, depending on their type beekeeping operation. assess...
With numerous endemic subspecies representing four of its five evolutionary lineages, Europe holds a large fraction Apis mellifera genetic diversity. This diversity and the natural distribution range have been altered by anthropogenic factors. The conservation this heritage relies on availability accurate tools for diagnosis. Based pool-sequence data from 2145 worker bees 22 populations sampled across Europe, we employed two highly discriminative approaches (PCA FST) to select most...
Deformed wing virus (DWV) is an important pathogen in a broad range of insects, including honey bees. Concordant with the spread Varroa, DWV present majority bee colonies and can result either low-level infections asymptomatic bees that nonetheless exhibit increased colony loss under stress, or high-level acute effects on health viability. be transmitted vertically horizontally evidence suggests horizontal transmission via Varroa associated symptomatic infections. Vertical also occurs...
We used radio-frequency identification (RFID) to record the duration and frequency of nuptial flights honey bee queens (Apis mellifera carnica) at two mainland mating apiaries. investigated effect a number factors on flight frequency: apiary, drone colonies, queen’s age temperature. found significant differences between locations concerning first three days. also observed an ambient temperature, with flying less often but longer high temperatures compared lower temperatures. Increasing...
In the fight against Varroa destructor mite, selective breeding of honey bee (Apis mellifera L.) populations that are resistant to parasitic mite stands as a sustainable solution. Selection initiatives indicate using suppressed reproduction (SMR) trait selection criterion is suitable tool breed such populations. We conducted large European experiment evaluate SMR in different bees spread over 13 countries, and representing genotypes with their local parasites. The first goal was standardize...
The Varroa destructor mite's transmission of deformed wing virus (DWV) to honey bees is responsible for most winter mortalities colonies worldwide. Four DWV genotypes (A, B, C and D) numerous recombinants have been described. recent studies reported the greater prevalence DWV-B over DWV-A in several countries, including European ones, while D appear rare or extinct. However, no global evaluation distribution was available at level date. In this study, we quantified both by real-time PCR from...
Abstract Genetic diversity levels within and between the two commercial breeding areas in United States were analyzed using DraI restriction fragment length polymorphism of COI-COII mitochondrial region 10 polymorphic microsatellite loci. The western population (WCBP) southeastern (SCBP) sampled 1993–1994 again 2004–2005. goal this study was to characterize genetic composition these populations measure potential changes across sampling period. DNA haplotypes C1 C2, characteristic most...
A Europe-Wide Experiment for Assessing the Impact of Genotype-Environment Interactions on Vitality and Performance Honey Bee Colonies: Experimental Design Trait Evaluation An international experiment to estimate importance genotype-environment interactions vitality performance honey bees colony losses was run between July 2009 March 2012. Altogether 621 bee colonies, involving 16 different genetic origins European bees, were tested in 21 locations spread 11 countries. The strains belonged...
Click to increase image sizeClick decrease sizeKeywords: COLOSSGenotype-Environment Interactions experimentApis mellifera
Honey bee virus prevalence data are an essential prerequisite for managing epidemic events in a population. A survey study was carried out seven viruses colonies representing healthy Danish honey In addition, from apiaries with high level Varroa infestation or of winter mortality were also surveyed. Results RT-qPCR showed considerable difference levels between and sick colonies. the group colonies, no detected 36% cases, while at least one found each Virus titers varied among samples,...