A5044843934- Insect and Pesticide Research
- Plant and animal studies
- Insect and Arachnid Ecology and Behavior
- Plant Virus Research Studies
- Insect-Plant Interactions and Control
- Animal Disease Management and Epidemiology
- Genetically Modified Organisms Research
- Insect Resistance and Genetics
- Transgenic Plants and Applications
Landesbetrieb Landwirtschaft Hessen
2009-2021
Justus-Liebig-Universität Gießen
2007-2008
Giessen School of Theology
2008
Hessian Agency for Nature Conservation, Environment and Geology
2003-2004
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...
Substantial honey bee colony losses have occurred periodically in the last decades. The drivers for these are not fully understood. influence of pests and pathogens beyond dispute, but addition, chronic exposure to sublethal concentrations pesticides has been suggested affect performance colonies. This study aims elucidate potential effects a (one realistic worst-case concentration) neonicotinoid thiacloprid colonies three year replicated feeding study.
SummaryHoney bee colony losses of the last decade have been alarming. Besides most critical factors, such as parasites and pathogens, claimed to be linked immunodeficiency. For evaluation this suggestion powerful immunological tests are required. The aim study was obtain further data characterize common markers immunity with respect their experimental practicability. Honey bees were challenged by mechanical pathogen-like stressors. These wounding injection buffers acute paralysis virus...
Clothianidin is a commonly used systemic insecticide in seed treatments. Residues of clothianidin can occur nectar and pollen as result within-plant-translocation. Foraging bees collect contaminated or pollen. Concerns have been brought forward that exposure to pesticide residues might affect colonies especially if they are weakened by varroosis. However, there few scientific studies investigating such multiple-stressor scenarios the context entire colony. To close this gapa field trial with...
Abstract Rape ( B rassica napus L.) is foraged intensively by honey bees A pis mellifera ). Pesticide applications during bloom are sometimes combined with foliar boron fertilizer applications. Boron has insecticidal properties, and therefore, risk to cannot be excluded. This study was conducted test whether fertilizers could hazardous for under real field conditions. Six colonies were transferred a rape in which treated (1 kg/ha). control an untreated approximately 7 km away. Performance...
Abstract Co-evolution between parasites and their host can lead to dramatic changes in the life history of species. In this study we tested male mating success 31 honeybee (Apis mellifera) colonies infested with brood parasitic mite Varroa destructor analysed consequences sexual reproduction on colony survival a closed population Mediterranean island. We found that which successfully reproduced via males had significantly increased mortality during following season. They also showed higher...
Pollen substitutes are used extensively by German beekeepers and soyabeans a predominant ingredient in some of these products. Around 40% global soyabean production is harvested from GM- varieties. Thus, pollen as well the honey produced bee colonies fed with them might contain GM-soyabean particles. We checked this assumption found that 23 honeys 389 samples contained powdered soyabeans. Eleven soya-containing four 11 tested study transgenic material. did not elucidate contamination pathway...
Abstract Abundance and diversity of pollinating insects are decreasing. Intensification agricultural bioenergy production is presumed to accelerate the decline pollinators. Sorghum ( bicolor L. Moench) a promising crop. Enhanced dual‐purpose type cultivars have been developed tested for suitability cropping in Germany. assumed be nutritional resource pollen‐collecting insects. To evaluate this assumption, we studied foraging strategy A . mellifera colonies, which were migrated sorghum fields...