Honey bee colony winter loss rates for 35 countries participating...

Abstract This article presents managed honey bee colony loss rates over winter 2018/19 resulting from using the standardised COLOSS questionnaire in 35 countries (31 in Europe). In total, 28,629 beekeepers supplying valid loss data wintered 738,233 colonies, and reported 29,912 (4.1%, 95% confidence interval (CI) 4.0–4.1%) colonies with unsolvable queen problems, 79,146 (10.7%, 95% CI…

New paper: Dietary quercetin impacts the concentration of pesticides in...

Highlights: Honey bees orally exposed to imidacloprid exhibit reduced metabolism of quercetin. Dietary quercetin reduces the con- centration of imidacloprid absorbed in honey bees. Dietary quercetin does not affect the concentration of tebuconazole or tau-fluvalinate in contact-exposed honey bees. Free download for until 20th September 2020 https://www.sciencedirect.com/science/article/pii/S0045653520320439?dgcid=coauthor

Bee Viruses: Routes of Infection in Hymenoptera

Numerous studies have recently reported on the discovery of bee viruses in different arthropod species and their possible transmission routes, vastly increasing our understanding of these viruses and their distribution. Here, we review the current literature on the recent advances in understanding the transmission of viruses, both on the presence of bee viruses in Apis…

The Apis mellifera mellifera population in Denmark

Carl-Johan Junge a beekeeper in Denmark has made a beautiful video about the bees and the beeekeepers dedicated to their conservation on the island of Læsø. First a brief introduction to the bee (Apis mellifera mellifera) and their morphological characters. Honey on Læsø is mostly from heather (Calluna vulgaris). The bees are dark and a…

Effects of coumaphos and imidacloprid on honey bee (Hymenoptera: Apidae)...

Abstract. The main objective of this study was to test comparatively the effects of two common insecticides on honey bee Apis mellifera worker’s lifespan, food consumption, mortality, and expression of antioxidant genes. Newly emerged worker bees were exposed to organophosphate insecticide coumaphos, a neonicotinoid imidacloprid, and their mixtures. Toxicity tests were conducted along with bee…

Hydroxymethylfurfural Affects Caged Honey Bees

Abstract. A high concentration of hydroxymethylfurfural (HMF) (e.g., 15 mg HMF per kg honey) indicates quality deterioration for a wide range of foods. In honey bee colonies, HMF in stored honey can negatively a_ect bee health and survival. Therefore, in the laboratory, we experimentally determined the effects of HMF on the longevity and midgut integrity…

Lethal and sublethal synergistic effects of a new systemic pesticide,...

Abstract The honeybee (Apis mellifera L.) is an important pollinator and a model for pesticide effects on insect pollinators. The effects of agricultural pesticides on honeybee health have therefore raised concern. Bees can be exposed to multiple pesticides that may interact synergistically, amplifying their side effects. Attention has focused on neonicotinoid pesticides, but flupyradifurone (FPF)…