Abstract One of the safest methods to reduce Varroa infestation in honey bee colonies is the use of mechanical methods. Dusting or spraying honey bees with some materials (e.g. powdered sugar or oxalic acid solution) can be considered as safe mechanical methods. In this study, the effects of dusting or spraying on the survival rate…
Abstract Honeybee (Apis mellifera) females occur in two castes: workers and one reproductive queen. Caste is nutritionally regulated and only larvae exclusively fed on royal jelly (RJ) develop into queens. Decades of search for a queen ‘determinator’ in RJ found no specific compound, concluding that the discrete feeding regime throughout larval development controlled caste fate.…
Abstract Objectives: To evaluate administration of bee stings at sites of acupuncture on the hormonal profile of patients with idiopathic premature ovarian failure (POF).Study design: A pilot study carried at Obstetrics and Gynaecology Department, Tanta University Hospital, and at the Entomology Unit, Zoology Department, Faculty of Science, Tanta University from June 2015 to December 2015. Patients…
Abstract Deformed wing virus is an important contributor to honey bee colony losses. Frequently queen failure is reported as a cause for colony loss. Here we examine whether sexual transmission during multiple matings of queens is a possible way of virus infection in queens. In an environment with high prevalence of deformed wing virus, queens…
Abstract In this study, honey bees collected in Serbia over 9 consecutive years (2007-2015) were retrospectively surveyed to determine the prevalence of eukaryotic gut parasites by molecular screening of archival DNA samples. We developed species-specific primers for PCR to detect the two known honey bee trypanosomatid species, Crithidia mellificae and the recently described Lotmaria passim. These primers were…
Abstract Honeybee collected pollen exhibits high nutritional and pharmaceutical benefits for the human diet and medicine. Pollen’s antioxidant, anti-ageing, anti-inflammatory, anti-atherosclerosis, and cardioprotective activity, depending on the floral origin, are well known. Recent studies proposed that pollen may also be an excellent cancer-fighting candidate, as pollen harbours high amounts of phenolic substances. In our study,…
Abstract Efficacies of two miticides, Apivar and Thymovar, were evaluated as a fall treatment against V. destructor. The effect of treatment with miticides was further evaluated by monitoring both viral load and rate of indoor overwintering survival of colonies of European honey bees (Apis mellifera L.) in the vicinity of Saskatoon, Saskatchewan, Canada. Forty-five colonies…
Abstract Viral diseases are one of the multiple factors associated with honeybee colony losses. Apart from their innate immune system, including the RNAi machinery, honeybees can use secondary plant metabolites to reduce or fully cure pathogen infections. Here, we tested the antiviral potential of Laurus nobilis leaf ethanolic extracts on forager honeybees naturally infected with BQCV (Black…
Abstract The parasitic mite Varroa destructor is a major pest of the western honeybee, Apis mellifera. The development of acaricide resistance in Varroa populations is a global issue. Discriminating concentrations of acaricides are widely used to detect pest resistance. Two methods, using either glass vials or paraffin capsules, are used to screen for Varroaresistance to various acaricides. We found the glass vial…
Abstract A method for the determination of 200 pesticides and pesticide metabolites in honeybee samples has been developed and validated. Almost 98% of compounds included in this method are approved to use within European Union, as active substances of plant protection products or veterinary medicinal products used by beekeepers to control mites Varroa destructor in…