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Sublethal effects of chronic exposure to CdO or PbO nanoparticles or their binary mixture on the hon

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Cadmium and lead-based nanotechnologies are increasingly used in agricultural, industrial, and biological processes; however, potential adverse effects of nanomaterials on honey bees had not been assessed. In this study, effects of exposures to sublethal concentrations of PbO and CdO nanoparticles (NPs), either separately or in combination on honey bee (Apis mellifera) workers, were assessed. Honey…

Cellular alterations in midgut cells of honey bee workers (Apis millefera L.) exposed to sublethal c

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Beside many beneficial applications in industry, agriculture and medicine, nanoparticles (NPs) released into the environment might cause adverse effects. In the present study, effects of exposure to sublethal concentrations of PbO and CdO NPs, either separately or in combination on honey bee (A. mellifera) workers were assessed. Honey bee workers were fed sugar syrup contained…

Next-generation sequence data demonstrate several pathogenic bee viruses in Middle East and African

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Reference: Haddad, N., Horth, L., Al-Shagour, B., Adjlane, N., & Loucif-Ayad, W. (2018). Next-generation sequence data demonstrate several pathogenic bee viruses in Middle East and African honey bee subspecies (Apis mellifera syriaca, Apis mellifera intermissa) as well as their cohabiting pathogenic mites (Varroa destructor). Virus genes, 1-12. RNA viruses are associated with honey bee (Apis…

Morphometric identification of Varroa destructor and its plasticity by the exposure to thymol

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Currently, there are four Varroa species identified worldwide, which present a high interspecific and intraspecific variability. The objective of this investigation was to identify the predominant species of Varroa and the effect of thymol on the plasticity of the mite. To determine the species and effect of thymol on the plasticity of the mite, 150…

Characterization of Apis mellifera honey from different botanical and geographical origins in Egypt

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Seven bee honey types identified botanically in terms of their floral origin (Clover, Cedrus, Citrus, Banana, Cotton, Brazilian pepper, and Sun flower), and their geographical regions during 2016 – 2017 have been characterized in comparison with artificial honey. Characterization of honeys was based on their physicochemical properties, antimicrobial activity, heavy metal contents and multi-pesticides residues…

Virulence of M. plutonius and secondary invaders associated with European foulbrood disease

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European foulbrood is a globally distributed brood disease affecting honey bees. It may lead to lethal infections of larvae and, in severe cases, even to colony collapse. Lately, a profound genetic and phenotypic diversity was documented for the causative agent Melissococcus plutonius. However, experimental work on the impact of diverse M. plutonius strains on hosts with…

Multi-country loss rates of honey bee colonies during winter 2016/17 from the COLOSS survey

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Reference: Brodschneider, Gray, Adjlane, Ballis, Brusbardis, Charrière, Chlebo, Coffey, Dahle, de Graaf, Dražić, Evans, Fedoriak, Forsythe, Gregorc, Grzęda, Hetzroni, Kauko, Kristiansen, Martikkala, Martín-Hernández, Medina-Flores, Mutinelli, Raudmets, Ryzhikov, Simon-Delso, Stevanovic, Uzunov, Vejsnæs, Woehl, Zammit-Mangion, Danihlík (2018) Multi-country loss rates of honey bee colonies during winter 2016/17 from the COLOSS survey. Journal of Apicultural Research, 57(3), 452-457.…