Varroa destructor

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COLOSS members detect Tropilaelaps mite in Georgia and propose new detection method

COLOSS members confirm the first findings of the harmful Tropilaelaps mercedesae mite in Western Georgia. Infested honey bee colonies in three different apiaries showed high levels of infestation. In these colonies, T. mercedesae was found together with the harmful mite, Varroa destructor, both showing high reproductive success. This discovery raises alarms for beekeeping in Georgia…

Tropilaelaps mite found in Georgia, the mite is spreading!

COLOSS members confirm the first findings of the harmful Tropilaelaps mercedesae mite in Western Georgia. Infested honey bee colonies in three different apiaries showed high levels of infestation. In these colonies, T. mercedesae was found together with the harmful mite, Varroa destructor, both showing high reproductive success. This discovery raises alarms for beekeeping in Georgia…

Contact varroacidal efficacy of lithium citrate and its influence on viral loads, immune parameters and oxidative stress of honey bees in a field experiment

With an almost global distribution, Varroa destuctor is the leading cause of weakening and loss of honey bee colonies. New substances are constantly being tested in order to find those that will exhibit high anti-Varroa efficacy at low doses/concentrations, without unwanted effects on bees. Lithium (Li) salts stood out as candidates based on previous research.…

Temporal increase of Varroa mites in trap frames used for drone brood removal during the honey bee season

Abstract Varroa mites are highly attracted to drone brood of honey bees (Apis mellifera), as it increases their chance of successful reproduction. Therefore, drone brood removal with trap frames is common practice among beekeepers in Europe and part of sustainable varroa control. However, it is considered labour-intensive, and there are doubts about the effectiveness of…

Graduate student (MS or PhD) Honey bee integrated pest management with focus on “Varroa destructor”

Application deadline: Review of applications will begin on Monday, March 7th, and will continue until a suitable candidate is found. Start date: Flexible, with Summer 2022, Fall 2022, and Winter 2023 semesters all possible. Project description and responsibilities: The selected individual will participate in collaborative research alongside USDA ARS bee labs (e.g., Stoneville, MS; Beltsville,…

Efficacy and Toxicity of VarroMed® Used for Controlling Varroa destructor Infestation in Different Seasons and Geographical Areas

VarroMed® is a soft acaricide registered for honey bees on the European Union market since 2017 for Varroa control. Researchers involved were partners of different countries of the Varroa control task force of the COLOSS Association. Our goal was to evaluate performances (acaricide efficacy and toxic effects on honey bees) of VarroMed® in different climatic…