Influence of Virus Abundances in Donor Colonies and Nurse Hives on Queens of During the Rearing Process

Overview

Journal Open Vet J

Specialty Veterinary Medicine

Date 2023 Aug 24

PMID 37614729

Authors

Hannes Beims

Martina Janke

Werner von der Ohe

Michael Steinert

Affiliations

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Abstract

Background: Honeybees are one of the three most important animals for mankind. In order to be safe and increase number of bee colonies for pollination, the breeding of queens is necessary. For several decades, bees were selected on economic and behavioral aspects. With the appearance of the neozootic mite beekeepers were forced to adapt their methods. can act as a vector for many different bee pathogenic viruses and by this potentiates its devastating impact.

Aim: Methods of rearing queens were not evaluated since the mites' appearance. Besides scientific approaches, viruses received too little attention in regard to the rearing process of honeybee queens. Herein, we present a detailed analysis of virus abundances [, acute bee paralysis virus (ABPV); Triatovirus, black queen cell virus (BQCV); , chronic bee paralysis virus (CBPV); and , deformed wings virus (DWV), Sacbrood virus (SBV), VDV-1] in breeding hives, donating first instar larvae, hives that are nursing these larvae until the pupa stage, and on queens of in a breeding apiary.

Methods: Nurse and donor colonies of the queen-rearing process were sampled in the year 2020 and analyzed by RT qPCR. Virus quantifications were correlated with queen mortalities and seasonal effects.

Results: Virus detections increased in reared queens, however, the elevated virus titers did not increase the mortality of the queens until their exclosure. Moreover, we observed a lower interrelation between virus abundance in queens and their original donor colonies, than between nurse hives and their nursed queens.

Conclusion: The bee pathogenic viruses ABPV, BQCV, CBPV, DWV, SBV, and VDV-1 do not influence the mortality of bee queens during the rearing process. Whether respective virus loads result in sublethal or long-term effects remains to be elucidated.

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