Naslov
Queen caging with emphasis on honey production during summer - preliminary results

Autori
Kovačić, Marin ; Uzunov, Aleksandar ; Adjlane Noureddine ; Benko, Valerija ; Charistos, Leonidas ; Dall'Olio, Raffaele ; Formato, Giovanni ; Freda, Fabrizio ; Hatjina, Fani ; Kabakci, Dilek ; Malagnini, Valeria ; Otmi, Asaf ; Pietropaoli, Marco ; Puškadija, Zlatko ; Soroker, Victoria ; Tlak Gajger, Ivana ; Ivgin Tunca, Rahsan ; Villar, Claudio ; Buchler, Ralph

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, prošireni sažetak, znanstveni

Izvornik
17th COLOSS eConference / Williams, Geoff ; Shabel, Allyson ; Rowe, Jack ; Bouga, Maria ; Maehl, Jan - , 2021, 31-31

Skup
17th COLOSS Conference (2021 COLOSS eConference)

Mjesto i datum
Bern, Švicarska, 14.10.2021. - 15.10.2021

Vrsta sudjelovanja
Predavanje

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
bees ; queen caging ; honey ; colony

Sažetak
Different brood interruption methods combined with chemical treatment may successfully remove most V. destructor from the honey bee colonies. Further, the timely brood reduction or break may positively impact nectar intake and is occasionally used by beekeepers during the main spring flow to increase honey production. However, the experience and data on the effect of brood break on honey production during the main summer flow are scarce or contradictory. To try to find an answer, several Varroa Task Force members started an experiment in 2021. The study takes place at 10 apiaries in 7 countries (Algeria, Croatia, Greece, Israel, Italy, Spain and Turkey). At each location, three different groups with at least 5 colonies per group were established. In two groups, queens were confined for 28 days in a small cage 28 (QC1) or 14 (QC2) days before the expected main summer honey harvest. The third group (C) of colonies had free laying queens to serve as a control group. In total 207 colonies are included in this year study. All colonies were evaluated for strength (number of frames with bees and brood) every 14 days after the experiment started. The net weight of extracted honey for each colony was measured. Adult bee infestation was measured at the beginning of the experiment and 42 days after the treatment of the control group. Queen caging groups were treated by OA trickling 28 days from the day of queens’ caging. The C group was treated by each partner using usual practices. At the beginning of experiment, there was no difference in colony strength between groups (ANOVA, F (2, 206) = 0.030, p = 0.971). A number of frames occupied with bees was significantly lower in QC groups comparing to C group 42 days after the caging but not 56 days after caging. Briefly, they started and finished with equal strength. Further, there was no significant difference in adult bee infestation at the beginning of the trial. However, at the last measurement (42 days after the treatment of QC1 and C group and 28 days after the treatment of QC2 group) significant differences are found (H = 12.825, p = 0.002). Namely, QC1 group had lower infestation comparing to C group. In the analysis of honey production, apiary and group as fixed factors were used in the model. Apiary as a factor had significant effect (GLM, F (9, 206) = 64.921, p < 0.001) with wide distribution of extracted honey between apiaries (average from 1.45 kg to 29.50 kg/apiary). Significant differences between groups are found (F (2, 206) = 4, 556, p=0.012), with group QC1 having lower amount of extracted honey comparing to QC2 and C groups. No significant differences were found between QC2 and C group. Preliminary results showed that QC1 group had a significantly lower final infestation, as well as honey production. On the other hand, QC2 group had the same amount of produced honey and final infestation as a control group. Measurements of colony strength before and after wintering period are planned.

Izvorni jezik
Engleski

Znanstvena područja
Biologija, Interdisciplinarne prirodne znanosti, Veterinarska medicina

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