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This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License
Article
Author(s)
Adrian Siceanu, Eliza Căuia, Gabriela Oana Vișan and Dumitru Căuia
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DOI:10.17265/2161-6256/2019.04.005
Affiliation(s)
Department of Honeybee Genetics and Breeding, Institute for Beekeeping Research and Development, Bucharest 013975, Romania
ABSTRACT
The objective of the study was to establish the
effect of formic acid on varroa (Varroa
destructor), inside the capped brood cells, artificially decapped. The
experiments were carried out in 2017-2018
on honeybee colonies infested with varroa (V. destructor), in a research
apiary belonging to the Institute for Beekeeping Research and Development in
Bucharest. The decapping method in the present researches used the decapping
fork to scrape the capped comb, without affecting the brood, in order to open
it for an effective treatment. The combined treatment method was applied on
honeybee colonies as a whole, as well as on brood combs, without bees, put in a
special treatment box. The researches were focused on establishing the
mortality level of various stages of varroa in artificially decapped brood, in
normal colony and separately, as well as to make observations on
the
effect of formic acid on viability of capped bee brood, artificially decapped.
The results show a high mortality of varroa, especially the protonymphs and
deutonymphs stages (over 80%). The main conclusion is that the brood decapping
method combined with formic acid treatment could
be a useful technique to control varroa infestation, both in brood and honeybees,
shortening strongly the treatment duration as compared to the usual treatments,
increasing the efficacy of treatment by cutting the life cycle of varroa in
brood.
KEYWORDS
Varroa (Varroa destructor), honeybee (Apis mellifera), brood, artificial decapping, formic acid.
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