| Summary: | Nosemosis is an intracellular fungus that seriously affects honeybees" health globally.
This study aimed to evaluate and compare the efficacy of thyme, peppermint, eucalyptus
essential oils, and nanoparticle ozone applied by spray on the frames against Nosemosis
in adult honey bees under field conditions. Five treatment groups and two (negative
and positive) control groups were assigned for this study. In treatment groups; the 3%
solutions of thyme, peppermint, and eucalyptus, and the 1.000 and 2.000 ppm solutions
of nanoparticle ozone, were applied four times each week, 125 mL per hive (500 mL
solution in total). Average Nosema spore counts before and after the treatment were
calculated on a Neubauer hemocytometer slide by the digestion method, and the percent
reduction test determined the efficacy of the combinations. According to the results, the
highest reduction in the number of Nosema spores was observed in the thyme essential
oil group at 84%. Peppermint essential oil, eucalyptus essential oil, and 1.000 and 2.000
ppm nanoparticle ozone efficacies were found at 77.45%, 76.10%, 72.41%, and 71.21%,
respectively. Findings from this study revealed that essential oils and nanoparticle ozone
can reduce the Nosema spore load to a point under field conditions. Plant extracts
would offer a non-antibiotic alternative for Nosema control and further studies of herbal
extracts are required as potential Nosema control agents in honey bees.
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