Efficacy of novel nano-acaricide formulations and treatment frequency for the control of the mite Varroa destructor in honey bee colonies

Lead Applicant: Ernesto Gusman

Research Priority: Animal Health & Welfare

Program Type: Tier 1

Funding Cycle: 2025/2026

Research Centre: NA

Research Summary: More than half of Ontario's honeybee colonies were lost in 2023. The main cause is a harmful mite called Varroa destructor, which is usually controlled with chemicals. However, mites can become resistant to these treatments and the chemicals may affect honey and bees. Scientists have tested natural treatments, but they do not work as well and can still harm bees. A new method is needed to make treatments stronger, safer, and spread evenly in beehives. Researchers are testing new natural treatments in nano-emulsions to see if they work better. These solutions could help beekeepers protect their bees and reduce colony losses.