If the varroa mite and the various viruses weren’t enough, there is a new honey-bee parasite spreading around the world that may be deadlier than varroa.
For decades, beekeepers have fought a tiny parasite called Varroa destructor, which has devastated honey-bee colonies around the world. But an even deadlier mite, Tropilaelaps mercedesae – or “tropi” – is on the march. Beekeepers fear it will wreak even greater havoc than varroa – and the ripple effects may be felt by the billions of people around the world who rely on honey bee-pollinated plants.
It has now been detected in Ukraine, Georgia and southern Russia, and is suspected to be in Iran and Turkey. From there, it is expected to enter eastern Europe, then spread across the continent.
https://theconversation.com/deadlier-than-varroa-a-new-honey-bee-parasite-is-spreading-around-the-world-264891
Since there are no natural borders against them there, it can most certainly spread over Europe and Asia where the climate is suitable, but jumping to a new continent must involve some kind of transport.