The world’s bees face a major threat from deformed wing virus, a pathogen transmitted by the parasitic varroa mite. It is responsible for causing the death of millions of colonies in the US, Europe and Asia. The major losses started in the early 1990s with at least 30% of colonies dying each year.
Click here for original story, Bees, mites and viruses: Assessing the risk to South African crop pollinators
Source: Phys.org