Why are experts against importing bees to Primorsky Krai - what's the problem?

When bees are brought in from other regions, they can carry local diseases and parasites that the native bees aren't adapted to - this can end up harming the entire population of wild and domesticated bees in the region. It affects both honey production and plant pollination, so honey gets more expensive and crops suffer - it impacts everyone, not just beekeepers.