From the Telegraph:

Almost a third of global farm output depends on animal pollination, largely by honey bees.

Albert Einstein, who liked to make bold claims (often wrong), famously said that "if the bee disappeared off the surface of the globe, man would have only four years to live".

Such "apocalyptic scenarios" are overblown, said Rabobank. The staples of corn, wheat, and rice are all pollinated by wind.

However, animal pollination is essential for nuts, melons and berries, and plays varying roles in citrus fruits, apples, onions, broccoli, cabbage, sprouts, courgettes, peppers, aubergines, avocados, cucumbers, coconuts, tomatoes and broad beans, as well as coffee and cocoa.

This is the fastest growing and most valuable part of the global farm economy. Between 80pc and 90pc of pollination comes from domesticated honey bees. Moths and butterflies lack the range to penetrate large fields.

Einstein was right - honey bee collapse threatens global food security