If President Donald Trump follows through on his threat to close the U.S. border with Mexico, the nation's avocado supply would dry up in less than a month.

News agency

pointed out that, using United States Department of Agriculture data, nearly half all imported vegetables and 40 percent of imported fruit come from Mexico.

That includes tomatoes, cucumbers, blackberries and raspberries to go along with avocados.

“You couldn’t pick a worse time of year because Mexico supplies virtually 100 percent of the avocados in the U.S. right now,” Steve Barnard of Mission Produce told Reuters. “California is just starting and they have a very small crop, but they’re not relevant right now and won’t be for another month or so.”

Last Friday, Trump said there was a “very good likelihood” he would close the border this week if Mexico did not stop immigrants from reaching the U.S.