How new diseases are destroying EU trees and crops
The plants slowly choke to death, wither and dry out. They die en masse, leaves dropping and bark turning grey, creating a sea of monochrome. Since scientists first discoveredXylella fastidiosain 2013 in Puglia, Italy, it has killed a third of the region’s 60 million olive trees – which once produced almosthalf of Italy’s olive oil– many of which were centuries old.