We've heard talk on the Xylella fastidiosa creating havoc around Italy and other countries. Olive trees are dying, other crops like vines and lavender (and about 300 more) are also affected and in a number of other Southern European countries the decease had been detected. At the same time Northern neighbour countries are dead scared to get the bacteria within its own boarders, therefore taking very strict preventive measurements.
Check out the richly illustrated article at National Geographic