TO GO WITH AFP STORY BY PIERRE LANFRANCHI A picture taken on November 4, 2014, shows olive trees in Sainte-Lucie-de-Tallano in the French Mediterranean island of Corsica. Corsica is on alert to protect olive trees against a killer bacteria coming from Italy, the Xylella fastidiosa, which has already wreaked havoc in the Italian region Apulia (Puglia) and threatens the entire Mediterranean orchard. AFP PHOTO / PASCAL POCHARD-CASABIANCA (Photo credit should read PASCAL POCHARD-CASABIANCA/AFP/Getty Images)
