Xylella fastidiosa is not your ordinary kind of bug. It made it to the list of the most wanted plant pathogenic bacteria in 2012! This is well deserved: X. fastidiosa can infect over a hundred species (grapevine, oleander, citrus, almonds,…), and it causes severe symptoms that can kill the infected plant. TheXylella bacteria colonize the xylem vessels, and by doing so they block the transport of water in the plant. The water-deprived leaves dry and scorch, until finally they drop to the ground.
Check also the video on the glassy-winged sharpshooter leafhopper.
Via Kamoun Lab @ TSL, Mary Williams