Where in a pistachio tree is Xanthomonas and how did it get there?

Abstract

Xanthomonas translucens has been identified as the probable causal agent of dieback of pistachio (Pistacia vera) in Australia. The bacteria have been regularly isolated from twigs with internal staining from diseased trees. The location of Xanthomonas in other parts of the tree and the identification of possible entry points are the focus of research in progress at the Sunraysia Horticultural Centre (Vic) and the University of Adelaide (SA).