Fig. 13
From: Phony peach disease: past and present impact on the peach industry in the southeastern U.S.A
A Colonies of Xylella fastidiosa subspecies multiplex (Xfm, cause of phony peach disease, PPD) bacterium on PW agar as seen by reflected light through a dissecting microscope (bar = 0.05 mm) (Davis et al. 1981). B Negatively stained bacteria isolated from peach infected with Xfm. The rods are 0.25 to 0.27 by 1.2 to 2.4 μm in size and have furrowed cell walls (magnification × 21,000) (from Wells et al. 1987)