The physiology and ecology of pathogens

The virulent, fluid coloniles on a tetrazolium chloride(TZC) medium with Pseudomonas solanacearum from the bacterial wilt of Anthurium.	The ultrathin section showing Mycoplasma-like organisms(MLO)aggregaed in sieve elements of vein tissue from Bermuda-grass white leaf disease.
Different degress of pear leaf scorch symptoms induced by Xylella fastidiosa.