PSEUDOMONAS SYRINGAE pv ACTINIDIAE IN NEW ZEALAND
There are several populations of Pseudomonas syringae pv. actinidiae (Psa) that differ in virulence, in genetic characteristics, and in phenotypic characters. Primary concern is with highly virulent strains, here called Psa –V. They cause most damage in gold fruit cultivars of Actinidia chinensis. So far, attempts to manage the disease by pruning, by sprays and by other measures have been unsuccessful.