Gall tissue can girdle twigs and stems of olive trees infected by olive knot bacterium, <i>Pseudomonas savastanoi</i> pv. <i>savastanoi </i> (Psv).
Gall tissue can girdle twigs and stems of olive trees infected by olive knot bacterium, Pseudomonas savastanoi pv. savastanoi (Psv).
Credit: Elizabeth J. Fichtner