Ralstonia solanacearum detected in surface water in Egypt
In Egypt, recent studies have shown that Ralstonia solanacearum biovar 2 race 3 (EPPO A2 quarantine pest) is present in surface water. The bacterium was identified in both irrigation and drainage canals near infected fields within traditional potato-growing areas in the Nile delta. These areas are known to be infested by the bacterium. Populations could reach up to 106 cfu L-1. Samples taken from desert areas were all negative. Weeds were also studied. Solananum dulcamara was not found along irrigation canals or Nile branches. All tested samples of S. nigrum were negative.
Sources
Farag, N.; Stead, D.E.; Janse, D. (1999) Ralstonia (Pseudomonas) solanacearum race 3 biovar 2, detected in surface (irrigation) water in Egypt.
Journal of Phytopathology, 147(7-8), 385-496.