Survival of brown rot and disinfection of surface water. The survival of the brown rot bacteria (Pseudomonas solanacearum) in several substrates and the efficiency of several methods for the disinfection of surface water.
A study was carried out in the Netherlands to investigate the survival of Pseudomonas [Ralstonia] solanacearum (biovar 2, strain 3) in ditch water, ditch sediment, dry chicken manure, cattle manure, sediment and waste water (with low or high levels of proteins and starch) of the potato processing industry, and filter cake (a waste product of sugarbeet industry). The influence of dry (day/night, room temperature, open pot) and non dry (dark, 4°C, closed pot) conditions on survival were also investigated. Dry conditions decreased the survival period of the bacteria. Survival on wood, metal and rubber was also tested. The maximum survival period on wood was very short (4 days) compared with metal (14 days) and rubber (55-87 days). The disinfection of surface water after a 15 minute application of maneb, hydrogen peroxide, hydrogen peroxide + acetic acid, and calcium hypochlorite was measured in the laboratory. Maneb and hydrogen peroxide were not effective in disinfecting contaminated water.