Transmission of Clavibacter michiganensis subsp. michiganensis in hydroponic cultures
Laboratory studies at the Biologische Zentralanstalt in Germany showed that Clavibacter michiganensis subsp. michiganensis (EPPO A2 pest) is able to survive for several weeks in liquid substrates. An inoculum of 10ý cfu/ml of substrate was sufficient to infect tomato plants via the root in all developmental stages. Yield losses increased with increasing inoculum concentration. In greenhouse experiments on tomato, control of the pathogen was achieved when the nutrient solution was acidified for 12 h to pH 3 once per week.
Griesbach, E.; Lattauschke, E. (1991) šbertragung von Clavibacter michiganensis subsp. michiganensis in Tomaten-Hydroponikkulturen und M”glichkeiten zur Bekumpfung des Erregers.
Nachrichtenblatt des Deutschen Pflanzenschutzdienstes 43, 69-73.