Diagnosis and prevention of Xanthomonas fragariae in strawberry crop.


Bacterial leaf spot in strawberry occurs in open field cultures and is caused by the quarantine bacterium Xanthomonas fragariae. The disease is recently spreading in Flemish strawberry nurseries, in spite of its quarantine status. In 1997, the experimental station of Hoogstraten made the first observation in 15 different production companies, and in 2003-2004 already 20 to 25 % of the companies had infection. Not only the spread, but also the severity of the disease increases. In case of severe outbreak, also the petals show disease spots, which makes the fruit unmarketable. Open field cultivation in combination with a highly susceptible host, as the current CV Elsanta, is leading to a further spread of the disease and higher losses. In order to prevent this, we need clear identification of the Xf-problem in Flanders and development of effective measures to stop new pathogen introductions via latently infected planting material and to suppress existing contamination of field soils. This projects focuses on the symptomless survival of the pathogen in plants and planting material and on reliable detection of these infections. It is a collaboration between the Institute for Agricultural and Fisheries Research (ILVO), Laboratory of Microbiology at Ghent University(LM-UGent), and the experimental stations of Hoogstraten and St-Truiden. Partner LM-UGent is involved in the isolation and typing of Xanthomonas fragariae isolates from strawberry plants to elucidate sources of contamination and unravel correlations between infection and cultivation variables (e.g. cultivar).

Run time: 
01/09/2007 to 31/08/2012
Coordinator Extern: 
Dr. Tine Maes
Project titel (NL): 
Diagnose en preventie van Xanthomonas fragariae in aardbeigewassen.
Project omschrijving (NL): 

Geen Nederlandse beschrijving beschikbaar.