Dutch Food Safety Authority researches brown rot infection in roses
The reason for the research is the discovery of brown rot bacterium at two rose growers in the province of South Holland in August 2015. At the rose growers, race 1 of the brown rot bacterium was detected. This is a different race than the race that is known in potato diseases in the Netherlands (race 3). Roses were not previously known as a host of the brown rot bacterium.
Right now the NVWA is conducting further investigation at two plant breeders and five growers, into the extent and source of the contamination. For this NVWA has taken samples from the plants and the water system of these companies. These samples are examined at the National Reference Laboratory of the NVWA. This investigation may take several weeks. Depending on the outcome NVWA decides whether it is necessary to do research in other companies.
Until all the samples are analysed, no propagating material from the relevant plant breeders may be marketed. Affected growers may only bring cut flowers on the market when the NVWA has determined that no symptoms of brown rot can be seen on the plants.
If according to the laboratory of the NVWA plants or the water system of a producer or grower is infected with brown rot, they must destroy the infected plants and clean and disinfect all materials and surfaces that may have been in contact with the bacterium. This is done under the supervision of the NVWA.
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Bron: NVWA-mededelingen plantenziekten en plagen | 02 oktober 2015 / Naktuinbouw
