First record of Plasmopara obducens in Slovenia
Impatiens downy mildew, Plasmopara obducens (EPPO Alert List) has been found for the first time in Slovenia on Impatiens walleriana plants. Severe infections were observed in 2 glasshouses in Primorska region (Western littoral area of Slovenia). In both cases, affected plants had been imported from the same Italian producer from Veneto region. In the first case, more than half of the lot was killed (lot of 4000 plants), in the second case 10% of the lot showed symptoms (lot of 3960 plants). Eradication measures were taken immediately. All infected plants were destroyed and the remaining ones were placed under quarantine and treated with a fungicide (metalaxyl). Further monitoring has been imposed.
The situation of Plasmopara obducens in Slovenia can be described as follows: Present, found in 2008 on Impatiens walleriana in 2 glasshouses in Primorska region, under eradication.
NPPO of Slovenia, 2008-04.