Impatiens Downy Mildew hits Ohio

From The Ohio State University Extension:

In the last seven to ten days there have been several reports of impatiens downy mildew’s appearance in the midwest; as of this time we have two reports from Ohio. The pathogen that causes the disease, Plasmopara obducens, is extremely aggressive on bedding plant impatiens and Ohio’s impatiens producers should be aware of and scouting for this disease.

Growers should already be utilizing a preventive fungicide schedule as recommended by the floriculture industry. For those growers who are not already on a treatment schedule or those who adopted a wait and see approach, now is the time to implement preventive treatment! But first, discard any plants that are showing symptoms, they cannot be cured and are producing inoculum to infect additional plants.

Read more here.