I heard a radio program this morning (Mike Nowak WCPT) about how the entire impatients walleriana crop is being wiped out by downy mildew that seems to be caused by the erratic weather we've experienced lately. It is very serious. If you see the symptoms described on his website, ("Mike Nowak Show" than go to the "This Weeks Show" button on the left side of the page) light gray fuzz on the UNDERSIDES of the leaves and deterioration of the plant, he says to immediately carefully pull the plant(s) and put it in a plastic bag - do not carry it over your garden. Try not to let it get into the soil more than absolutely necessary as it infects the soil and stays there. Put it into the municipal garbage, never your compost.

Mikes guest describes how the wind can blow the disease many miles, so it is impossible to control it. It is showing up in much of the country.

Downy mildew is different than powdery mildew, which is not as serious.