Jim. I assume you mean this article:
http://garden.org/nga/searchqa...
I would imagine there is no solution offered because it is not necessary to treat with a fungicide, at least according to this Mississippi State University Extension article on birch leaf blight. The article below does make some suggestions for management however:
http://extension.msstate.edu/n...
I don't know when they lose their leaves in your area but it will vary depending on geographical location. Maybe someone in the area can answer.
