Here's an other article re: late blight, with several paragraphs that I deemed pertinent. You can click the link to read the whole article:
http://news.psu.edu/story/173084/2009/10/21/prevent-tomato-late-blight-next-growing-season
To help prevent late blight next growing season, Gugino recommends making sure that all late blight-infected tomato and/or potato plant tissue from this past season is dead and home gardeners refrain from composting diseased plant material. "Late blight cannot withstand the freezing winter temperatures of the northeast, but may be able to live in the center of a warm compost pile. As long as the plant tissue is alive, the pathogen can survive."
There is no need to remove the dead tomato plant tissue this late in the season or treat the soil over the winter, since the freezing temperatures will kill both the plant tissue and late blight. However, late blight can survive in infected potato tubers overwinter and can be a potential source of the disease the following year. If they are infected, Gugino recommends they be dug up and disposed of in the regular trash. "If volunteer potato plants grow next season make sure to quickly destroy them."
Fortunately, the late blight pathogen can't survive in or on tomato seeds, or on tomato cages and stakes between the seasons and therefore cannot be a source of the disease next season. However, Gugino said many bacterial diseases can survive in the seeds and on the cages so it is still important to purchase high quality seed and to disinfect cages and stakes to help control these diseases.
Currently there are no tomato varieties resistant to late blight, however growers and home gardeners have observed that some may be less susceptible than others.
"Fortunately, there are some potato varieties including Elba, Kennebec, Allegany, Sebago, Rosa, Defender, Jacqueline Lee and Ozette, that are described as having some late blight resistance," Gugino said.
____________________________________________________________________
As for FF, there is a FAQ article written by Tiki Jane about the how and why of FF in my signature. You will have to paste the link into a search bar to access it.