The bad news is that soil contamination has the longest, most persistent potential for harboring a pathogen. The good news is beneficial bacteria and fungus compete for food and space. These good guys form protective nets/webs around roots and leaf surfaces all the while producing vitamins and antibodies that lay to waste the microbes living off of a healthy plant. This prevents most pathogenic bacteria and fungus from invading a plant, be it roots stems or leaves. Soils with a high diversity of bacteria and fungal types are more likely to have a larger number of non-pathogenic microbes. These beneficial microbes will out-compete their pathogenic cousins.  Using the soils own food web’s natural defenses is by far the better way to keep the bad guys at bay. You might want to check out the report I put together Bacterial Biofilms. It’s amazing the energy, both chemical and ethereal, that is directed at the bacterial level pushing to form communal colonies of biofilms. Personally, I like clean sheets at home but these little guys think their slimy adobes are to-die-for.

Get to Know this list of Pathogens Below