No, compared to innoculating your transplants, soaking the ground with with Trichoderma spores is a waste of time and effort. There's a certain psychological satisfaction to "disinfecting" the soil before you ever plant anything - but in this case, it's not rational. The literature consistently shows that introducing the spores to the root system just before transplant is the most effective (actually, I can't think of any good examples where soil soaking with a wilt control organisms had anything but marginal success).
Fusarium and Verticillium spores are incredibly persistent and hardy. They are rarely parasitized by other fungi under normal conditions.
Another possibility to look into is "anaerobic soil disinfestation". The active organisms in this process are most likely Clostridium species and other organic acid producers.
Last edited by greentiger87; July 11, 2013 at 09:16 AM.
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