Carolyn, Thi statement below from the Cornell report suggests to me that it does more than just control damping off. We shall see. Ami
Pathogens controlled
So far as the author is aware, different strains of Trichoderma control every pathogenic fungus for which control has been sought. However, most Trichoderma strains are more efficient for control of some pathogens than others, and may be largely ineffective against some fungi. The recent discovery in several labs that some strains induce plants to "turn on" their native defense mechanisms offers the likelihood that these strains also will control pathogens other than fungi.
The link below shows a study of T22 on tomato seedling growth as a added benefit. Ami
http://www.actahort.org/members/show...knrarnr=635_16