I have been using Trichoderma, which I culture myself (means I know what's in it) *wink*
I will never say this for any other plants, but with my own experience Trichoderma is not a good option as foliar spray to cannabis. Root drench is okay, but not too much. Tricho has caused me rot, on the leaves in an indoor grow as well as outdoor grow. My observation is that, if the leaf is about to die- tricho will make it dinner.
But tricho won't harm mycorrhiza, as far as I know. Tricho is a very rapid growing organism, hence can eliminate the grow space and maybe food of the mycorrhiza. Trichoderma in cultures can easily overgrow any bacteria and that's what I have seen. So if you want to use tricho, be sure it is very much diluted.
If you are interested in shielding your plants from other pathogenic bacteria/fungus use Pseudomonas fluroscence as bio-control. I have been giving foliar and root drench of Pseudo during high moisture climate. You can check out my outdoor grow to see the effects. No deficiencies, no rot, no bacterial diseases. Spread the word, Pseudomonas is the best thing for cannabis.
Heck I even use Pseudomonas spray like a fungicide- my tools,trays,potting soil,seeds. I have also observed that Pseudo can increase the shelf life of vegetables and fruits. So if all goes well, I was hoping to use Pseudo when I get my lady to flower(hopefully) on the buds to shoo away mold.
I hope the information helped.
Cheers!
Toker.