Any Essential Oil that would be beneficial to mycorrhizal

I see the greek paper using spearmint.... but was more looking for what oil might mycorrhizal be attracted to.  

I see many oils are anti-fungal.. i assume some dark noted- low noted oil might be an attractive to mycorrhizal and other fungi. Thought was to introduce to my biochar... and soils.

Coffee Oil

Or coffee grounds, which contain the oil already...