It seems there are several scientific studies of the use of those plant oils. My dinosaur of computer does not let me go to Facebook, so I couldn't open this abstract up. Maybe you can.
http://www.academia.edu/9242326/Inte...ease_of_tomato
Might be something to look into. Making your own organic essential oils is easy. Wonder if planting Thyme and Peppermint plants around our tomatoes would work.
What do you think about the use of the non-mycorrhizal fungus Geosiphon pyriforme? Are you familiar with this fungi? The only thing I know about G. pyriforme is it is similar to Glomus.