According to the product's description this is made from (and I'm quoting) "made up of 100% pure Thyme botanical extracts"
All mints (including Thyme) contain compounds which are effective fungicides. Used in conjunction with rosemary extracts you have a double-whammy with having both a viable pesticide and fungicide.
You can also make your own for chump-change using a process called Fermented Plant Extracts. Grade-school science processes.
Thyme extracts (and other mints) are extremely easy to make - add about 1 lb. to 4 gallons of water. Let it sit for a couple of weeks until the smell almost knocks you over. Remove the plant material and your mix is now ready to dilute and apply.
Add 1/4 cup to 1 gallon of pure, clean water and spray the top and bottom of every leaf, branch and trunk. Hit the top of the soil as well. Adding 1/2 tsp. of Dyna-Grow
Pro-TeKt (liquid silica) is an important component.
Repeat every 4 days until you've applied 5 or 6 times.
That's one approach which will work for you and save you some serious money. There are other methods to extract these plant compounds but this one will get you up and running.
Lavender flowers provide both fungicide as well as pesticide benefits. Plus it smells a lot nicer, IMHO.
YMMV
HTH
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