Hi Kristen, glad you're here!....As far as getting rid of ants with natural/non-toxic means, I have some ideas that may help. For streams of ants of all sizes that have found their way into my house at times over the years, I learned how to get rid of them completely and quickly. You use plain borax (which is a safe natural pesticide, the salt of boric acid), sugar, and some recipes call for water. I use a few shallow lids near where the ants come in and it doesn't take long for the colony to be wiped out.
In case you'd rather have something to spray directly on the tree, I have another suggestion that has worked excellently for me against pests- just use a spray bottle of water with about a teaspoon (whatever the directions suggest for the amount of water in your spray bottle) of neem oil shaken in. I use Theraneem Naturals for the Garden, and get it here:
http://www.iherb.com/Organix-South-TheraNeem-Organix-Neem-Oil-for-the-Garden-16-fl-oz-480-ml/17693
This is a great price, 2 day free shipping, and the bottle lasts a long time. There's also a discount for new customers if you use PMH653 at checkout.
Neem oil also kills bacteria, mold, and germs, so your tree/s would be naturally and safely disinfected :)
I'm also in zone 7b, but a beginner at growing fig trees, so don't know much about ripening fruit. Another member did give me an excellent suggestion for using a shop lamp, the kind with a clamp, and daylight bulb for added light for my indoor baby fig trees.
Let me know if you have questions about any thing I've written....best wishes :)
p.s. I'm so glad you didn't use the toxic fruit spray!