Termites do not normally attack live, healthy trees so you most likely will not find any products that will work as a ground barrier around the trees. Most people are primarily concerned with protecting the big investment, their home, and Termidor SCwould be the product to use for that. It is only labeled to be used adjacent to the structure though. Please take a moment to read over our article on "How to do a Termite Treatment" for complete details.
Termidor SC cannot be applied indoors or for flea control. We do carry an Indoor Flea Kit that will be great for this application. You will vacuum daily (discarding the bag or emptying the canister after each use) and spray once every two weeks. It is highly recommended to make a minimum of two applications indoors but may require additional applications depending on the level of fleas.