Solutions Do It Yourself Pest Control

I found a Termite tube on my garage slab, up to the underside of the stucco ( live in AZ ). The tube was not there more than 2 days. I broke the tube open an saw no termites, then soaked the ground with Ortho Home Defense max. My question is - if any termites made it inside the wall, will they live without coming out for water ? Should I foam the wall cavity just in case ? Thanks, will be ordering Termidor and doing a whole house treatment soon.