Yes, Termidor SC will work for Formosan termites. Formosan termites are a species of subterranean termites and Termidor SC is labeled for subterranean termites.
Termidor SC will treat spiders but you would only be able to use the product outside. Termidor SC does not have an immediate knockdown but instead uses a delayed reaction kill which makes it especially effective for social insects like ants, termites and certain species of wasps. Most folks will use a residual product with a broader application area. Please check out our spider control kit for a better option.
You can do that if you choose, but it is not as effective as drilling the slab inside the garage. This is because the garage is a separately poured slab, meaning the termites could come from deep underground and come up to the surface under the garage slab, and enter the wall where your door is going into the house untouched. You don't have to drill every wall in the garage, just the walls that are not exterior walls, where you have living space on the other side of the garage wall and apply Termidor. So it is a personal choice, but drilling the garage walls is the best way to protect all entry points.
For prevention and/or control of existing or future infestations of termites or carpenter ants in decking and fencing materials, landscape timbers and similar nonstructural wood-to-soil contacts, trees, and utility poles, apply 0.06% Termidor SC finished dilution (or foam) by the following methods.
If possible, locate and treat the interior infested cavity by injection. Nonstructural wood-to-soil contacts may be treated as a spot application or continuous treated zone.
Apply Termidor SC to the soil as a drench or by rodding around the base of the points of soil contact. Rod holes must be placed 3-inches away from soil contact points and spaced no more than 12-inches apart along the perimeter of soil contact points.
It sounds like you have a detached garage if you can trench around 3 sides applying Termidor SC. If this is the case, you do not need to do any drilling inside the garage because the slab should be one solid pour, which means the only way termites could enter is from the outside perimeter. Also, you do not need to drill across the driveway where the door is either because there is nothing there to protect. There is no wood, just space where the door is. The only time you would drill across the front is if you had two single garage doors side by side with a center support. In that situation you would want to drill just a few holes on the inside near the support, and then outside near the support from the driveway to protect that area.
If your garage is attached to the house, then you would trench around the outside walls just like in the example above, except that you would only be trenching around 2 sides. The third side would be against the heated space of the house, where the door is to the house. You would need to drill this wall inside the garage because you would not be able to trench the other side of it.
We are always here to answer any questions you may have. Please feel free to call us at 866-581-7378 with any questions.
