Termidor SC is our most popular termiticide for treating and prevention of subterranean termites. Please take a few moments to review our treatment article on How to Get Rid of Subterranean Termites for more information on a successful application.
You can use Termidor SC for the listed pests twice a year at a rate of 0.8 oz (0.06% finished solution) per gallon of water or up to 4 times a year at a rate of 0.4 oz (0.03% finished solution) per gallon of water, sprayed 1 to 2 feet up the foundation and out on the ground.
Termidor SC is labeled to control pill bugs (a.k.a. woodlice). It can only be used outside around the perimeter of the home. Termidor SC can be sprayed twice a year at a rate of 0.8 oz (0.06% finished solution) per gallon of water or up to 4 times a year at a rate of 0.4 oz (0.03% finished solution) per gallon of water, sprayed 1 foot up the foundation and out on the ground.
Termidor SC starts to work within a few days of termites contacting a treated area but if you suspect an active infestation you will need to search and locate exactly where in the home they are infesting and spot treat the gallery directly. Otherwise there is no real way to know if the Termidor in a trench is working. Trenching is only part of protection and treatment for subterranean termites but if you are dealing with drywood, it would not have any effect on the termites since they would never have gone through the treated soil.
Rodding under the slab of a house from the exterior is a complex and detailed process that we do not recommend attempting yourself. We recommend that you contact a local reputable termite company for an inspection and estimate for something like this. If you have termites in the home, then you can spot treat where there are active termites using a ready-to-use termiticide foam such as Termidor Foam which will transfer throughout the rest of that termite colony.