Yes, Termidor SC will work for Formosan termites. Formosan termites are a species of subterranean termites and Termidor SC is labeled for subterranean termites.
The only temperature that effects Termidor SC is when it is below freezing. Termidor SC should not be applied if the ground is below freezing, or it will not take hold
When treating a block foundation with Termidor SC, you should drill a hole in each void so there would be 2 holes per block. The holes should be no more than 18 inches high. Usually, you want to drill on the second row of blocks high from the ground. In addition to drilling the holes, you should also trench and treat the outside foundation wall and the inside foundation wall if you have a crawl space. After drilling the holes, you are supposed to apply 2 gallons of solution per 10 lineal feet into the blocks. For filling trenches and drill holes going vertically into slabs, you should apply 4 gallons per 10 lineal feet. Please let us know if you have any further questions. Click on the link below for more information on treating termites.
If you are doing a trench application for termites and there is concrete surrounding the foundation, then holes will need to be drilled all around the home to properly apply the Termidor SC. The holes need to be drilled every 10-12 inches apart, 18 inches in depth to reach the soil beneath the concrete and anywhere from 3/8 inch – ½ inch in diameter. Please refer to our Termite Treatment Guide for a more in depth step by step on how to treat your home for subterranean termites.
You should wear chemical resistant gloves, long sleeve shirt, long pants and close toed shoes when applying Termidor. If you are applying the product in a non-ventilated area, a respirator is will be needed. Termidor is a safe product for most folks to use. We do encourage our customers to read the product label and the MSDS before they purchase a product to be sure they will be comfortable using it.