Termidor SC is a non-repellent insecticide. This means that ants and other insects cannot tell that it is there and they will readily walk over treated areas. Termidor SC also has a delayed reaction time and a transfer effect which allows the ants time to get back to the colony and spread it around before they succumb to the effects of the product. Talstar P on the other hand is synthetic pyrethroid which many sensitive insects such as ants can detect. Ants may avoid the areas treated with Talstar and those ants that do cross over treated areas are the only ones that will be killed by the product. Talstar P does not have a transfer effect so it will not be transferred back to the colony. While the Termidor SC will not actually be deactivated by Talstar P, it will be much less effective if it is over-sprayed with Talstar P.
You can spray the Talstar P higher up around window frames, window sills, door frames, any cracks and crevices around foundation or where caulking around windows and doors has opened up, around vents leading inside, and around lights (these bugs are attracted to the light from windows, doors, etc).
Our most popular general use product is called Talstar. It is widely used by pest control companies because it is labeled for almost every insect you could have a problem with and you can use it outside the home as well as inside, it is odorless and very safe for use around children and pets. It is a liquid concentrate that you mix with water in a one gallon hand pump sprayer. It will last for 60 to 90 days outside in between treatments. It is also labeled for lawn and ornamental use, and can be used on trees, plants, bushes and shrubs for all sorts of ornamental pests including Japanese beetles, mosquitoes, and other leaf eating pests. Talstar is also available in a granule formula called Talstar PL if you prefer to use granules.
We have a great article for doing your own pest control too: Do It Yourself Quarterly Pest Control
The most popular product for sod webworms is Talstar. Talstar is very effective on most insects including chinch bugs and it is gentle to plants. Time applications to control young larvae, if possible. Spot treatments may be applied when infestations are first detected and the damaged area is small. The treatment will be most effective if applied in the early evening when larvae begin feeding. Please check with your local cooperative extension office to see if a second generation is possible in one season in your region.