yes, bifenthrin is one the best insecticides you can use for the brown relcuse spiders, i would suggest to use away from any animals or pets you may have
Bifenthrin is a common component in professional spray insecticides used to rid yourself of brown recluses. The spray can be applied in any areas where you suspect that you may have a brown recluse infestation. Common areas to spray are along floors, foundations, and around ceilings. It can also be used outside to help reduce the likelihood of entry.
Bifenthrin is currently used as treatment for crazy rasberry ants in the Houston, Texas area. It is also highly toxic to fish, crustacians and other aquatic vertibrates. It may also be used to treat areas for different types of spiders, including the Brown Recluse.
Yes it is a good insecticide to get rid of brown recluse spider's because it affects there nervous system, therefore i believe that after you use it, that they won't be able to live much longer afterwards. It also work's on other pests, like ant's and so on.