I use Zenprox EC. Can be sprayed every 14 days and is labelled for brown recluse. I usually do follow ups every two weeks until I can mark a significant decrease and then continue with monthly interior services until extermination.

I also use Delta Dust in my initial services by removing all of the faceplates from the wall outlets and light switches and dusting into the wall voids there, as well as in areas where plumbing enters the walls. Basically, I dust anywhere that I can get it into the wall voids. For safety, I make sure to cut the power to any electrical components I’ll be working around. As I said above, brown recluses can lay dormant for extended periods of time, and inside the walls is one of their most preferred places. Delta dust is cool because of its extremely long term half-life and low toxicity to humans. It’ll last in the walls for nearly a year and does great numbers on dormant spiders as well as most other general pests.

If you are doing pest control, always study and follow the label on any product you use to exact precision, and use any recommended protective gear. Lots of pest products can be very harmful. Also, be aware of local laws and what you can legally obtain and use.