Hello! Today I was here for your spider service call. It is unusual to see a black widow out in an open location as they tend to be reclusive and like small enclosed spaces. If you see additional activity after approximately two weeks, please contact the office for a follow up. We may have to do an interior spot treatment.I treated the perimeter foundation of the home as well as up under the siding and around entry points, such as windows and doors with a liquid residual product for general pest control. As always, I made sure to avoid the Koi pond. I also treated behind the firewood on the back deck (avoiding getting product onto the wood itself), as well as under the deck as much as possible. If you have any questions, please do not hesitate to reach out to our office. Thank you for choosing Green pest solutions and have a wonderful day!