Wilson One Shot Spiderban Aerosol has not been registered for control of
Black Widow Spiders, therefore it would not be guaranteed. That being said,
there is data out there that indicates the active ingredient Permethrin
should have some effect, possibly controlling Black Widow Spiders. Both,
direct contact, and sufficient spray would need to be applied directly to
the Black Widow Spider for the product to have any effect.
answered 6 months ago