Yes, you can use Evergreen Pyrethrum Dust 1% as it is labeled for wasps. You can puff the application into the nest using something like a B&G Bulb Duster 1150. The product is safe as long as it's used per the label. You do need to dust into the nest rather than just around the entrance of it.
The inert ingredient part of any product (including Evergreen Pyrethrum Dust) is a trade secret and the manufacturer is not required to disclose this to anybody.
Evergreen Pyrethrum Dust 1% is safe to use when applied to cracks and crevices around the kitchen. We have a video here that explains how to use dusts.
No, Evergreen Pyrethrum Dust 1% cannot be added to your laundry. We do not carry any products that can be used in laundry.
The Evergreen Pyrethrum Dust 1% should be used within 3 years of the date of purchase and stored out of extreme temperatures.
Evergreen Pyrethrum Dust 1% and any other product that we carry are not labeled for use on people for head lice. If head lice has been found on a person in the home or in the bed/environment, a physician and medicine/shampoos provided by them would need to be used to get rid of the lice. Vacuuming and washing sheets/clothing is needed for the home to remove any that may have come off of the infested person. Please take a moment to review our How to Get Rid of Head Lice Guide for more information.
Evergreen Pyrethrum Dust is not for use for termite control or for use on edible gardens. Since termites will only feed on raw cellulosic materials, it is much more likely that something else is causing the decay of your tomato plants. If live termites are observed around edible plants, most customers will simply use some very hot or boiling water to kill the ones they see. You can also view our Termite Prevention Guide for information about how to protect your home from subterranean termites.
While the product label for Evergreen Pyrethrum Dust 1% does not specifically list brown recluse spiders, this product is a non-selective insecticide and will kill and insects and similar pests that come into contact with enough of the active ingredient. Just keep in mind that dusts are not a knockdown kill. Our Spider Control Kit would be a great choice for additional products to control brown recluse and other spiders, as well as the insects that spiders will hunt. This kit includes Temprid SC, a residual insecticide concentrate; CB-80, an aerosol that kills pests on contact; and glue boards to help catch and monitor crawling pests. Please see our Spider Treatment Guide for more tips and information.
Evergreen Pyrethrum Dust 1% is labeled to kill ants so it would be a great idea to dust it inside the wall voids but it will only work if the ants come in contact with the product, so make sure that they are going into or coming out from the wall voids. You could also spray around the perimeter of your home to have them pick up the product from where ever they're coming in from.
We'd highly recommend checking out our Ant Control Page to learn how to do your own Inspection and how to treat for ants.