I don't know what was being sprayed, but it didn't kill anything! We've used different pest services off and on for 6 years, mostly for scorpions. Typically during the summer I would black light outside at night and kill 1 maybe 2 and find 1 in the house a year. Bulwark sprayed for a year and we've had scorpions EVERYWHERE. I've had more in the house in 1 month than I've had in 6 years. Bulwark came out to spray inside and outside but after a scorpion crawled down my wife's shirt and stung her in the chest, and a 2 inch sewer roach walked across the stove, ENOUGH WAS ENOUGH!