I haven't used a Pyrethrin based yard spray but have used the Flying Insect Control with Pyrethrin in it. It comes from chrysanthemums. It is the only spray that will knock a mosquito down on the first spray. We have a camp on the Gulf Coast of Louisiana. Sometimes when the wind comes in from the north, the mosquitos are terrible. You literally can't breathe without inhaling some. The first night we were there, I opened the door to go walk our two dogs and at least 200 came in. I threw the husband out with the dogs and had a very old can of the pyrethrin based spray. I was totally amazed that every time I sprayed, the floor was full of their little bodies. I swept up a small dustpan full. It was amazing. The next day, we drove 200 miles home to get supplies to go back and build a screen porch so that would never happen again.
Another testimonial for Permethrin, the artificial version which is just as good. We have super large wood roaches in our neck of the woods. They are 1 to 1 1/2" long and they fly when sprayed with Roach and Ant Spray. The roaches come inside when it is too cold or too wet. The bug guy sprayed all my flower beds and all the way around my house in September 2017 with a Pyrethrin based spray. I saw the first big roach inside my house two days ago. Yes, I am on my way to buy some of a Pyrethrin based product or order off Amazon and will spray liberally within the next few days.