If you give presentations on the non-target effects of pyrethroid mosquito sprays, here are some modified lawn signs to download and use. I’ve based them on an actual sign from Mosquito Shield, below.
First, here’s a sign that simply has an additional part that shows the name and molecular structure one of the two chemicals used by Mosquito Shield (they also use cyfluthrin). It would be nice to have signs like this because it educates neighbors on what is actually in these types of sprays (the companies don’t like to disclose).
Here’s a mocked-up sign that informs neighbors that the homeowner has also eliminated his/her butterfly and moth problem.
Here’s a Firefly Shield sign. It’s really the only beetle people care about and, unfortunately, the numbers of fireflies is plummeting. There are thousands of other beetle species in a typical backyard and none deserves to be dosed with a neurotoxin.
Spiders are also killed by Mosquito Shield sprays. I suspect many people would see this is a plus but spiders are likely important predators of mosquitoes … and spiders are not hurting humans.
Many bird species depend on insects and spiders to feed themselves and their young, so when you hire Mosquito Shield to nuke your yard you are indirectly reducing the numbers of birds that can survive in an area. I think few homeowners realize this, and Mosquito Shield (and other companies) are unlikely to spell out that consequence.
Finally, pyrethroids get washed into nearby bodies of water and end up killing fish. This might be rare in towns where there is just one person who subscribes to Mosquito Shield … but if everyone in town decided to get sprayed the fish would really take a hit.
More details here.