Does the crotalaria control dengue?
Have you ever heard of using Crotalarias to control dengue mosquitoes? Yeah. Know that this could just be a waste of public money.
Instead, governments should focus their spending on proven actions, such as education and awareness, cleaning and disposal of debris, among others.
As I know many will be seething in the comments, here are just a few publications that discuss this:
WUTKE, Elaine Bahia, et al. "Aedes aegypti: control by crotalarias has no scientific proof." Campinas: Instituto Agronômico 16 (2015).
Brito, Joás, et al. "After 10 years, the myth of Crotalaria spp. and dragonflies remains alive." Biota Neotropica 20 (2020): e20190907.
TO, IN COMBAT. "THE POSSIBLE EFFICACY OF Crotalaria IN COMBAT." Acta Biologica Brasiliensia 1.1.