It’s more likely I think that most successful reproduction for the past century has increasingly been done by bugs who avoid flying over roads. There could be many reasons why they do this. Perhaps some sense the vast asphalt plain and prefer to stay in greener areas. Temperatures above roads in full sun are much hotter than above grass. Turbulence encountered by cars may encourage some bugs to seek calmer airspaces.

It’s not so simple as “pesticides”.