Above: A harmless hover fly feeding on sweaty skin. These flies appear in mid- to late-summer. The 1860s song of this title has retained some popularity through the years. Who has not been annoyed by ...

You’ve seen the images. Pest-control operators in full-body suits, tanks of toxins on their backs and spray guns at the ready. These guys are dressed to kill. But that’s history. “I think the industry ...