The Gypsy Moth
In 1869, the gypsy moth was introduced to Medford, MA to produce silk for the local industry. Some moths however, escaped and starting killing trees. Since that time they have spread west and south and are responsible for billions in environmental damage.
In 1972, scientists discovered an unusual weapon against the moths. I call it Greek-icide. Rather than employing toxic pesticides to kill the caterpillars and adults, they used sex. This may seem a bit unusual, however, considering what happened to both Rome and Greece when sexuality ran rampant in the streets, it makes sense.