Largo packed and shipped citrus for decades before houses replaced the groves, and it now sits in the middle of Florida's most densely populated county. Homes stand close together, so pests cross fence lines easily.
Largo is the third largest city in Pinellas County. The 2020 census counted 82,485 residents, more than a quarter of them 65 or older. It was incorporated in 1905 beside Lake Largo, which was drained in 1916; the old lake bed is now Largo Central Park Nature Preserve. For decades the economy ran on citrus groves, cattle ranches and packing plants, and the town was remembered as Citrus City long after postwar growth turned it into a bedroom community.
Today Largo touches the Intracoastal Waterway on the southwest and Tampa Bay on the northeast and rises from sea level to about 69 feet. Allen's Creek and McKay Creek drain it, and the McKay Creek basin is prone to flooding. The Pinellas County office of UF/IFAS Extension, the source for much of the pest science below, sits in Largo at Pinewood Cultural Park.