In the mid-19th century, the first artificial lure used for bass was developed in the form of an artificial fly. At first, these artificial fly patterns were largely derivations of existing trout and salmon flies. As time went on, new fly patterns were specifically developed to fish for bass, as well as heavier spinner/fly lures that could be cast by the baitcasting and fixed-spool casting reels and rods available at the time. Floating wooden lures (plugs) or poppers of lightweight cork or balsa were introduced around 1900, sometimes combined with hooks dressed with artificial fur or feathers. Production of the plastic worm began in 1949, but it was not until the 1960s that its use became popular. The plastic worm revolutionized the sport of bass fishing.