Most agree that from time to time, plant quarantines are needed to protect against invasive species, pests and pathogens. But what happens when a quarantine is no longer needed, or it no longer conform to the best available practices? According to Dan Hilburn, plant division administrator at the Oregon Department of Agriculture, the answer, all too often, is “nothing.” His recent post explores the factors that can conspire to keep obsolete rules in place long after they have outlived their utility.