Agriculture Secretary George Greig is calling Pennsylvania's decade-long effort to eradicate the plum pox virus a success.
Greig said Monday that three years of monitoring has shown the disease that affects pitted fruits has not reappeared since October 2009, when Pennsylvania was declared free of plum pox, so the virus is considered officially eradicated.
Plum pox severely affects production of fruit-bearing and ornamental varieties of almond, apricot, cherry, nectarine, peach and plum stone fruit trees.
The state imposed a 300 square-mile quarantine area after plum pox was found in Adams County peach trees in 1999.
Since trees cannot be cured, affected growers were required to destroy all exposed stone fruit trees within the quarantined area, which included parts of Adams, Cumberland, York and Lancaster counties.