HARRISBURG – As Spotted Lanternflies hatch across much of the state, PA Department of Agriculture crews have begun to spray an insecticide that kills the insects on contact along railways, interstates and other transportation rights-of-way. Contact spraying is a new element of strategic efforts to slow the spread of the invasive pest, which moves primarily by hitching a ride on vehicles traveling out of infested areas. The insecticide has been thoroughly researched and found to be safe for use in the areas being treated. However, Pennsylvanians on the hyper-sensitivity registry will be notified prior to spraying in their areas. Spraying reaches peak effectiveness when between 75 and 100% of insects are hatched. Spraying has begun in southeast and southcentral PA, where the insect’s hatch is farther along and will be scheduled elsewhere as hatching progresses in areas of the state with known insect populations. The invasive pest will be active and will reproduce and spread until fall frosts.