HARRISBURG - The Pennsylvania Department of Agriculture (PDA) has reported a n infestation of Ligurian leafhopper (Eupteryx decemnotata) in a Pennsylvania greenhouse. The leafhopper has been reported in California and Florida in 2009, but this is its first appearance in Pennsylvania. Although the pest was eliminated in the greenhouse, PDA suspects that it is present but not yet identified in other greenhouses. The pest can live year-round in greenhouses.
The Ligurian leafhopper is a native to southern Europe and attacks members of the mint family (Lamiaceae) including rosemary, marjoram, oregano, thyme, and others.
The pest causes stippling on leaves leading to severe plant damage and death if uncontrolled.
The bug is 3 mm long with translucent gray wings with brown splotches. The head is yellow with 10 black spots. The sage leafhopper (Eupteryx melissae) is a similar pest on mint with fewer spots, but field identification and differentiation is difficult.