Beyond mosquitoes, Dulles and the surrounding Loudoun County region face growing issues from invasive insects, most notably the Spotted Lanternfly and Box Tree Moth. Both species affect homeowners, landscapers, and agriculture, thriving in warm, humid conditions and spreading rapidly across the Mid-Atlantic.
Overview
First detected in Virginia in 2018.
Highly invasive, feeding on more than 70 plant species — especially grapes, maples, black walnut, and the tree of heaven.
Found increasingly in neighborhoods across Loudoun, Fairfax, and Prince William Counties.
Behavior and Impact
Adults are active from July through November.
They suck sap from trees, leaving behind sticky honeydew that promotes mold growth.
Not harmful to humans or pets, but destructive to landscapes and crops.
Weather Influence
Mild winters increase survival rates of egg masses.
Warm, wet springs accelerate nymph development.
Dry summers slow them slightly but do not stop population spread.
Overview
Recently confirmed in Virginia — now seen in Northern Virginia landscapes and garden centers.
Primarily damages boxwood shrubs (commonly used in residential landscaping).
Larvae feed heavily on leaves, causing browning, thinning, and eventual plant death if untreated.
Behavior and Impact
Eggs are laid on the underside of boxwood leaves.
Caterpillars hatch within weeks and begin feeding rapidly.
One year can include multiple generations in warm climates like Virginia.
Weather Influence
Warm, humid summers create perfect conditions for fast breeding.
Mild winters allow partial survival of larvae and eggs.
Heavy rain does little to slow their development.
