Box tree moths have been confirmed to be near the Canadian border, which are a destructive invasive species.
The moths are a threat to ornamental boxwood plants.
The moth comes from East Asia, and five adult moths were discovered in Niagara County. It is suspected that the moths flew in from Canada and several larvae have been collected in Youngstown.
Residents are asked to keep an eye out for larvae, which are green and yellow with white, yellow and black stripes with black spots.
Signs of trees being infected are skeletonized leaves and dryness.
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