Penn State research

Pennsylvania study shows cost of spotted lanternfly if it spreads across state

The spotted lanternfly is already costing the state of Pennsylvania $50 million each year in damages, according to a first-of-its-kind study. However, the researchers warn the cost could balloon further if the pest is not contained.

Scientists at Penn State say if the spotted lanternfly is able to escape the quarantine zone in southeast and central Pennsylvania and spread across the state, the annual economic damage could reach $324 million with a loss of 2,800 jobs. Under the worst-case scenario, the study found, losses could increase to $554 million, with a decline of nearly 5,000 jobs.

The lanternfly is native to Asia. It was first discovered in Berks County in 2014 and has since spread to 14 counties.  It’s been found in Bucks, Carbon, Chester, Dauphin, Delaware, Lancaster, Lebanon, Lehigh, Monroe, Montgomery, Northampton, Philadelphia and Schuylkill counties.

Jayson Harper, director of the university’s Fruit Research and Extension Center in Biglerville, Adams County, said the fly poses a threat to grapes, tree fruits and hardwoods. “It’s important for the legislature to understand the magnitude, the value of the crops that are under risk so we can have a vigorous response to managing the pest.”

Whyy.org reported how researchers estimate implementing best management practices in the quarantine zone would cost around $28 million.


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