



On
29 September 2014, the
Pennsylvania Department of Agriculture (PDA) and the
Pennsylvania Game Commission first confirmed the presence of the spotted lanternfly in
Berks County, Pennsylvania, northwest of
Philadelphia.
[28][46] Based on its host affinities,
it presented a threat to the state's grape, fruit tree, and logging industries. The greatest risk of spread was seen in transportation of materials containing egg masses laid on smooth bark, stone, and other vertical surfaces.
[16]
The Pennsylvania Department of Agriculture
banned the transport of items that could harbor the egg masses, including firewood, lawn mowers, outdoor chairs, trucks, and
recreational vehicles from seven municipalities on 1 November 2014.
[16] Given the presence of old egg masses found, it has been estimated that the spotted lanternfly may have been in the United States since at least 2012,
having survived the unusually cold 2013–14 winter.[37] Since then, over 34 counties in Pennsylvania have declared quarantine.
[47][48]
Pennsylvania State University ha
s estimated statewide costs of the spotted lanternfly to be $99.1 million in agricultural losses, and $236.3 million to the forestry industry, annually. Models of the spotted lanternfly's spread have projected
an annual loss of $554.0 million, with an additional loss of 4,987 jobs, should it continue to spread to the entirety of Pennsylvania.
[49] A national working group led by the
U.S. Department of Agriculture, consisting of
Penn State Researchers and
USDA scientists, was organized "to determine what is known about the lanternfly and what research is needed, including DNA analysis to pinpoint where the infestation originated."
[20]
Other states began seeing spotted lanternflies as soon as 2018, and by 2021, they were also confirmed to be established in at least parts of Connecticut,[50] Maryland,[50] Massachusetts,[51] Delaware,[52] New Jersey,[53] New York,[54] Ohio,[55] Indiana,[56] Virginia,[57] and West Virginia,[50] with several of these states issuing quarantine orders.[50] In 2022, the species was confirmed to be present in
North Carolina.
[58] A large potential range exists for the spotted lanternfly to become established if not prevented, covering almost all of the eastern part of the country, as well as critical wine- and
hop-growing valleys of the Pacific coastal states.
[59]
Interceptions of dead spotted lanternfly specimens have been reported in
Michigan,
[60] Kansas,
[61][62] Oregon[63] and
California,
[64] although no live sightings have been reported from these states as of 2021. This increases concerns for possible accidental introduction of the insect to yet more states where they can potentially become established.
[65]
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