Lanternflies do not bite or directly harm humans. They are not equipped with mouthparts to bite people and do not sting or spread diseases to humans or pets. However, some people may have allergic reactions to the honeydew or mold caused by lanternflies, which can lead to respiratory irritation or skin sensitivity. The sticky honeydew they produce can also coat surfaces like outdoor furniture and vehicles, creating a nuisance and promoting the growth of sooty mold. Additionally, large swarms of lanternflies can be psychologically stressful and disruptive to outdoor activities. The main harm caused by lanternflies is to plants and agriculture. They feed on the sap of many plant species, weakening them, reducing growth and productivity, and sometimes causing plant death. Their honeydew fosters the growth of mold that further damages plants. This results in significant agricultural and environmental damage but does not directly harm humans. In summary, lanternflies pose no direct physical threat to humans but can indirectly affect them through allergic reactions and by causing environmental and property nuisances.