The lanternfly, known scientifically as Lycorma delicatula, is an insect that you need to eliminate right away if you see it. It came from China and was first discovered in the United States in Pennsylvania back in 2014. Since then, it has spread and caused a lot of harm to farms and the environment. Lanternflies suck the sap from various plants and trees, which makes them weak and leads to a sticky substance called honeydew that they produce. This honeydew creates sooty mold, which can further damage the plants by blocking their ability to photosynthesize.