The spotted lanternfly (Lycorma delicatula) is an invasive planthopper native to parts of China and Vietnam. It was first detected in the United States in Berks County, Pennsylvania, in 2014. Since then, it has rapidly spread across numerous states, often hitchhiking on vehicles and goods. Many people are concerned about whether this insect poses any direct danger to human health.
Direct Threat to Human Health
Spotted lanternflies do not pose a direct threat to human health. They do not bite or sting people or pets. These insects possess piercing-sucking mouthparts, similar to a tiny straw, which they use to feed on plant sap. However, these mouthparts are not capable of penetrating human or animal skin.
There is no scientific evidence to suggest that spotted lanternflies transmit diseases to humans or animals. While some social media posts have suggested the insect might be toxic to pets, current research does not support these claims. More studies are underway to fully understand any potential indirect effects.
Indirect Impact on Daily Life
While not physically harmful, spotted lanternflies can significantly impact daily life due to their nuisance factors. As they feed, these insects excrete a sugary, sticky substance called “honeydew.” This honeydew can cover outdoor surfaces such as cars, patio furniture, decks, and play equipment.
The honeydew promotes the growth of black sooty mold, which is harmless to people but can make surfaces unsightly and reduce the aesthetic value of outdoor spaces. This mold can also inhibit photosynthesis on plants by blocking sunlight. The sticky residue and the presence of large numbers of lanternflies can make outdoor areas unpleasant, attracting other insects like ants and wasps.
Safe Interaction and Reporting
When encountering spotted lanternflies, there is no need to fear direct physical harm. However, it is important to take action to help manage their spread. If you see an adult spotted lanternfly, you should kill it immediately by stepping on it, crushing it, or using a fly swatter.
Reporting sightings to local agricultural departments or extension services is important for tracking the insect’s spread and informing management efforts. If possible, take a picture of the insect and note the location before destroying it, then submit this information to the relevant authorities. If you find egg masses, scrape them off surfaces and destroy them by placing them in a sealed bag with hand sanitizer or rubbing alcohol.