The Spotted Lanternfly (Lycorma delicatula), originally from Asia, is an invasive insect first detected in Pennsylvania in 2014. This planthopper is visually striking in its adult stage, but it poses an economic threat to agricultural and ornamental plants in the US. The insect is known for its ability to “hitchhike,” meaning it can be accidentally transported long distances on vehicles, outdoor equipment, and goods. This rapid, unintentional spread makes managing the population challenging for states dealing with infestations.
Do Spotted Lanternflies Bite Humans
The simple and definitive answer is that spotted lanternflies do not bite or sting humans or pets. They do not possess the mouthparts necessary to penetrate the skin. Their feeding apparatus is designed exclusively for consuming plant matter, meaning they pose no direct physical threat to human health.
These insects have piercing-sucking mouthparts, which function like a fine, tiny straw. This structure allows them to bore into plant tissue to access and drink the sugary sap flowing within. Since they are focused only on feeding from plants, they are not capable of biting humans.
Why Spotted Lanternflies Are Considered Pests
Spotted lanternflies are considered a serious pest because of their feeding behavior and the resulting secondary damage to plants. Both the nymphs and the adults use their piercing mouthparts to extract large amounts of sap from over 70 different host plants, including valuable crops. This feeding activity stresses the plants, leading to wilting, leaf curling, reduced growth, and even death in vulnerable species.
The greatest economic impact is seen in commercial crops, particularly grapevines, where high populations cause vine weakening, reduced winter hardiness, and crop loss. While feeding, the insects excrete a sticky, sugary waste product called “honeydew.” This honeydew coats leaves, branches, and anything beneath the feeding insects, supporting the growth of a black fungus known as sooty mold. Sooty mold is not harmful to people, but it interferes with a plant’s ability to perform photosynthesis, reducing its overall health and potentially contaminating fruit, making it unmarketable.
Identifying and Reporting Spotted Lanternflies
The adult spotted lanternfly is about one inch long and a half-inch wide when at rest. When its wings are folded, the insect appears grayish-brown with distinct black spots. When it jumps or flies, it reveals striking red hind wings with black spots and a white band, which aids in identification.
Citizens play a significant role in managing this invasive species. The first action upon finding one is to kill it immediately by squashing or crushing it. After eliminating the insect, report the sighting to the state department of agriculture or a local extension office, especially if it is found outside of a known quarantine zone. Most states require a photograph, often with GPS data, to confirm the sighting, as this information tracks the pest’s spread and focuses control efforts.