Be on the lookout for the spotted lanternfly (SLF)! Infestations of this invasive insect have been found in New York City, southern New York, western New York, and the Finger Lakes. SLF threaten crops and fruit production by feeding on a plant’s sap. The sticky honeydew that they excrete while feeding can also coat leaves and attract sooty molds. Apples, grapes, hops, walnuts, and other crops are at greatest risk of being negatively impacted.
Signs of an SLF infestation include sap oozing from tiny open wounds on tree trunks or plant stems and honeydew build-up under plants, but since other insects leave behind similar signs, it is best to look for SLF egg masses or the more recognizable adults.
SLF can lay their eggs on almost any flat surface, including cars, firewood, outdoor furniture, and camping equipment. Egg masses are 1-inch long and brownish-gray, waxy, and mud-like when new. Old egg masses are brown and scaly. Adults are brownish-gray with black spots and have bright red on their hindwings.
If you think you’ve found spotted lanternfly:
- OR fill out the Department of Agriculture and Markets' reporting form.
- Note the location (address, intersecting roads, landmarks or GPS coordinates).
- After you have reported SLF in your area and collected a sample, you should kill any additional SLF you see by stepping on it or crushing it.
Please note that because SLF is well documented in New York City, it is no longer necessary to report finding or collect samples at this time.