The Spotted Lantern Fly

SLF eggs are gray and found in masses on tree trunks or other vertical surfaces from late September to early May and can hatch in late April – early May. All vegetation, structures and vehicles including RV’s and trailers should be inspected for eggs or signs of the SLF, as movement of vehicles with egg masses contributes to the spread of the insect. The first three instar nymph stages (juvenile, immature stage) are about the size of a small tick. They are black and covered with white spots including the legs. The fourth (final) instar SLF nymph is red and black with white spots. The adult, which can be spotted beginning in July, has tan wings with black spots and a brick-and-mortar pattern along the wing tips. The inner wings have a red strip close to the thorax (body). If a resident spots any stage of the SLF, they are asked to report the siting to the Maryland State Department of Agriculture. The online reporting form is at mda.maryland.gov/spotted lanternfly.

The nymphs of the SLF climb to the top of the trees to feed on the sugary plant sap with its piercing needle-like mouthpart by probing the leaves, stems, and twigs. SLF will also feed on many other species of hardwood trees, including maples, walnut, apple, stone fruit trees, and grapes. A SLF infestation can result in economic losses to the agricultural and timber industries. The excretion from SLF feeding is called honeydew, which can attract other insects that can cause further damage to the tree. The sugary honeydew leads to the growth of sooty mold, which further impacts the heath of the tree by interfering with photosynthesis. Sooty mold will also grow on other items that are beneath the tree, such as deck furniture or vehicles.

If SLF is observed, residents should attempt to eliminate the insect from their property. When a few insects are found, residents are encouraged to control the spread by squishing them. Eggs can be scraped off and put into a container of rubbing alcohol before disposal. Tree sticky bands can be an effective monitoring tool and control method. The sticky bands can be placed around the tree trunk to trap nymphs as they migrate up and down the tree trunks during daily feeding. Removal of Tree of Heaven trees can help to reduce SLF populations. Insecticidal applications of EPA registered systemic pesticides can be used to control large infestations of SLF. Always read pesticide labels carefully and follow all instructions, including use of safety equipment, mixing rates, use, and safe disposal.

Residents are encouraged to learn more about this invasive insect and be on the look-out for it in our area.