SLF spread primarily through human activity. The full extent of economic damage this insect could cause is unknown at this time. New York's annual yield of apples and grapes has a combined value of more than $350 million, which could be greatly impacted by SLF. results in people getting honeydew on their hair, clothes, and other belongings when going outside.attracts swarms of insects that hinder outdoor activities and.promotes the growth of sooty molds that interfere with plant photosynthesis, negatively affecting the growth and fruit yield of plants.SLF also excrete large amounts of sticky "honeydew", which:.This feeding, sometimes by thousands of SLF, stressed plants, making them vulnerable to disease and attacks from other insects.Adults and nymphs use their sucking mouthparts to feed on the sap of more than 70 plant species.SLF pose a significant threat to New York's agricultural industry, negatively impacts outdoor recreation, and may impact forest health. SLF excrete liquid waste called honeydew that builds up under plants, sometimes encouraging the growth of black sooty mold.One-inch-long egg masses that are brownish-gray, waxy and mud-like when new.Sap oozing or weeping from tiny open wounds on tree trunks, which appears wet and may give off fermented odors. Photo: Pennsylvania Department of Agriculture, Including SLF fact sheet, SLF look-alikes poster, and important links.Visit Cornell's Integrated Pest Management site for an up-to-date map of current infestation locations in the Northeast, including New York (leaves DEC website). The first New York State infestation was discovered in Staten Island in August 2020 (leaves DEC website). In the US, SLF was first discovered in Pennsylvania in 2014 and was found in New York in 2020. While the full impacts of SLF are unknown, the insect will negatively impact the agricultural and tourism industries and may impact New York's forests. Spotted lanternfly (Lycorma delicatula) or SLF, is an invasive insect pest from Asia that primarily feeds on trees of heaven (Alianthus altissima) but can also feed on a wide variety of plants such as grapevine, hops, maple, walnut, and fruit trees. Spotted lanternfly, Photo: Lawrence Barringer,
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