Spotted Lantern Flies

Spotted Lantern Flies

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What are Spotted Lantern Flies

  • Spotted Lantern Flies are an invasive species that is native to China.
  • They were first spotted in the states in 2014 in Southeastern Pennsylvania.
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What trees do they prefer?

  • An invasive species named the Tree of Heaven functions as the most preferred host of the Spotted Lantern Fly (SLF).
  • While they can feed on 70+ kinds of trees and woody vines, they prefer to feed on ToH.
  • This species of tree is particularly fast-growing.
  • They can thrive very well in poor conditions like shallow soil, disturbed sites, even pollution.
  • SLF’s use their long needle-like mouths to suck sap from the phloem (inner bark

Why Should We Be Concerned about the Spotted Lantern Fly?

  • They are found in at least 17 eastern states and will continue to spread.
  • Adult females produce many more eggs when they feed on the sap from a TOH tree. This makes the presence of ToH trees more threatening as they share a symbiotic relationship with the invasive SLF.
  • SLF populations reach their highest densities in heavily wooded areas such as residential areas, urban areas, orchards, vineyards, and especially where ToH is present.
  • As SLF’s suck sap, they excrete honeydew. This honeydew coats vegetation, sidewalks, driveways, and any surrounding objects.
  • Ants and wasps are then attracted to the honeydew and these insects can become a nuisance as well.
  • Honeydew is capable of growing black sooty mold, which poses a health issue for people.

What Predator can do to help?

  • Some methods of dealing with high-density SLF populations are using insecticides, tree banding, setting traps below ToH trees, and scraping off egg masses (found on the bark of trees).
  • Egg masses are present from fall through winter to early spring.
  • These methods help to significantly reduce the SLF population.

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