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How to Control Spotted Lanternfly

Controlling Spotted Lanternfly (SLF) requires action by you and a professional tree service like Giroud.

What You Can Do:

Life cycle of Spotted Lanternfly from Egg Masses to Nymph to Adult

There are many “Do It Yourself” actions you can take to control SLF. 

  1. Walk Your Property: Year-round

Inspect your property regularly to search for signs of this pest.  First, you need to learn what Spotted Lanternfly looks like.  As the photo shows, this pest changes dramatically as it moves through its life cycle.   If you find them, below are the actions to take at each stage of its life cycle.

  1. Trap Nymphs from May-July:

  • Wrap high risk trees with sticky bands.Sticky bands on trees to trap spotted lanternfly nymphs. These bands are too wide. Bands should be cut in half to avoid accidentally trapping small animals and birds.
  • Avoid Accidentally Trapping Small Animals and Birds! Penn State recommends cutting sticky bands in half lengthwise.  For additional protection, wrap chicken wire over the sticky band.
  • Change bands every two weeks.
  • Where to Buy: Sticky bands can be found at most hardware stores and also on Amazon.com.

  1. Find and Destroy Egg Masses from September-May:  Stop future generations!  One female can lay up to 100 eggs on just about any smooth surface.  Scrape egg masses into a bag that contains rubbing alcohol or hand sanitizer.  Learn more about how to destroy Scraping Egg Masses off of trees to destroy Spotted LanterflySpotted Lanternfly Egg Masses.
  2. Check your property for Trees of Heaven.  These trees are a magnet for Spotted Lanternfly and must be removed.
  3. Don’t move outdoor items: Check for egg masses before transporting items such as furniture, stones or firewood to new locations.

Learn more about How To Get Rid of Spotted Lanternfly.

When to Hire a Professional

If you see only a few adult Spotted Lanternfly, you can easily squash and kill them yourself.  However, these insects usually attack trees in swarms. That’s when you need professional help.


Giroud’s Spotted Lanternfly Control Program

Giroud’s Spotted Lanternfly Control Program is based on the latest research from Penn State, the PA Department of Agriculture and the USDA.  It includes treatments to kill the pest on contact and control emerging pests.  Additionally, Giroud will inspect your property for Trees of Heaven and remove them.

Here’s how Giroud controls Spotted Lanternfly:Spotted Lanternfly Control Treatment

  1. Identify High Risk Trees: Since SLF feeds on so many species of trees, Giroud recommends protecting only the high-risk trees that are most valuable to your landscape
  2. Timing and TreatmentChemical control is most effective in the adult stage which typically spans July through November.  Research rated Dinotefuran and Bifenthrin as the best treatments for killing SLF.

  • Dinotefuran: Applied as a Basal Trunk Spray from July through September.  It kills SLF both on-contact and systemically.  For a few weeks after treatment, SLF are killed on contact or when they crawl on treated surfaces.  After the insecticide is absorbed through the tree’s vascular system, SLF are killed when they feed on the tree.  Treatment remains in the tree for up to 60 days.
  • Bifenthrin: Sprayed on trees with SLF from September through November (pictured).  This treatment kills SLF on contact and when SLF walk over surfaces with the residue on it.

  1. Number of Treatments Required: For the best protection, a systemic treatment is recommended early in the adult stage which starts in July.  Then, a systemic or contact treatment is applied in Fall.This approach targets adult SLF when pressure is most intense and hard to control. The exact number of treatments will depend on the timing for the Adult stage each season and the point in the season when your first application is completed.
  2. Fertilization: SLF are intense feeders that suck the sap from trees.  Fertilizing infested trees promotes healing and builds strength.
  3. Remove Tree of Heaven: While SLF attacks many of trees found in your yard, Tree of Heaven (Ailanthus) is its favorite host tree.  This tree is like a magnet.   Any Tree of Heaven on or near your property will attract SLF.   That’s why, these trees must be destroyed.  Our Tree Care team is trained to handle the Tree of Heaven.  It’s not simple.  Tree of Heaven is a fast spreader.  We recommend removing the tree and grinding the stump down as deeply as possible.  After removing the Ailanthus tree and stump, sprouts may still pop up on your property.  To remove them, you can simply grab the shoot by its base and pull upward gently to remove the sprout and all of its roots.  If the sprouts are too numerous, Giroud can apply a herbicide treatment to kill them.

Take Action

The first step is to find out if you have a Spotted Lanternfly problem.  Your Giroud ISA Certified Arborist will inspect your property, identify high risk trees and determine the best steps for control.

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