Spotted Lanternfly (SLF) is a destructive pest. Worse yet, it’s spreading quickly. There’s a lot at risk. PA’s orchards, vineyards and nurseries are in danger. Plus, SLF threatens the trees in your own yard.
What is the best way to control this pest? Giroud has been working closely with Penn State, the PA Department of Agriculture and the USDA to determine the best treatments and timing for control.
Based the latest research, Giroud’s SLF Program is a combination of targeted treatments and Tree of Heaven removal.
Giroud’s Spotted Lanternfly Control Program
Target Trees: SLF feed on an incredible variety of trees. Therefore, Giroud recommends protecting only high-risk trees that are most valuable to your landscape
Timing and Treatments: SLF is most vulnerable to chemical control in Adult stage. This stage lasts from July through November. For control, researchers tested numerous treatments. Dinotefuran and Bifenthrin yielded the best results. Both treatments kill on contact and have staying power.
Number of Treatments Required: The exact number of treatments depends on when the Adults emerge and your first application is completed. For the best protection, a systemic treatment is recommended in July at the typical beginning of the adult stage. Then, a systemic or contact treatment is needed again in Fall. This approach targets adult SLF when pressure is most intense and hard to control.
Fertilization: Fertilizing trees is also important to promote healing and build strength.
Remove Tree of Heaven: If there are any Tree of Heaven on or near your property, they will attract SLF. Giroud has the special PA permit required to destroy these trees. To kill it, the tree must be treated with an herbicide. Then, if desired, the tree and stump can be removed.
Spotted Lanternfly is a beautiful pest. But, don’t let looks fool you. It’s is destructive, dirty and prolific.
Identifying the Pest
You need to be a real detective to identify Spotted Lanternfly. That’s because, it goes through several changes in appearance during its lifecycle.
Lifecycle is 3 Main Stages
May-July: Young nymphs hatch in spring as small black bugs with white spots. By early summer, they gain red markings.
July-November: SLF is most vulnerable to chemical control at this stage. As adults, wings develop and are its true tell-tale. With wings open, the underside shows bright red on patterns of black, white and beige. Closed, the wings are purplish with black spots.
September-November: Adult females lay eggs in the fall. Eggs are laid on tree trunks or just about any flat surface. Females hide the eggs under a secretion that looks like dirt or clay.
Spotted Lanternfly’s favorite host tree is the Tree of Heaven (Ailanthus). Found in many landscapes and wooded areas, Spotted Lanternfly are drawn to Ailanthus trees like a magnet.
Besides the Tree of Heaven, Spotted Lanternfly also attacks other trees that are common in our region. High-risk trees include: Maple, Oak, Walnut, Poplar, Apple, Willow, Birch, Ash, Linden, and Sycamore.