By Blake Jackson
A recent study by Penn State researchers suggests that insect predators native to the United States could help manage spotted lanternfly populations, reducing the need for chemical pesticides. The invasive pest, first detected in 2014, has spread across at least 18 states, causing damage to vineyards, orchards, and nurseries.
The study, published in Arthropod-Plant Interactions, explored the effectiveness of natural predators in controlling spotted lanternflies. Researchers found that spined soldier bugs, Carolina mantises, and Chinese mantises were particularly effective in feeding on the pest. Encouraging these predators in affected areas could provide a sustainable approach to pest management.
“Our study shows that several native and naturalized predators can consume spotted lanternflies effectively,” said lead researcher and doctoral candidate Anne Johnson, who conducted the study with Kelli Hoover, professor of entomology. “By leveraging natural enemies already in the environment, we hope to develop a sustainable, low-impact approach to managing this invasive species that will complement other control methods.”
One concern is that the spotted lanternfly feeds on the tree of heaven, a plant known for its bitter chemical compounds. Researchers investigated whether these chemicals made the pest less appealing to predators. They tested 10 predatory insects, including spined soldier bugs, praying mantises, wheel bugs, and lady beetles. Results showed that spined soldier bugs and mantises consumed lanternflies effectively, regardless of the pest’s diet.
Community science played a role in shaping the study. From 2020 to 2022, the public submitted nearly 2,000 photos of native insects preying on spotted lanternflies. This data helped researchers identify key predators to test.
While these findings are promising, researchers emphasize that insect predators alone cannot eliminate the problem. Future studies will test their effectiveness in real-world conditions. The study highlights the potential of natural predators in integrated pest management strategies, combining biological and chemical control methods for better results.
Funding for this research came from several organizations, including the U.S. Department of Agriculture and the Pennsylvania Department of Agriculture. More management strategies are available in Penn State Extension’s Spotted Lanternfly Management Guide.
Photo Credit: spotted-lanternfly-pennsylvania-department-of-agriculture
Categories: Pennsylvania, Education