Staff from the North Carolina Department of Agriculture and Consumer Services (NCDA&CS) plan to address spongy moth infestations in Waynesville beginning as early as May 2, extending through May 5, weather permitting.
“We have a total of three blocks and 5,990 acres to treat,” stated Sara Lalk, NCDA&CS Forest Health Research Operations manager. She highlighted the necessity of the intervention, explaining, “In 2023, a total of 13 male moths were trapped in these blocks. That number jumped to 2,627 in 2024, warranting the need to treat.”
Helicopters flying at low altitudes will distribute Bacillus thuringiensis kurstakii (Btk), a biopesticide considered safe for humans, animals, and plants. This organic agent aims to control the increased populations of spongy moth caterpillars.
The moths, once called gypsy moths, damage over 300 tree and shrub species, with a preference for oaks and hardwoods. Infested areas risk severe tree defoliation, making them vulnerable to other pests, leading to tree mortality. The caterpillars also pose health risks to people with respiratory issues; their hairs and droppings can trigger allergic reactions.
Since the 1970s, NCDA&CS has managed spongy moth occurrences in North Carolina, working alongside the U.S. Department of Agriculture’s Forest Service.
Residents in affected areas were informed about the situation and treatment strategies earlier this year, in January and February. Information sessions allowed homeowners to voice concerns and ask questions.
For further details or to receive treatment notifications, access the NCDA&CS website or contact them at their toll-free number.
