Staff from the North Carolina Department of Agriculture and Consumer Services (NCDA&CS) are set to start treating spongy moth infestations in Waynesville beginning May 2, contingent on weather conditions. Treatment may extend until May 5.
“We have a total of three blocks and 5,990 acres to treat,” said Sara Lalk, NCDA&CS Forest Health Research Operations manager. “The treatment is meant to address the reproducing population of spongy moths found in the area. 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 operating at low altitude will apply Bacillus thuringiensis kurstakii (Btk), a biopesticide for controlling high populations of spongy moth caterpillars. Btk is an organic substance that poses no harm to humans, pets, or plants.
Spongy moths, previously referred to as gypsy moths, can defoliate more than 300 tree and shrub species, primarily targeting oaks and hardwoods. Infestations may result in severe foliage loss, exposing trees to other pests and leading to tree mortality. There is also a public health concern, as caterpillar hairs and droppings could trigger significant allergic reactions in individuals, especially those with respiratory difficulties.
The NCDA&CS, in collaboration with the U.S. Department of Agriculture’s Forest Service, has been managing spongy moth outbreaks in North Carolina since the 1970s. Residents affected by the upcoming treatment were informed in January and February, and have participated in information sessions and provided public comments.
For additional details or to request treatment notifications via text or email, visit the official website or contact NCDA&CS toll-free.
