Overview
Spongy moth (formerly gypsy moth) is a significant defoliating pest in many parts of North America. Eggs overwinter on bark in fuzzy tan masses. When caterpillars emerge in spring, they climb trees and begin feeding on leaves, with older trees often showing damage in the upper canopy first. A single caterpillar can consume up to one square meter of foliage during its development.
Signs of Infestation
- Egg masses on tree bark, often tan or buff-colored
- Caterpillars crawling on trunks and branches
- Skeletonized or completely defoliated leaves
- Frass (caterpillar droppings) accumulating under trees
- Increased vulnerability to other stresses and diseases
Treatment & Management
Early detection is key. Scraping egg masses in late fall or winter can reduce spring populations. For active infestations, biological controls like Bacillus thuringiensis or targeted insecticides may be necessary. Our team can assess population levels and recommend the most effective treatment strategy.
Why Choose Earth-Wise?
Our team has decades of experience treating spongy moth infestations throughout the Roaring Fork and Vail Valleys. We use integrated pest management approaches that are effective and environmentally responsible. Our ISA Certified Arborists can assess the infestation level and recommend the most appropriate treatment plan for your property.