The spongy moth, formerly known as the gypsy moth (Lymantria dispar), is a significant pest in North America, causing substantial damage to forests and ornamental trees. Here’s a closer look at this invasive species, its life cycle, impact, and management strategies.
What is the Spongy Moth?
The spongy moth is a species of moth native to Europe and Asia. It was introduced to North America in the 19th century and has since become a notorious invasive species. Its larvae, commonly referred to as caterpillars, are known for their voracious appetite and can cause severe defoliation in trees and shrubs.
Life Cycle
The spongy moth undergoes a complete metamorphosis, transitioning through four life stages:
Eggs: Females lay eggs in masses covered by a dense layer of hair-like scales. These egg masses are often found on tree trunks, rocks, or outdoor equipment. The eggs hatch in late spring.
Larvae (Caterpillars): The larvae are the most damaging stage. They are known for their spongy, hairy appearance, hence the name. Caterpillars feed aggressively on leaves, leading to significant defoliation. They go through several molts before pupating.
