Spongy Moths Formerly Known as Gypsy Moths.
Spongy Moths Formerly Known as Gypsy Moths. Spongy moths, formerly known as gypsy moths, are an invasive species in Wisconsin, capable of causing significant defoliation of trees. They are known to have outbreaks every 10-12 years, with the most recent one occurring in 2023. The caterpillars of the spongy moth are the destructive life stage, feeding on leaves and potentially weakening trees. Key Points about Spongy Moths in Wisconsin: Invasive Species: Spongy moths (Lymantria dispar) are not native to Wisconsin and were introduced from Europe, Asia, and North Africa. […]