Photo-Lock Haven Express

Where are they from?

They were imported to the United States from Europe in 1869. They were brought over to breed with silk worms. In recent publications the insect is called the Spongy Moth.

Why are they so harmful?

They are ferocious eaters and can lead to major defoliation with high populations of caterpillars. Oak trees are their preferred food source, but they will eat the leaves off most deciduous trees. Regular and repeated years of defoliation of trees can lead to death. Best way to control populations other than spray control is being able to identify and dispose of caterpillars, egg masses, and moths on your property.

How can I identify these insects?

Use identifying apps like Seek by iNaturalist (On both Apple and Google Play stores).

When unable to use phones, remembering what the insect in all stages looks like from pictures and descriptions is best. The caterpillars are black to gray with red and blue spots. They have hair like spines all over their bodies and can led to skin irritation when touched. Egg masses are a rusty orange color and stick to the bark of trees. The adult moths are white or brown in color with scalloped black patterns on their wings.

Where can I learn more?