Japanese spongy moth (Lymantria dispar japonica) is an insect pest of variety of hardwood trees. It is a native of Asia.
All species of lymantria dispar share similar biology and ability to become a pest. This species is native to Japan. Damage to trees occurs as larval caterpillars defoliate the branches.
For more information about this plant pest, see the CAPS data sheet and the CABI data sheet.