Is it harmful to the wooden home that there are elm green hairy glowworms on the windows of the home

No. Adults feed on elm leaves, and their eggs are mostly located on the leaves, although some are laid in the crevices of the bark, and after hatching, the larvae feed on the leaves or suck the sap.

There is no threat to solid wood furniture, for compressed wood furniture that is not covered with a coating, or the coating is off, the adult should be avoided from laying eggs on the shedding side, otherwise some larvae may hatch, and some are born in the bark gaps, or the compressed wood chips with the coating peeling off should avoid the adults laying eggs on the shedding side, although they will not eat the furniture. At present, there is no effective method of control of spraying drugs, and the spawning is mostly located on the leaves, for which there is no coating covering.