walnut moth

noun

Definition of walnut moth

: any of several moths whose larvae eat the foliage of the walnut: such as

a : regal moth

b : imperial moth

c : luna moth

d : any of several red underwings of the genus Catocala

e : a dagger moth (Acronicta americana) found also on the maple

f : any of three arctiid moths of the genus Halisidota (H. caryae, H. tesselaris, H. maculata)

g : a moth (Datana integerrima) whose larva feeds on and often defoliates walnut, hickory, birch, oak, chestnut, linden, and apple