The adult moth is variable in patterning and coloration with a wingspan of 30 to 38 mm. The forewings of the velvetbean caterpillar moth vary from ash gray to light yellowish-brown to dark reddish brown. The hind wings are light brown with a row of light colored spots near the margin. A dark diagonal line extends across both sets of wings when the wings are fully extended.
Damage: Velvetbean caterpillars cause damage by consuming foliage. Newly hatched larvae strip the leaf, beginning with the lower epidermis and mesophyll. They continue feeding until the end of the second instar, eating all the soft leaf material and leaving only the veins intact. Eventually the velvetbean caterpillar consumes the entire leaf. Once the upper leaves and lower leaves have been consumed, foliage in the middle and lower canopy is consumed and complete defoliation may result. The velvetbean caterpillar may also attack tender stems, buds, and small bean pods.