Damage caused by loopers is ragged foliage. They rarely reach treatment status on peas and beans in the absence of other foliage feeders. Heaviest populations usually occur on late-planted crops. Cowpea curculios are rarely a problem on snap beans. These are caused when the adult punctures the pod to feed or lay eggs.
Damaged peas have small, dark, indented spots and often contain grubs.
Tufts of broom sedge, particularly at edges of woods, are favorite hiding places for overwintering adults. It is about inch long. Adults begin to leave their winter quarters in March or early April. This emergence continues until June or July or about the time that the first peas are available for egg laying. These overwintering adults are long-lived and may survive through August.