Ireland

Pea and bean weevil

Sitona lineatus

Pea and bean weevils are beetles that eat the leaf margins and shoot tips of garden peas and broad bean, causing characteristic notch-like damage.

Symptoms

The adult beetles are greyish brown and are 4-5mm long. They tend to drop to the ground when disturbed, so can be difficult to find. Their feeding activities are readily detected as the beetles eat a series of U-shaped notches around the edges of the leaves. The larvae feed unseen underground on the plants' root nodules.

The amount of leaf area lost to pea and bean weevils is generally small, even when the foliage has been extensively nibbled. Established pea and broad bean plants can generally tolerate this damage, but may suffer a check in growth if small seedlings are heavily infested.