Sawflies are fairly abundant in blueberry fields in some years, but their feeding does not seriously affect the crop. N. litura is commonly found in most areas, whereas the others are scarce. Its larvae are usually green, but occasionally pink specimens are found. They are present both in the daytime and at night and feed on the outer edges of the leaves during May and early June. The adults emerge in the following spring and lay their eggs within leaf buds.
Sawflies are more abundant in mowed fields than in burnt fields.
Stem galls are found occasionally on a few plants in blueberry fields.