Latin name: Synanthedon bibionipennis
Reason for Concern:
Larvae can cause economic damage in red raspberries by girdling canes, which causes stunting and poor vigor.
Adults are clear winged moths that resemble yellow jackets, with a wingspan of about 20 mm. Forewings are nearly opaque with the edges dark bronze to almost black. Hindwings are transparent with dark veins and fringe. The abdomen is black and banded with yellow on the 2nd, 5th, and 6th segments. Mature larvae are about 20 mm long, and white, with a dark brown head.
Overwinters as a nearly mature larva in strawberry and caneberry crowns. Becomes active in early spring feeding for a short time before pupating in late spring. Adults emerge in late summer, mate, and lay eggs on dead leaves or green leaves around the plant base. Eggs hatch in about 2 weeks and young larvae feed on the outer crown at small root bases. As larvae mature, they bore deeper into crowns and are found in crown centers after about 1 month of feeding. Larvae feed in crowns until early October, then spin a cocoon to overwinter. There is 1 generation each year.