Udea profundalis
Pest description and crop damage The common name derives from the caterpillar's habit of tying leaves together with silk, creating a shelter. Caterpillars are greenish and somewhat translucent with two pale stripes along a darker a light brown head capsule. Larvae skeletonize leaves and may become abundant in sugar beet fields during late season. Adult moths are reddish-brown to tan with several dark wavy lines on the wings as well as protruding mouthparts that appear as a "snout." Moths rest on the foliage of beets and/or weeds and will readily take flight when disturbed.
Scouting and thresholds No economic thresholds exist, and no insecticides are registered for use against the false celery leaftier in sugar beet.