Silflower
Guides
Eucosma giganteana
Giant Eucosma Moth
Eucosma giganteana is a North American tortricid moth and specialist herbivore of Silphium species. It has emerged as a major pest threatening the domestication of Silphium integrifolium (silflower), a novel perennial oilseed crop. Adults are active in early to mid-summer, with larvae damaging flower heads and root crowns. Flight capacity studies show adults can travel 23 km in 24 hours, with peak flight activity in morning hours.