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North American Ecology (US and Canada)

Resident throughout North America (Scott 1986). Habitats are OPEN AREAS AT ALL ALTITUDES; COMMON IN ALFALFA FIELDS. Host plants are usually herbaceous and include many species, but mostly in one family, LEGUMINOSAE. Eggs are laid on the host plant singly. Individuals overwinter as 3rd or 4th instar larvae. There is a variable number of flights based on latitude (Scott 1986).


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