Synonyms and other taxonomic changes
Trichoplusia ni (Hübner, )
Noctua ni Hubner, 
Plusia humilis Walker, 1858
P. florida Dannehl, 1929
* phylogenetic sequence #931168
Explanation of Names
Ni: chemical symbol of the element Nickel; perhaps the silvery-white stigma on the adult's forewing was reminiscent of nickel to Hubner, who described the moth, but this is pure speculation.
The only species in this genus in North America; variably common throughout range.
Forewing length 15-18 mm (Pogue, 2005)(1)
Larva to 32 mm
Adult - forewing a blend of light and dark brown, showing very little overall contrast; stigma consists of small U-shaped inner spot usually not touching solid outer spot; terminal line scalloped; hindwing gleaming grayish-brown, darker in outer half.
Larva - green with thin white stripes down the back, and a single thicker white stripe along the side.
Cosmopolitan, introduced in the Nearctic. In North America, from Florida to California, north to British Columbia, east to Newfoundland (adults migrate north in late summer to northern United States and southern Canada) in the Americas, occurs south to Argentina.
Fields, gardens; adults are nocturnal and come to light.
Adults fly from March to October.
Larvae feed on cabbage, broccoli, brussel sprouts, kale, cauliflower, asparagus, beets, lettuce, and many other garden crops. Found and reared on wild Mohavea confertiflora (Desert Ghost Flower) (Southwestmoths.org).
One to three or more generations per year.
Larva; pupa; adult
Gray Looper Moth
) forewing shows more contrast, and lines are more distinct (compare photos of both species
at CBIF). Several other members of the subfamily Plusiinae are similar.
Covell Jr., C. V. 1984. A field guide to the moths of eastern North America. p.155, pl.31, f.10 (2)
Eichlin, T. D. & H. B. Cunningham 1978. The Plusiinae (Lepidoptera: Noctuidae) of America north of Mexico, emphasizing genitalic and larval morphology. USDA Tech. Bull. 1567: 1-122 (PDF
Lafontaine, J. D. & R. W. Poole 1991. Moths of America North of Mexico, Fascicle 25.1: p.44; pl.1.8-9
Pogue, M. G. 2005. The Plusiinae (Lepidoptera: Noctuidae) of Great Smoky Mountains National Park. Zootaxa 1032: 1–28 (1)
Powell, J. A. & P. A. Opler 2009. Moths of Western North America. University of California Press. pl.49.25f, p.277 (4)
live adult images
plus common name reference [Ni Moth] and food plants (Moths and Butterflies of Europe and North Africa)
live adult images
and other info (Keith Naylor, Barry Stewart, Paul Gay, UK Moths)
live larva image
plus common name reference [Cabbage Looper] and description (John Jackman, Texas A&M U.)
and flight season (Ohio State U.)
- life cycle, host info and photos