IUCN threat status:

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Acronicta rumicis

"Knot Grass" redirects here. For the plant, see Polygonum.

The Knot Grass (Acronicta rumicis) is a moth of the family Noctuidae. It is distributed through the whole of Europe, the North of Africa, through Asia up to Korea and Japan.

The wingspan is 34–40 mm. The adults fly at night from May to July [1]. They are attracted to light.

The larvae feed on a range of herbaceous plants.



  • ^ The flight season refers to the British Isles. This may vary in other parts of the range.


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