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Knot Grass
Acronicta rumicis (Linnaeus, 1758)
Noctuidae: Acronictinae
2289 / 73.045
Photo © Jo Lashwood,  Thetford 09/04/2017

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Similar Species
Poplar Grey
Subacronicta megacephala
Coronet
Craniophora ligustri
Forewing: 16-20mm.
Flight: Two generations May-June. Aug-Sept.
Foodplant:   Herbaceous and woody plants.
Red List: Least Concern (LC)
GB Status: Common
Verification Grade:  Adult: 1
Status
Widespread and common.
Various open habitats including grassland, heathland, fens, scrub, gardens and open woodland.

Variable species, some examples of which can resemble other Acronicta species. The small curved white mark on the rear edge of each forewing. (resembling two small central white teeth when viewed at rest from above) are characteristic.

Recorded in 66 (89%) of 74 10k Squares.
First Recorded in 1873.
Last Recorded in 2025.
Additional Stats

Latest 10 Records
Date#VC10kArea
11/07/2025127TG32Neatishead / Barton Broad
11/07/2025128TL99Rockland St Peter
11/07/2025127TM39Loddon / Chedgrave
11/07/2025228TF51Wiggenhall
11/07/2025127TG10Cringleford (UEA)
11/07/2025128TF62King's Lynn
10/07/2025327TG42Eccles
10/07/2025128TF64Hunstanton
10/07/2025127TG31Upton
10/07/2025228TF62South Wootton
Further info: Acronicta rumicis
 
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