Arctic mouse-ear

Arctic mouse-ear (Cerastium arcticum) is a member of the Caryophyllaceae family. As a perennial herbaceous plant, it is uniquely adapted to thrive in harsh, cold-climate environments. Its low-growing, mat-forming habit allows it to withstand severe weather conditions while effectively anchoring itself in tundra or sub-alpine soils.

This weed is primarily found in northern latitudes and high-altitude regions. In agricultural contexts, it poses a threat to pastures, forage crop stands, and occasionally in reclaimed land where intensive farming is practiced. Its presence is most problematic in areas with thin soils where the native vegetation has been disturbed.

The biology of this species is characterized by its resilience and ability to propagate both through wind-dispersed seeds and vegetative spread. The subterranean rootstocks are particularly difficult to eliminate once the plant has established a dense colony, as the root fragments can regenerate into new plants after mechanical disturbance.

The damage caused by Cerastium arcticum includes significant competition with cultivated crops for limited nitrogen and phosphorus. In pastures, it can quickly become dominant, reducing the forage value of the land by outcompeting more nutritious grasses and legumes that are essential for livestock grazing.

Management strategies focus on both preventive and reactive measures. Agronomic control involves intensive tillage in the early stages of weed infestation to destroy the root system. Chemical control, when necessary, requires the use of broad-spectrum systemic herbicides applied during the plant's active growth phase. Proper pasture management and the maintenance of a vigorous crop canopy are essential to suppress the re-establishment of this resilient weed.