Common mouse-ear

Common mouse-ear (Latin: Cerastium holosteoides, formerly known as Cerastium fontanum) is a perennial weed belonging to the Caryophyllaceae family. It is recognized for its creeping, prostrate growth habit and its ability to rapidly colonize disturbed soils, meadows, and agricultural land.

This species is found worldwide, thriving in moist, nutrient-rich soils. It poses a significant challenge in crops such as cereals, pastures, and various fodder crops. Because of its low growth profile, it is particularly difficult to control in dense crop canopies, where it competes effectively for moisture and nutrients.

The biology of common mouse-ear is defined by high reproductive flexibility. It spreads through both vast seed production and vegetative propagation via rooting nodes along its stems. This combination allows the plant to persist in the seed bank for several years, ensuring it emerges even after initial clearing.

The economic impact of this weed is largely due to its competitive nature in forage and seedling stages. By forming dense mats, it physically inhibits the establishment of desired crop species. In pastures, it degrades the nutritional value of the forage and can reduce the overall dry matter yield of the grass stand.

Effective management requires an integrated approach. Cultural control measures include mechanical disturbance such as harrowing and plowing to disrupt the root system, combined with competitive cropping practices. Chemical control often relies on selective broad-spectrum herbicides, though timing is critical, as control is most effective when the weed is in the seedling or vegetative growth stage.