Naked-stem carpetweed

Naked-stem carpetweed (Mollugo nudicaulis) is a herbaceous weed member of the Molluginaceae family. It is recognized as an aggressive annual plant that thrives in various soil types, particularly in sandy and disturbed soils, making it a common concern for agricultural land management in warm climates.

This species is predominantly found in tropical and subtropical regions across Africa, Asia, and northern parts of Australia. It invades a wide array of agricultural settings, including row crops, vegetable fields, and disturbed pastures, where it competes effectively with crops for essential resources like soil nutrients and water.

The biology of Mollugo nudicaulis is defined by a basal rosette growth habit and long, slender, leafless flower stalks. The plant produces a significant amount of tiny seeds that can persist in the soil seed bank for extended periods, facilitating rapid re-emergence if the soil is left unmanaged or after cultivation processes.

The economic impact of this weed is largely due to its competitive nature during the early vegetative stages of crops. By forming dense patches, it shades out emerging crop seedlings and extracts moisture from the topsoil, which leads to reduced crop growth rates, lower biomass production, and ultimately a decrease in the overall yield quality.

Management strategies for this weed require a multi-faceted approach to achieve consistent control:

• Cultural control, such as implementing crop rotation to break the weed's life cycle.
• Mechanical control, including frequent inter-row cultivation during the early stages of growth.
• Chemical control, utilizing post-emergence herbicides that are effective against broad-leaved weeds.

Effective management also involves post-harvest field hygiene and the prevention of seed set. By monitoring fields early in the season, growers can significantly reduce the pressure of Mollugo nudicaulis and protect the yield potential of their primary commodities.