Liverseed grass (Urochloa panicoides)
Liverseed grass seedling
(Photo A. Storrie)
Liverseed grass (Urochloa panicoides) is a stoloniferous (runner-forming), summer-growing annual grass. The leaves are broad (to 15 mm) with wavy margins, loosely to densely hairy on both sides. The leaf blade is rolled in bud, and the ligule is a rim of short hairs. Seedling leaves, 20 to 100 mm long, are pale green and very broad with numerous hairs on margins and sheaths.
Adult leaves are similar; however, the leaf margins are slightly wavy or crinkled. As plants mature, the stems (tillers) become prostrate on fallow ground or more erect in crops. Prostrate stems can form roots at the nodes. Mature plants can sometimes form a mat-like ground cover in dense populations.
The seed-head is approximately 100 mm long and has two to seven spikes, 10 to 70 mm long, that branch off the main stem. Seeds are produced in two rows along one side of each spike.
Factors that make Liverseed grass a major weed:
- Emerges in one major flush
- Produces a large number of seeds
- Can develop resistance to herbicides
- Is a host for cereal diseases
Further detail about this weed including integrated weed management tactics that could be considered when developing a management plan can be found in the section on problem weeds in the Integrated Weed Management Manual.
Ecology and biology of common weeds are outlined in section 6 of the Integrated Weed Management Manual.
Managing glyphosate resistant liverseed grass in northern NSW (case study) (March 2013), Tony Cook, NSW DPI
Management of barnyard grass and liverseed grass (DAFF Qld)