Reed canarygrass (Phalaris arundinacea) is a stout, erect, perennial grass that is a major weed in winter crops and pastures worldwide. Flat, green leaf blades occur from spring to early summer, but tend to turn brown as the summer progresses. P. arundinacea is a highly variable species, varying in height, size and shape of inflorescence, and coloration.
Toxic components
All parts of P. arundinacea contains tryptamine alkaloids and potentially high levels of selenium. The toxicity increases when the plant is stressed, such as during certain environmental conditions such as drought, nitrogen fertilization, cloudy days, new growth or regrowth, top growth consumption, and leaf versus stem consumption. Cases of poisoning in livestock have been documented since 1942, primarily in Australia and New Zealand, with recent poisonings reported in Argentina, South Africa, Norway, and the United States. Sheep are considered to be the most susceptible species, but cattle and horses can also be affected.
Consumption of P. arundinacea can manifest in two different forms---as "sudden death", presenting as a neurologic or a cardiac syndrome or as "staggers", affecting the animal's locomotor abilities. The acute form is reversible, but the chronic form is not and is usually lethal.
- Incoordination
- Muscle Spasms
- Convulsions
- Death
MANUAL CONTROL: Hand pulling or digging works for small patches, however make sure to remove the entire root mass. Small infestations that are near the shoreline can help reduce the density by tarping with heavy duty plastic or non-woven geotextile fabric.
MECHANICAL CONTROL: Mowing could work if
