Soursob weed is a persistent curse – but it can be beaten. Here’s how
When it comes to a battle of persistence between a weed and a human, the weed will win most of the time. That is one of the things that makes a weed a weed.
Soursob, an introduced weed from Africa, has become a persistent problem for Australians. Known as soursop, sourgrass, and Cape sorrel, among other names, this plant was originally planted in Australian gardens for its bright yellow flowers. The plant's edible, sour-tasting stems and clover-like leaves make it a popular snack for children. However, soursob's true nature is less appealing.
Containing significant quantities of oxalic acid, soursob can pose a serious threat when consumed in large amounts. In sheep, excessive consumption of the plant has even led to death. Though soursob has been used as a food or flavouring in its native South Africa, the situation is quite different in Australia.
Eradicating soursob is a challenging task, especially in rural areas where it can form large meadows. The plant spreads via bulbs and bulbils, making it difficult to control without herbicides or outcompeting it with shade-producing crops. In home gardens, chemical-free eradication methods demand immense patience and persistence. The best time for control is just before flowering, when the bulbs have depleted their resources and are vulnerable.
While soursob may seem like a persistent curse, it can indeed be beaten with time, effort, and the right techniques.
Written by urgent.news from The Conversation AU's reporting — not their text. Machine-written — may contain errors; check the original before relying on it.
