African milk tree

Euphorbia trigona, commonly known as the African milk tree, belongs to the Euphorbiaceae family. While primarily recognized as an ornamental succulent, it can behave as a hardy and invasive weed in favorable climates. Its ability to propagate rapidly from stem cuttings makes it a challenging plant to manage once it has established itself in non-native environments.

The biological profile of this plant is defined by its succulent nature, allowing it to store moisture in its stems for extended periods. It is highly resistant to drought and thrives in various soil types, which helps it compete aggressively with native vegetation or crops. Its root system is shallow but efficient, and the plant can quickly occupy abandoned plots or neglected agricultural fields.

In field conditions, Euphorbia trigona poses significant risks to livestock and agricultural balance. The plant is considered toxic due to its milky white latex. When ingested by grazing animals, it causes severe irritation of the digestive tract and can be fatal in large quantities. The caustic sap also poses a risk of contact dermatitis to farmers and workers managing the land.

Management of this weed requires strict adherence to safety protocols. When manually clearing infestations, protective equipment, including gloves and goggles, is mandatory to prevent skin and eye contact with the toxic sap. Leaving stem fragments on the ground is a common mistake that leads to secondary infestations, as these fragments easily take root.

Chemical control is generally required for large-scale infestations. Systemic herbicides are the most effective, but they must be applied during the plant's active growth phase. Because the plant surface is coated with a waxy cuticle, surfactants must be added to the herbicide solution to ensure adequate absorption. Ongoing monitoring and preventive removal of young shoots are essential for long-term suppression of this species.