
Three-cornered Jack
Emex australis
Other Common Names:
Spiny Emex, Three-cornered Jack, Double Gee, Cat's HeadWeed Type:
Annual WeedCharacteristics:
Prostrate annual, light green leaves, woody thornsControl Methods:
Hoeing & Spraying with herbicideActive Ingredient / Herbicides:
2,4-D (e.g., Turfweeder) MCPA (e.g., Banweed) Dicamba (e.g., Dicamba 500 EC)About this weed
Emex australis is a widespread and common weed in South Africa and Namibia.
It is also known as Spiny Emex, Three-cornered Jack, Double Gee, and Cat’s Head.
It is a serious weed in South Africa, where it can be found in wheat, other cereals, and vineyards.
The spiny fruits are structured so that a spine is always pointing up, which aids in dispersal.
However, the spines may cripple animals and injure barefoot humans.
Emex australis is an annual herb that spreads horizontally with the ends growing upward.
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