CALTHROP

Caltrop (Tribulus terrestris) is a summer-growing weed found widely throughout Australia. It is most common in areas of frequent spring and after summer rain. While it is a prescribed pest plant in a number of areas it is not a declared plant, and there is no requirement to report it to the Department of Agriculture and Food.
Caltrop has seeds that remain dormant in the soil for probably four to five years. They germinate after summer rain. Plants grow rapidly, flowering and forming new burrs within three to five weeks.

Caltrop (Tribulus terrestris) impacts agriculture and people by growing over and out-competing other plants, and causing injury and damage to people and animals via the large numbers of spiny fruits (nutlets) that each plant produces.

Caltrop (Tribulus terrestris) is widespread throughout all mainland Australian States and Territories, except perhaps for northern Australia where the very similar Tribulus cistoides (also known as Caltrop) is found in coastal areas. It is absent from Tasmania.

Spray FireHawk Bioherbicide Concentrate: 50 mL/L of water. Respray if required