Large annual or biennial prickly thistle < 2.5 m tall and < 2 m in diameter. Leaves are variegated, with white veins and blotches. Flowers are purple, surrounded by spines and borne in late spring – summer. Achenes bear pappus and ripen in summer – autumn.
To help protect our environment:
Pasture, croplands, river flats, roadsides.
Seeds dispersed by wind and contaminated soil, machinery and animals.
Competes with valued pasture plants. Can be toxic to livestock.
Maintaining good pasture cover can prevent establishment or suppress an infestation. Prevent overgrazing especially in summer. Other herbicides are available for selective use in pasture.
CAUTION: When using any herbicide or pesticide please read the label thoroughly to ensure that all instructions and safety requirements are followed.