Parthenium found in Australia is native to North America but a distinctly different biotype occurs in South America. Parthenium is an annual herb with a deep taproot and an erect stem that becomes woody with age.
Parthenium costs the beef industry a total of $16.5 million per year and cropping industries several million dollars per year.
Parthenium weed is a declared Class 2 pest plant under Queensland legislation and a Weed of National Significance (WONS).
|Scientific name||Parthenium hysterophorus|
|Similar species||Annual ragweed|
|Spread||Seeds spread by water, vehicles, machinery, and stock, feral and native animals and in feed and seed.|
Hand weeding small areas is not recommended because: