Bathurst Burr Identification
Bathurst burr is an erect, much-branched annual herb, up to 1 m high but usually 30 to 60 cm. Leaves are dark green on the upper surface, a paler green on the under surface, up to 7 cm long and usually three lobed. Stems are branched with one or two three-pronged yellow spines at the base of each leaf stalk. Flowers are creamy green and small, developing into straw-coloured burrs, 1.0 to 1.5 cm long, with numerous yellow hooked spines. Each burr contains two seeds. Of the two seeds present in each burr, only one will germinate in a single season. The other seed will remain dormant for two or three years, sometimes longer.
How to kill Bathurst Burr
For best control of Bathurst Burr use StaraneTM Advanced Herbicide at a rate of 45 mL/ 100 L water and spraying is most effective on young plants and should occur before any burrs are formed to prevent seeding.
Herbicides for killing Bathurst Burr
#Note: Preferred product option in bold. *Consult label for details of growth stage and use, especially where range of rates is given.