Agrobase Australia
Cotton thistle (scotch thistle)
Onopordum acanthium

Biennial taprooted herb to 1 m high; stems woolly or densely cobwebby, with continuous spinose wings c. 10 mm wide.

Leaves mostly cauline, lanceolate, 10–35 cm long, 3–10 cm wide, margins toothed with numerous robust spines to 10 mm long, base decurrent on stem, lower surface more densely tomentose than upper surface.

Effective on
AllOut 450
Efficiency: ★★★
Allout 720
Efficiency: ★★★
Broadway
Efficiency: ★★★
Canvas 750
Efficiency: ★★★
Cheminova Dicamba 500 SL Selective
Efficiency: ★★★
Cutlass 500
Efficiency: ★★★
Cutlass M
Efficiency: ★★★
FMC Clopyralid 750 WG
Efficiency: ★★★
FMC Dicamba 700 WG
Efficiency: ★★★
FMC Glyder 450
Efficiency: ★★★
FMC Glyphosate 510
Efficiency: ★★★
FMC Glyphosate 540 K
Efficiency: ★★★
FMC LVE MCPA 600
Efficiency: ★★★
FMC MCPA LVE 570
Efficiency: ★★★
Glyder Dry 700
Efficiency: ★★★
Glyder Offense 540
Efficiency: ★★★
LVE MCPA 570
Efficiency: ★★★
MCPA 750
Efficiency: ★★★
Reglone
Efficiency: ★★★
Romazina 900 WDG
Efficiency: ★★★
Rophosate 450SL
Efficiency: ★★★
Rophosate 510
Efficiency: ★★★
Rophosate 700
Efficiency: ★★★
Rotam LVE MCPA 57
Efficiency: ★★★
Rotam MCPA 750 Amine
Efficiency: ★★★
Roundup CT Broadacre Herbicide By Monsanto
Efficiency: ★★★
Roundup Dry Herbicide By Monsanto
Efficiency: ★★★
Roundup Dura Herbicide By Monsanto
Efficiency: ★★★
Roundup Max Herbicide
Efficiency: ★★★
Roundup Power Max Herbicide By Monsanto
Efficiency: ★★★
Roundup Ready Herbicide By Monsanto
Efficiency: ★★★
Roundup Ready Herbicide With Plantshield By Monsanto
Efficiency: ★★★
Roundup Ultra Max
Efficiency: ★★★
Rumba 300
Efficiency: ★★★
Rumba 750 SG
Efficiency: ★★★
Simagranz
Efficiency: ★★★
Simanex 900 WG
Efficiency: ★★★
Uni-VerT 300 Selective
Efficiency: ★★★
UPL MCPA 500 Selective
Efficiency: ★★★
Wildebeest 700
Efficiency: ★★★
Wipe-Out 450
Efficiency: ★★★
2,4-D 300 Ipa
Efficiency: not_available
Agroxone 750
Efficiency: not_available
Amine 300
Efficiency: not_available
Archer
Efficiency: not_available
Arysta LifeScience Clopyralid 750 SG
Efficiency: not_available
Arysta LifeScience Dicamba 500
Efficiency: not_available
Arysta LifeScience Glyphosate 700
Efficiency: not_available
Arysta LifeScience LVE MCPA 570
Efficiency: not_available
Arysta LifeScience MCPA 750
Efficiency: not_available
Barmac Twin
Efficiency: not_available
Bazooka Dry 800 SG
Efficiency: not_available
Bromoxapac
Efficiency: not_available
Camquesta 500
Efficiency: not_available
Camquesta 700 SG
Efficiency: not_available
Clop 300
Efficiency: not_available
Clop 600
Efficiency: not_available
Clop 750 SG
Efficiency: not_available
Conquest LVE MCPA 500
Efficiency: not_available
Conquest LVE MCPA 570
Efficiency: not_available
Conquest MCPA 500
Efficiency: not_available
Conquest MCPA 750
Efficiency: not_available
Corsair
Efficiency: not_available
Corsair Dry 750 SG
Efficiency: not_available
Dicam 500
Efficiency: not_available
Dicam 700 WG
Efficiency: not_available
Double Time
Efficiency: not_available
Gladiator Dry 680 WG
Efficiency: not_available
Glycel 450
Efficiency: not_available
Glypho 450
Efficiency: not_available
Glypho 680
Efficiency: not_available
Glyphosate 450
Efficiency: not_available
Knockout Pro 540
Efficiency: not_available
Lontrel 750 SG
Efficiency: not_available
LVE 600 MCPA
Efficiency: not_available
Lve Mcpa 570 EC
Efficiency: not_available
Mongrel 750
Efficiency: not_available
Polo 570 Lve
Efficiency: not_available
Sanction 200
Efficiency: not_available
Sipcam LVE MCPA 570
Efficiency: not_available
Sixgun 510
Efficiency: not_available
Sylon 750
Efficiency: not_available
Sylon 750 SG
Efficiency: not_available
Thistle-Killem 750
Efficiency: not_available
Touchdown 450
Efficiency: not_available
Touchdwn Hitech
Efficiency: not_available
Transit
Efficiency: not_available
Transit 750
Efficiency: not_available
Victory
Efficiency: not_available
Victory 750 SG
Efficiency: not_available
Volley SG
Efficiency: not_available
Warlord 540
Efficiency: not_available
Wipe-Out Accelerate
Efficiency: not_available