Controlling thistles
Isolated plants or small patches can be removed using tools such as a hoe or mattock. Vigilant II can also be used by applying it to at least 50% of the leaves of the plant, wiping the applicator along the middle of each leaf.
When treating in grass pastures, ensure the pasture is slightly grazed and then after seven days treat with Lontrel Advanced + MCPA amine by boom application.
For more extensive thistle infestations, it is recommended to use Grazon Extra at 150 mL per 100 L of water (1.5 mL per 1 L) as a foliar spray with a knapsack or 12 volt sprayer.
Herbicides for control of thistles
Product# | Method of application | Rate* | State |
Lontrel® Advanced Herbicide |
Boom application |
25 or 35 mL/ha + 1 or 1.5 L/ha MCPA amine (500 g/L) |
NSW, Qld, SA, Tas, Vic |
Lontrel® Advanced Herbicide |
Boom application |
1 L/ha |
All |
Lontrel® Advanced Herbicide |
Foliar spray |
125 mL/100 L of water |
NSW, Qld, SA, Tas, Vic |
Grazon® Extra Herbicide |
Foliar spray |
150 mL/100 L of water |
All |
Vigilant® II Herbicide |
Leaf wiping |
Neat: 50% leaf area |
All |
# Note: Preferred product option in bold. * Consult label for details of growth stage and use, especially where range of rates is given.