Herbicides for Japanese Knotweed Control

Disclaimer

These herbicide recommendations are made subject to the product being registered for that purpose under relevant legislation. It is the user's responsibility to check that registration or an off-label permit covers the proposed use. Always read the herbicide label.

If in doubt, visit the Australian Pesticides and Veterinary Medicines Authority (APVMA) website at www.apvma.gov.au.

Only herbicides registered for use in pasture and/or non-cropping situations are listed in the following table. For recommendations in specific crops consult an agronomist.

Care must be taken in using herbicides as non-target plants contacted may be harmed.

Wetting agents

Carefully consult the product label for specific directions regarding the use of wetting agents or adjuvants.

Waterways and wetlands

Be careful! Many herbicides can cause damage to waterways and wetlands. Check the herbicide label directions carefully before use near waterways and wetlands. For more information see Guidelines for Safe and Effective Herbicide Use Near Waterways.

Herbicide brands and concentrations

Herbicides are referred to by the active chemical ingredient in the following table. The product trade names in this publication are supplied on the understanding that no preference between equivalent products is intended and that the inclusion of a product does not imply endorsement by DPIPWE over any other equivalent product from another manufacturer. Information on available brands containing the herbicide you require should be obtained from a reputable herbicide supplier or the APVMA website at www.apvma.gov.au.

There may be a number of products with the same active ingredient but with alternate formulations (concentration) registered for control of a weed eg: Glyphosate 360 g/L, Glyphosate 450 g/L may be registered for use on the same weed. Alternate formulations such as these will have a different application rate. Always check the label.

Native vegetation, conservation areas, gullies, reserves and parks

Stage of Growth	Herbicide (active ingredient & concentration)	Example of commercial product	Application rate of commercial product	Withholding period	Comments
Actively growing to mature	**Picloram gel (43 g/kg)	Vigilant® Herbicide Gel	Gel applied direct from brushbottle. Refer label for instructions.	Not for use in grazing or food production	Avoid use over or near desirable plants, or in areas where their roots might extend or where the chemical might be washed or moved onto their roots. Do not use if rain is likely to fall within 12 hours of application. Not to be used near ponds, waterways or drains.

Non-crop and bushland

Stage of Growth	Herbicide (active ingredient & concentration)	Example of commercial product	Application rate of commercial product	Withholding period	Comments
Actively growing to mature	Glyphosate* (360 g/L) where product has an aquatic registration	Weedmaster® Duo Roundup Biactive®	Foliar application 10-13 ml per L water		In accordance with APVMA Permit PER84775 spot spraying / knapsack. Add surfactant/ wetting agent in accordance with product label. Thorough application to top and underside of leaves.
			Cut stump application 1:5 - undiluted		In accordance with APVMA Permit PER84775.
	Triclopyr 300 g/L* + **picloram 100 g/L*	Grass-uptm, conqueror®, Hatchet	spot spraying, knapsack 350 -500 ml per 100 L water		In accordance with APVMA Permit PER84775. Avoid use over or near desirable plants, or in areas where their roots might extend or where the chemical might be washed or moved onto their roots. Do not use if rain is likely to fall within 12 hours of application. Not to be used near ponds, waterways or drains.
	Triclopyr 240 g/L* + **picloram 120 g/L*	A	AccessTM	As per existing registrations or if weed not recorded on label: 1:60 in diesel

For further information on permit details visit the APVMA website at www.apvma.gov.au.