Kochia control

Page last updated: Monday, 20 July 2020 - 2:12pm

Control methods for kochia (Bassia scoparia) a declared pest in Western Australia.

REPORT THE PRESENCE OF THIS PEST BEFORE UNDERTAKING CONTROL

Information about this pest can be found on the kochia: declared pest page.

Login or set up a new account on DPIRDs online training site to access:

Chemical requirements

When using any agricultural chemicals please ensure that you always follow instructions on the label and any permit. Users of agricultural chemical products must always strictly comply with the directions on the label and the conditions of any permit. To view permits or product labels go to the Australian Pesticides and Veterinary Medicines Authority website.

Chemical control options

Chemical control options can be found below. For other methods of control please refer to the declared plant control handbook.

Recommended herbicides

Small seedlings
  • Diquat + paraquat
  • Bladex®
  • Chlorsulfuron
  • Bromoxynil
  • Glyphosate
  • Diuron
Spring-summer, seedlings to adult plants
  • Glyphosate + Diuron + 2,4-D ester
  • 2,4-D amine
Herbicide: Glyphosate + Diuron + 2,4-D ester

Active ingredient

360g/L glyphosate (Group M)
+ 500g/L or 900g/kg diuron (Group C)
+ 600/680g/L 2,4-D LV ester (Group I)

Amount of product/10L water

7.5mL glyphosate
+ 15mL or 8g diuron
+ 7.5mL 2,4-D ester

Rate of product/ha

0.75L glyphosate
+ 1.5L or 0.8kg diuron
+ 0.75L 2,4-D ester

Wetting agent dilution

Under hot conditions add 1% crop oil

Time of application

Spring to summer, seedlings to adult plants

Remarks

  • Saltbushes will be killed
  • Care should be taken applying 2,4-D ester near tomatoes, grape vines and plant nurseries.

More information and control methods

Other formulations of glyphosate are available for example, 450, 490, 500, 540g/L, and 680 and 840g/kg

Herbicide: 2,4-Damine(Group I) (various trade names: see APVMA link)

Active ingredient

  1. 500g/L 2,4-D amine
  2. 625g/L 2,4-D amine
​Rate of dilution for spot spraying
  1. 1:500 for 500g/L 2,4-D amine
  2. 1:625 for 625g/L 2,4-D amine

Amount of product/10L water

  1. 20mL for 500g/L 2,4-D amine
  2. 16mL for 625g/L 2,4-D amine

Rate of product/ha

  1. 2L for 500g/L 2,4-D amine
  2. 1.6L for 625g/L 2,4-D amine

Wetting agent dilution

1:400

Time of application

Spring to summer, seedlings to adult plants

Remarks

Saltbushes will be killed

Herbicide: Diquat + paraquat  (Group L) (various trade names: see APVMA link)

Active ingredient

135g/L paraquat + 115g/L diquat

​Rate of dilution for spot spraying

1:500

Amount of product/10L water

10–20mL

Rate of product/ha

1–2L

Wetting agent dilution

1:400

Time of application

Small seedlings

Remarks

Higher rates 3–5L needed for larger bushes and to treat flowering bushes to prevent seed formation

Herbicide: Bladex® (Group C)

Active ingredient

500g/L cyanazine

​Rate of dilution for spot spraying

10mL

Amount of product/10L water

1L

Rate of product/ha

1L

Wetting agent dilution

1:400

Time of application

Small seedlings

Remarks

  • Saltbush (wavy leaf) will not be killed
  • A 900g/kg also available

Herbicide: Chlorsulfuron (Group B) (various trade names: see APVMA link)

Active ingredient

750g/kg chlorsulfuron

​Rate of dilution for spot spraying

1g/50L

Amount of product/10L water

0.2g

Rate of product/ha

20g

Wetting agent dilution

1:400

Time of application

Small seedlings

Herbicide: Bromoxynil (Group C)  (various trade names: see APVMA (various trade names: see APVMA link) link)

Active ingredient

200g/L bromoxynil

​Rate of dilution for spot spraying

1:2000

Amount of product/10L water

5mL

Rate of product/ha

0.5L

Wetting agent dilution

1:400

Time of application

Small seedlings

Herbicide: Glyphosate (Group M) (various trade names: see APVMA link)

Active ingredient

360g/L glyphosate

​​​Rate of dilution for spot spraying

1:2000

Amount of product/10L water

5mL

Rate of product/ha

0.5L

Wetting agent dilution

Small seedlings

Time of application

  • Other concentrations of glyphosate available
  • These can be substituted for the 360 concentration by adjusting the rates

Herbicide: Diuron (Group C) (various trade names: see APVMA links)

Active ingredient

  1. 500g/L diuron
  2. 900g/kg diuron

Amount of product/10L water

  1. 25mL
  2. 15g

Rate of product/ha

  1. 2.5L
  2. 1.5kg

Wetting agent dilution

1:400

Time of application

Small seedlings

Contact information

Pest and Disease Information Service (PaDIS)
+61 (0)8 9368 3080