Innocent weed

Cenchrus longispinus and Cenchrus spinifex
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innocent_weed_2_-_IW_Burrs_A_Harvey.jpg
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Weed profile

  • Annual
  • Grass
  • Contaminates produce
  • Injures animals
  • Habitat: pastures

Impact

Competes with irrigated crops. Burrs injure animals.

Description

  • Annual summer-growing grasses to 70 cm tall.
  • Soft hairless leaves.
  • Seed heads of several burrs about 7 mm wide with sharp spines.

Control options

  • chemical control

    glyphosate dual salt (360g/L)

    When: Spot spray, December - January

    Where: Conservation areas, bushland and other non-crop areas.

  • chemical control

    glyphosate (450g/L)

    When: Boom spray, summer

    Where: Fallows, pre-sowing.

  • chemical control

    fluazifop-p (128g/L)

    When: Boom spray, growing actively at 5 leaf to early tillering.

    Where: Citrus, grapes and stonefruit crops.

  • chemical control

    fluazifop-p (128g/L)

    When: Boom spray, growing actively at 3-5 leaf stage before tillering starts

    Where: Lucerne

  • chemical control

    chlorthal-dimethyl (750g/kg)

    When: Boom spray, autumn or early spring.

    Where: Lucerne and perennial grasses

  • chemical control

    chlorthal-dimethyl (750g/kg)

    When: Boom spray, at time of sowing or transplanting.

    Where: Vegetable crops.

  • chemical control

    trifuralin (480g/kg)

    When: Boom spray, pre-sowing.

    Where: Lupins, sunflowers, soybeans

  • physical control

    Manual removal

    When: Any time

    Where: Small infestations.

  • physical control

    Grazing

    When: December - January

    Where: Pastures.

glyphosate dual salt (360g/L)

Application Method: Spot spray

Application Rate: 1L/100L

Product Name: Weedmaster® Duo

Herbicide Group: 9

Situation: Conservation areas, bushland and other non-crop areas.

Timing: Spot spray, December - January

Comments: Non selective, avoid contact with desirable plants.

Legal Status: PER 13371 (exp. 2027)

glyphosate (450g/L)

Application Method: Boom spray

Application Rate: 800mL-1L/ha

Product Name: Roundup CT®

Herbicide Group: 9

Situation: Fallows, pre-sowing.

Timing: Boom spray, summer

Comments: Prior to cultivation and sowing a crop or pasture. Use higher rates on larger plants. Non selective, avoid contact with desirable plants.

Legal Status: Product and use are registered, but this weed is not on the label.

fluazifop-p (128g/L)

Application Method: Boom spray

Application Rate: 2.5L/ha

Product Name: Fusilade Forte 128 EC®

Herbicide Group: 1

Situation: Citrus, grapes and stonefruit crops.

Timing: Boom spray, growing actively at 5 leaf to early tillering.

Comments: Selective herbicide to kill grasses. Apply in not less than 200 L/ha

Legal Status: Registered

fluazifop-p (128g/L)

Application Method: Boom spray

Application Rate: 1.24L/ha

Product Name: Fusilade Forte 128 EC®

Herbicide Group: 1

Situation: Lucerne

Timing: Boom spray, growing actively at 3-5 leaf stage before tillering starts

Comments:

Selective herbicide to kill grasses. Apply in not less than 100 L/ha. Apply when lucerne is past the 2 to 3 trifoliate leaf stage.

Do not graze or cut for stock feed for 6 weeks after application.

Legal Status: Registered

chlorthal-dimethyl (750g/kg)

Application Method: Boom spray

Application Rate: 11-15 kg/ha

Product Name: Hemani Chlorthal 750 WG®

Herbicide Group: 3

Situation: Lucerne and perennial grasses

Timing: Boom spray, autumn or early spring.

Comments: Pre-emergent control. Use at least 450 L water/ha.

Legal Status: Registered

chlorthal-dimethyl (750g/kg)

Application Method: Boom spray

Application Rate: 9-15 kg/ha

Product Name: Hemani Chlorthal 750 WG®

Herbicide Group: 3

Situation: Vegetable crops.

Timing: Boom spray, at time of sowing or transplanting.

Comments: Pre-emergent control. Use lower rate on lighter soils. Use at least 450 L water/ha.

Legal Status: Registered

trifuralin (480g/kg)

Application Method: Boom spray

Application Rate: 1.2L/ha (light and medium soils) 1.7L/ha (heavy soils)

Product Name: Treflan 480®

Herbicide Group: 3

Situation: Lupins, sunflowers, soybeans

Timing: Boom spray, pre-sowing.

Comments: Pre-emergent control in certain broadleaf crops. Spray from 4 weeks to just before sowing takes place.

Legal Status: Registered

Manual removal

Situation: Small infestations.

Timing: Any time

Comments: Grub each plant and dispose securely to avoid dropping burrs. Follow up in the next season or after summer rains.

Grazing

Situation: Pastures.

Timing: December - January

Comments: Prevents seed set

Legal requirements in each region

To find out which landscape region you're in visit the NatureMaps website.
Alinytjara Wiluṟara
Control

Land owners in this region to take reasonable steps to kill plants and prevent their spread. Enforceable by the Alinytjara Wiluṟara Landscape Board.

Sale

Must not be sold or traded in any way, including as a contaminant of anything.

Movement

Must not be transported on a public road, including as a contaminant of anything.

Eyre Peninsula
Control

Land owners in this region to take reasonable steps to kill plants and prevent their spread. Enforceable by the Eyre Peninsula Landscape Board.

Sale

Must not be sold or traded in any way, including as a contaminant of anything.

Movement

Must not be transported on a public road, including as a contaminant of anything.

Green Adelaide
Control

Land owners in this region to take reasonable steps to kill plants and prevent their spread. Enforceable by the Green Adelaide Board.

Sale

Must not be sold or traded in any way, including as a contaminant of anything.

Movement

Must not be transported on a public road, including as a contaminant of anything.

Hills and Fleurieu
Control

Land owners in this region to take reasonable steps to kill plants and prevent their spread. Enforceable by the Hills and Fleurieu Landscape Board.

Sale

Must not be sold or traded in any way, including as a contaminant of anything.

Movement

Must not be transported on a public road, including as a contaminant of anything.

Kangaroo Island
Control

Land owners in this region to take reasonable steps to kill plants and prevent their spread. Enforceable by the Kangaroo Island Landscape Board.

Sale

Must not be sold or traded in any way, including as a contaminant of anything.

Movement

Must not be transported on a public road, including as a contaminant of anything.

Limestone Coast
Control

Land owners in this region to take reasonable steps to kill plants and prevent their spread. Enforceable by the Limestone Coast Landscape Board.

Sale

Must not be sold or traded in any way, including as a contaminant of anything.

Movement

Must not be transported on a public road, including as a contaminant of anything.

Murraylands and Riverland
Control

Land owners in this region to take reasonable steps to kill plants and prevent their spread. Enforceable by the Murraylands and Riverland Landscape Board.

Sale

Must not be sold or traded in any way, including as a contaminant of anything.

Movement

Must not be transported on a public road, including as a contaminant of anything.

Northern and Yorke
Control

Land owners in this region to take reasonable steps to kill plants and prevent their spread. Enforceable by the Northern and Yorke Landscape Board.

Sale

Must not be sold or traded in any way, including as a contaminant of anything.

Movement

Must not be transported on a public road, including as a contaminant of anything.

South Australian Arid Lands
Control

Land owners in this region to take reasonable steps to kill plants and prevent their spread. Enforceable by the South Australian Arid Lands Landscape Board.

Sale

Must not be sold or traded in any way, including as a contaminant of anything.

Movement

Must not be transported on a public road, including as a contaminant of anything.

More Information

Find out how to:

Control advice

For further help and advice managing this weed contact your regional landscape board:

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