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North West Weeds
ABN 16 052 158 879
Postal address:
20 Dinoga Street
BINGARA
NSW 2404
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  Serrated
tussock (Nassella trichotoma) is considered by many to be this
State’s worst weed. It accounts for a greater reduction in carrying capacity of
grazing land than any other weed in Australia. It is of major significance to
conservation systems as well. A native of South America, serrated tussock
(Nassella trichotoma) was first recorded in NSW at Yass in 1935.
IDENTIFICATION
A difficult plant to identify in its early stages. A dense, tussocky perennial
grass up to 50cm high. Leaves are fine, tightly rolled, light green in colour
except in winter when they are bleached and more of a straw green. It is at this
time the plants are most easily detected. It is also at this time when treatment
is urgent required to prevent seed set.
THE
PROBLEM
 
Serrated tussock produces vast quantities of viable seeds (click on image,
right), which are easily
distributed long distances by wind and water, or stock and fodder movements. The plant is of low palatability and low
digestibility to grazing animals. The preferential grazing of other pasture
plants allows serrated tussock to reproduce freely and suppress competition.
LEGAL REQUIREMENTS
Serrated tussock is a declared NOXIOUS WEED in many parts of New South Wales. It
is a very serious weed and early detection and treatment is essential to prevent
this weed taking over the property.
CONTROL METHODS
According to Industry & Investment NSW’s excellent booklet “Noxious and
Environmental Weed Control Handbook (Fourth Edition)", treatments for
serrated tussock include:
Non-Chemical Options:
Competition:
Established of perennial pasture together with good grazing management will
assist control. Grub out single plants.
Chemical Options:
| Chemical |
Rate: Spot/Boom |
Comments |
|
Flupropanate 745 g/L
Various trade names eg Taskforce® |
2.0 L/ha
150-200 mL per 100L of water |
Boom and aerial application.
Spot spray, from September to May. Four (4) month stock withholding
period for blanket application. |
|
PERMIT 10982.
Flupropanate 745 g/L
Various trade names eg Taskforce® |
1.5-2.0 L/ha |
Boom and aerial application. June to August
inclusive. Four (4) month with-holding period for blanket application. |
| 100-200 mL per 100L of water |
Spot spray treatment. |
PERMIT 10919
Glyphosate 360 g/L
Various trade names |
1.0 L per 2.0 L of water |
Wick wiper application. |
Glyphosate 360 g/L
Various trade names - for aquatic use only eg Roundup Biactive® |
0.7-1.3 L to 100 L of water |
Spot spray application |
| 4.0-6.0 L/ha |
Boom spray. Apply to actively growing, stress-free plants.
|
| 0.75-1.25 L/ha |
Spray topping application. Apply to actively growing,
stress-free plants. |
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NB: Further
information on chemical treatment is available from NSW DPI
Permit PER9792
 -
February 2012 |
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North West Weeds
