Technical highlights - Department of Primary Industries ...

Navua sedge
The foliar herbicide screening trial has
been completed. No herbicide treatment
adequately controlled navua sedge.
All herbicides reduced the number
of navua sedge live stems at 42 days
after treatment. These numbers had
increased at 84 days after treatment
in all treatments except those
containing glyphosate, in which live
stems continued to decline. However,
at 140 days after treament, live stem
numbers increased in all treatments,
with those not containing glyphosate
showing consistently more than 150% of
the baseline value (Table 21.2).
Although treatments containing
glyphosate were the most effective,
they are not selective and therefore not
suitable for use in grass-based pasture
systems and other non-agricultural
situations where selective herbicides
are required. Future research will
focus on Sempra and Sempra-based
herbicide mixes, including split herbicide
application in combination with
pasture management practices. Other
herbicides will be screened for efficacy
as necessary.
Bog moss
In the field trials, estimated biomass
reduction 120 days after treatment
for the herbicide, black plastic and
shadecloth treatments were 100%, 100%
and 95% respectively.
For the herbicide screening trial, we
made final assessments at 120 days after
treatment. We will now test the six most
effective herbicides (triclopyr, endothal,
diquat + guar gum, metsulfuron,
fumioxazin and carfentrazone) at four
rates each in a rates trial.
Funding in 2010–11
• Land Protection Fund ($62 000)
• Queensland Government
Collaborators
• Cairns Regional Council
• Cassowary Coast Regional Council
• Far North Queensland Regional
Organisation of Councils
More information
Key publications
Westcott, DA, Setter, MJ, Bradford, MG,
McKeown, A & Setter, S 2008,
‘Cassowary dispersal of the invasive
pond apple in a tropical rainforest: the
contribution of subordinate dispersal
modes in invasion’, Diversity and
Distributions 14(2): 432–9.
Mason, LB, Setter, MJ, Setter, SD,
Hardy, T & Graham, MF 2008, ‘Ocean
dispersal modelling for propagules
of pond apple (Annona glabra L.)’, in
RD van Klinken, VA Osten, FD Panetta
& JC Scanlan (eds), Proceedings of the
16th Australian Weeds Conference,
Queensland Weeds Society, Brisbane,
Queensland, pp. 519–21.
Setter, SD, Setter, MJ, Graham, MF
& Vitelli, JS 2008, Buoyancy and
germination of pond apple (Annona
glabra L.) propagules in fresh and salt
water’, in RD van Klinken, VA Osten,
FD Panetta & JC Scanlan (eds),
Proceedings of the 16th Australian Weeds
Conference, Queensland Weeds Society,
Brisbane, Queensland, pp. 140–2.
For further information on this
research project and access to key
publications, visit the invasive plant
and animal science pages on the
Biosecurity Queensland website at
www.biosecurity.qld.gov.au
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