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Increasing foliar herbicide options for controlling Clidemia hirta (L.) D. Don

Brooks, S. J., Setter, S. D., Gough, K. L. and Setter, M. J. (2016) Increasing foliar herbicide options for controlling Clidemia hirta (L.) D. Don. In: 20th Australasian Weeds Conference, 11-15 September 2016, Perth, Western Australia.

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Article Link: http://caws.org.au/awc/2016/awc201613211.pdf


Clidemia hirta (L.) D.Don. (Koster’s curse) is a highly invasive, tropical understory shrub that was discovered in north Queensland in 2001. It was an eradication target species at a single location until the discovery of a second infestation in July 2015. The eradication program mostly involved manually uprooting entire plants; however the discovery of the second infestation signalled a need for more control options to accompany changes in managing this weed by a broader range of stakeholders. The second infestation provided sufficient plants to test eight high-volume foliar herbicides at one or two rates. Three of these herbicides were also applied using a low-volume foliar spraying technique, and comparisons were made of the effectiveness, volume and amounts of active ingredients applied using high and low-volume methods. Herbicide damage was assessed one, three and seven months after treatment. High and low-volume rates of treatments containing 600 g L−1 of triclopyr, 333 g L−1 fluroxypyr, and 300 g L−1 triclopyr + 8 g L−1 aminopyralid + 100 g L−1 picloram were effective. Treatments with 600 g kg−1 metsulfuron-methyl, 300 g kg−1 metsulfuron-methyl + 375 g kg−1 of aminopyralid and 140 g L−1 fluroxypyr +10 g L−1 aminopyralid was also effective at both high volume rates tested. Treatment with 625 g L−1 of 2,4-D amine was less effective, and results for treatments with 360 g L−1 of glyphosate were more variable, than the preceding treatments. This trial identified several effective active ingredients to assist in managing a broader C. hirta incursion.

Item Type:Conference or Workshop Item (Paper)
Business groups:Biosecurity Queensland
Keywords:Rainforest, low-volume application
Subjects:Science > Invasive Species > Plants > Effect of herbicides
Science > Invasive Species > Plants > Integrated weed control
Plant pests and diseases
Live Archive:19 Jan 2017 01:54
Last Modified:28 Mar 2022 03:01

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