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Chemical Management of Senecio madagascariensis (Fireweed)

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Wijayabandara, K., Campbell, S., Vitelli, J. S., Kalaipandian, S. and Adkins, S. (2023) Chemical Management of Senecio madagascariensis (Fireweed). Plants, 12 (6). p. 1332. ISSN 2223-7747


Article Link: https://doi.org/10.3390/plants12061332

Publisher URL: https://www.mdpi.com/2223-7747/12/6/1332


Fireweed (Senecio madagascariensis Poir.) is a herbaceous weed-producing pyrrolizidine alkaloid that is poisonous to livestock. To investigate the efficacy of chemical management on fireweed and its soil seed bank density, a field experiment was conducted in Beechmont, Queensland, in 2018 within a pasture community. A total of four herbicides (bromoxynil, fluroxypyr/aminopyralid, metsulfuron-methyl and triclopyr/picloram/aminopyralid) were applied either singularly or repeated after 3 months to a mix-aged population of fireweed. The initial fireweed plant density at the field site was high (10 to 18 plants m−2). However, after the first herbicide application, the fireweed plant density declined significantly (to ca. 0 to 4 plants m−2), with further reductions following the second treatment. Prior to herbicide application, fireweed seeds in both the upper (0 to 2 cm) and lower (2 to 10 cm) soil seed bank layers averaged 8804 and 3593 seeds m−2, respectively. Post-herbicide application, the seed density was significantly reduced in both the upper (970 seeds m−2) and lower (689 seeds m−2) seed bank layers. Based on the prevailing environmental conditions and nil grazing strategy of the current study, a single application of either fluroxypyr/aminopyralid, metsulfuron-methyl or triclopyr/picloram/aminopyralid would be sufficient to achieve effective control, whilst a second follow-up application is required with bromoxynil.

Item Type:Article
Corporate Creators:Department of Agriculture and Fisheries, Queensland
Business groups:Biosecurity Queensland
Keywords:herbicides; plant density; seed bank; fireweed; management
Subjects:Science > Invasive Species > Plants > Effect of herbicides
Agriculture > Agriculture (General) > Agricultural chemistry. Agricultural chemicals
Plant pests and diseases > Weeds, parasitic plants etc
Live Archive:06 Jul 2023 03:15
Last Modified:06 Jul 2023 03:15

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