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- Title
Chemical Management of Senecio madagascariensis (Fireweed).
- Authors
Wijayabandara, Kusinara; Campbell, Shane; Vitelli, Joseph; Kalaipandian, Sundaravelpandian; Adkins, Steve
- Abstract
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.
- Subjects
QUEENSLAND; HERBICIDES; SOIL seed banks; HERBICIDE application; SENECIO; PASTURE management; PLANT spacing; PYRROLIZIDINES
- Publication
Plants (2223-7747), 2023, Vol 12, Issue 6, p1332
- ISSN
2223-7747
- Publication type
Article
- DOI
10.3390/plants12061332