Control methods for ochna (Ochna serrulata) (Hochst.) Walp. in south-east Queensland
Rebecca Breaden and Trevor Armstrong, Department of Natural Resources and Mines, Alan Fletcher Research Station, PO Box 36, Sherwood, Queensland 4075, Australia.
Summary
We investigated potential chemical and mechanical methods for controlling the environmental weed, Ochna serrulata (Hochst.) Walp., using an unreplicated screening trial in Brisbane, Queensland. The 18 treatments tested included: foliar spray, cut stump, basal bark and splatter gun applications of glyphosate (Glyphosate® 360), fluroxypyr (Starane® 200), metsulfuron-methyl (Brush-Off®), triclopyr (Garlon® 600) and dicamba (Kamba® 500), as well as hand pulling seedlings and digging out adult crowns.
The most effective herbicide tested was fluroxypyr. All treatments containing fluroxypyr were effective in killing ochna, between 10 and 18 months after application. The two mechanical treatments (removal of seedlings and adult crowns) were also very effective. However these were time consuming and would only be appropriate for scattered plants or light infestations.
Plant Protection Quarterly (2004) 19 (1) 33-35.