Herbicide Tests for Control of Brazilian-Pepper and Melaleuca in Florida

摘要

Container-grown Brazilian-pepper and melaleuca seedlings, 1-1/2 and 3-1/2 months old, were treated with eight herbicides at two concentrations in greenhouse screening trials. Root-absorbed herbicides were more effective than those foliar-absorbed, and gave virtually complete control with both species. Herbicides with little residual activity were in-effective. Mature Brazilian-pepper bushes were field-tested with six herbicides and five application techniques. Basal spot treatments with Hyvar and Velpar gave good control. Stem injection of Tordon also gave good control, but was labor-intensive. Stump treatments with silvex, Banvel, and Ammate reduced resprouting from stumps to acceptable levels, but did not adequately prevent root suckers. Foliar sprays of silvex, Banvel, Ammate, and Velpar gave erratic results, and generally were unsuccessful.