Taking this into account, it may be possible to achieve a greater level of control using a higher concentration, especially with no cut applications. The results of this study indicate that giant cane control with glyphosate herbicides is best achieved in conjunction with stem cutting. Acceptance of these results, however, needs to be tempered by several important factors including the influence of herbicide application rates and herbicide application timing relative to giant cane flowering. Perhaps the most important observation gained from this study is the influence of canopy and foliar characteristics on herbicide deposition and uptake. Because the scope of this study did not extend past 360 DAT observations, it would be unwise to interpret the results as advocating single herbicide applications without follow-up.
Giant cane is a difficult species to control.
Additionally, it is important to acknowledge that the decision to select one control method over another is often influenced by site specific conditions. For example, aerial application may not be suitable due to the proximity of trees, powerlines or high-use roads. Conversely, projects that involve stem-cutting, may not be time or cost efficient for large giant cane stands. Literature Cited Bell, G.P. 1997. Ecology and management of Arundo donax and approaches to riparian habitat restoration in southern California.