Evaluation of the efficiency of capsule herbicide injection for controlling invasive Gleditsia triacanthos L. in a riparian forest
DOI:
https://doi.org/10.31285/AGRO.29.1634Keywords:
applicator lance, glyphosate capsules, Honey locust, imazapyr capsules, riparian forestAbstract
A study conducted in the Department of Florida, Uruguay, assessed the injection technique for controlling the invasive tree species Gleditsia triacanthos L., comparing two herbicides: glyphosate and imazapyr. The study involved 90 randomly selected trees divided into three groups: glyphosate, imazapyr, and a control group. Discoloration, defoliation, and mortality were monitored from late spring 2017 to late spring 2018. Significant differences were observed in all variables at the end of the monitoring period. Trees treated with imazapyr showed a sharp increase in mortality, reaching 61.3% by spring 2018, while glyphosate-treated trees experienced a more gradual increase, with 21.1% mortality. Similarly, defoliation and discoloration were severe (>60%) in imazapyr-treated trees and moderate (26-60%) in glyphosate-treated trees. The lance injection technique showed varying effectiveness based on the herbicide used. Imazapyr demonstrated stronger effects in eliminating G. triacanthos, making it a potential alternative to traditional control methods. The herbicide capsule applicator used in the study minimized environmental impact by reducing agrochemical drift, thanks to its metal coating and gel solution. However, imazapyr can translocate via roots to non-target trees. No adverse effects were observed in untreated trees, and the herbicide doses used were lower compared to other methods like spraying, further reducing environmental harm. This research highlights the potential of imazapyr-based herbicides in managing G. triacanthos while minimizing ecological impact.
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