The Adirondack Park Agency (APA) is using an aquatic herbicide at two points along Lake George in New York State. At both sites, the problem is growth of Eurasian Watermilfoil, an invasive plant species that grows quickly in water bodies it’s tracked into.
The APA conducted monitoring and said the herbicide eliminated all traces of Eurasian Watermilfoil and found no significant impact on other plants, or degradation in wetlands. However, not every group tasked with caring for Lake George or the Adirondacks is convinced about ProcellaCOR EC yet. There isn’t enough long-term evidence of the herbicide’s safety. Some factors have to be measured over a lot of time.
In some cases, other states have made their own observations about the effectiveness of ProcellaCOR EC and the drawbacks that could manifest. From a document on the herbicide’s use by the Wisconsin Department of Natural Resources:
“It is important to note that repeated use of herbicides with the same mode of action can lead to herbicide-resistant plants, even in aquatic plants. Certain hybrid Eurasian watermilfoil genotypes have been documented to have reduced sensitivity to aquatic herbicides. In order to reduce the risk of developing resistant genotypes, avoid using the same type of herbicides year after year, and utilize effective, integrated pest management strategies as part of any long-term control program.”