North Carolina fights giant salvinia invasion at Gatway Swamp with herbicide treatments

Columbus County officials are making significant strides in combating the invasive aquatic plant, giant salvinia, which has been wreaking havoc in local waterways. During a recent government meeting, the focus was on the ongoing efforts to manage this troublesome species, which is illegal to import or sell in North Carolina due to its detrimental effects on the environment, recreation, and agriculture.

Giant salvinia, a small but aggressive plant, has infested over 200 acres in the Gatway Swamp area near Cherry Grove. The county, in partnership with the North Carolina Department of Environmental Quality and the Army Corps of Engineers, has been actively working on a treatment plan since 2021. The project aims to prevent the spread of giant salvinia into the Lumber River, which could have catastrophic consequences for local ecosystems.

The treatment process involves applying herbicides to targeted areas, with a focus on Richardson Pond and Buffkin Pond. Officials reported that the project has shown promising results, with visible improvements in water clarity and a reduction in the plant's coverage. The team has been using both liquid and granular herbicides to effectively manage the salvinia, adapting their methods based on the specific conditions of each pond.

As the project progresses, officials anticipate a decrease in treatment costs over the next few years, potentially reducing the budget from $150,000 this year to around $40,000 in subsequent years. This reduction is expected as the infestation is brought under control, allowing for more efficient management of the remaining areas.

The meeting also highlighted the importance of community involvement, with local residents providing valuable insights and assistance in identifying infested sites. As the county continues its efforts, the hope is to restore the natural balance of the waterways and enhance recreational opportunities for residents.

In conclusion, Columbus County's proactive approach to managing giant salvinia not only addresses an immediate environmental concern but also reflects a commitment to preserving local ecosystems for future generations. The ongoing treatment efforts are a testament to the collaborative spirit of the community and government agencies working together for a healthier environment.