curlyleaf pondweed

MAISRC research on curlyleaf pondweed includes analyzing data to determine factors that control curlyleaf distribution and abundance, establishing how many herbicide treatments are needed for control, and finding approaches to establish native plants after control.  Click here to learn more about curlyleaf pondweed and its impacts.

Key findings and accomplishments

  • Conducted research on Lakes Riley and Susan (with Mitchell Lake as a reference lake) that showed that low-dose, early season endothall herbicide treatments successfully controlled curly-leaf pondweed within treatment years without adverse impacts on native plant communities. Curly-leaf pondweed frequency of occurrence, biomass, and turion production all declined by 90% or more in treated lakes

  • Analyzed pre-existing data on curlyleaf pondweed from sixty Minnesota lakes to understand environmental factors affecting curlyleaf pondweed abundance and management outcomes

  • Found that consecutive years of treatment are important for suppressing curlyleaf pondweed, and that less snow and turbid water are closely tied to more abundant populations of curlyleaf pondweed
curlyleaf pondweed

Ongoing research

  • Analyzing how many herbicide treatments are needed for effective control, what time of year to apply, and how broadly the treatments should be applied to produce the best results

  • Researching how environmental conditions influence abundance

  • Evaluating how native plants respond to herbicide treatments

  • Conducting post-treatment monitoring, assessment of alum treatments, and transplanting native plants to treated areas to determine how to best enhance the response of native plants, particularly in lakes with poor water clarity

Curlyleaf pondweed researchers

plants research