Lake Benton, Minn. An effort to use the herbicide fluridone to reduce problems caused by the invasive curly-leaf pondweed without harming native vegetation got under way in April at Lake Benton, a 2,850-acre lake in Lincoln County, according to the Minne

It’s the first time that fluridone has been used in Minnesota to
control the prolific curly-leaf pondweed, which displaces native
plants. The first treatment took place April 11 and another is
scheduled for May. The lake has been infested with curly-leaf
pondweed since the early 1990s.

If this summer’s treatments are effective, they will be repeated
twice each year for the next three to four years. A similar test
treatment is being done on Weaver Lake in Hennepin County this
spring.