Marc Bellaud from Aquatic Control
Technology explained the second treatment as follows:
Little Mishnock was re-treated
with Renovate OTF herbicide on September 27th. Little Mishnock was treated with the same product on May 21st.
Initially the cove responded well to treatment. Approximately 1-month following treatment all of the targeted milfoil
was severely stressed and it looked like the plants would continue to die-off. Instead the milfoil plants began to recover
and grow aggressively. This was noted when we inspected the cove with a Technical Specialist from SePRO Corp. the manufacturer
of Renovate OTF herbicide. It was apparent that a sublethal concentration had been applied. Because SePRO had
recommended the concentration that we used for the May 21st treatment, they agreed to provide additional material so we could
re-treat the entire cove with a higher concentration. After checking with several researchers, it was determined that
the milfoil plants would be most susceptible to re-treatment now, as they were just starting to regrow. We hope that
this re-treatment will provide a more complete kill of the milfoil plant and root structures and provide carryover control
through the 2008 season. We plan to inspect the lake in about a month to evaluate how effectively the treatment is working.
The re-treatment was performed at no additional cost to LMPA.
