Milfoil Treatment Update – August 2012

After learning of the additional requirements imposed on our planned herbicide treatment of the milfoil near the mouth of Middle Brook, we elected to use hand pulling and possibly bottom barriers this year.  It was our hope that we could clear the other locations in the lake and then treat that dense patch with triclopyr early next summer. LINK

We have contracted with Lycott, Inc., to provide a dive team to hand pull the E. milfoil plants that are not part of that dense patch.  They have visited the lake twice this summer, and plan to return one more time.  After each visit they provided us with a detailed summary of the number of milfoil plants they removed and their locations.  In the maps below the fifteen sites where milfoil had been identified during the May survey are labeled.

On their first visit, June 14th and 15th, they cleared all of the sites except site 14, which is the dense 8+ acre patch near the mouth of Middle Brook shown in the map inset.  In all, they pulled 2787 plants.  Their second visit was July 20th and 21st.  This time they were not able to clear all of the outlying areas.  The number of plants had increased significantly during the intervening five weeks.  They removed a total of 5159 plants from the fourteen sites this time.  Even so, they were unable to completely clear sites 5 and 13 due to time constraints.

The numbers in the circles indicate plants collected each visit.  The letter C preceeding the number indicates that the area was completely cleared. Where there is an R, it means that the number of plants were removed, with other plants remaining.  The third and final visit by the divers is planned for early September.

June 14-15. Click above for larger image.


July 20-21. Click above for larger image.

We are pleased by the quality of work done by Lycott’s divers.  The detailed reporting is certainly refreshing, giving a count of individual plants removed.  For earlier years we have quantities measured in cubic yards and bushels.  Figuring a conversion factor is something we have yet to accomplish.