Review of 2013 Herbicide Treatment

Based on the recommendation of Lycott, Inc., and with the concurrence of State scientists this year we treated approximately 35 acres of the lake with Renovate OTF.  We were able to devise a strategy that accommodated the rare proserpinaca palustris growing near the mouth of Middle Brook.  The application was delayed by equipment malfunction, but a plan was quickly developed which allowed the procedure to progress the next day.  We are grateful to the State, and particularly to Matthew Probasco, for being flexible under difficult circumstances in the field.  Details of the treatment, including locations, concentrations, and problems are covered thoroughly in in Lycott’s “Final Report for Year Four of Myriophyllum spicatum Management” which has been separately submitted to DEC.

The treatment was not as successful as we had hoped.  Our only other experience with triclopyr in the lake (2010) was a resounding success.  Then nearly all of the E. milfoil growing in the lake was soon decaying on the bottom.  In 2013 only the treated areas along the northwestern shore remained milfoil free at the end of the summer.  Most of the rest of the perimeter of the lake showed growth in the September survey.  In particular, the bed at the mouth of Middle Brook that was a primary focus of our efforts, was growing robustly.