Chemical Updates

2019 Chemical Treatment Plan

After 6 years of successful treatment, for most of the lake, the sheer volume and acreage of the non native and invasive Milfoil and Curlyleaf Pondweed have been significantly reduced.  After four years of treating Curlyleaf Pondweed, the seed beds have been significantly reduced, and last year we did not treat for it.  While there were a few areas of Curlyleaf that emerged, they were able to be controlled through harvesting early in the season before the seeds have an opportunity to mature and drop.  That is the approach that we again plan to take this year.

We are, however, again planning to apply herbicides to try to keep the Milfoil in check.  Keeping the milfoil under control proves to be a difficult task.  The most problematic area is the South end of the Lake where milfoil has made a huge resurgence; there are thick beds of milfoil covering most of the South End.  Our ability to treat in the South End in the last few years has been very limited, for a number of reasons, one being lack of financial resources to do everything that is needed.  Last year we were not able to treat in the south end at all.  The result of a few years of very limited treatment has been this huge resurgence of milfoil in most of the south end.  This is not just a problem for the South end, but for the whole lake.  Milfoil is spread through fragmentation.  When boats go through these areas the propellers cut the weeds and fragments float to wherever the water carries them.  Since prevailing winds through the summer are generally from the south, all of these fragments float in a northerly direction, throughout the lake.  Just anecdotally, every time I was in the water around my dock last summer, I would see milfoil fragments floating along, always floating from south to north.  I would always try to scoop up as many as I could see, but of course that’s just a fraction of the ones floating by all the time.  And these fragments end up at various locations throughout the lake, wherever the winds carry them, and then regrow in the new areas.  

In planning for the chemical treatments, we are attempting to take a whole lake approach, to better address the remaining problem areas.  It’s really critical to support treatment of the lake where it is needed now to protect the health of the whole lake throughout the waterbody.  It is really important to be vigilant; if we don’t keep it in check, the milfoil will re-root all around the lake again.  Clear today, may not mean clear tomorrow.

Please donate to support the Lake Management program for herbicide treatment.  Funds will be used to employ the most strategic method possible. If everyone contributed to this fund we would have adequate funds.  While donations in any amount will help, we suggest donations of $100, $200, $300 or whatever you can invest in this program will make this a whole lake effort and continue to keep our lake in good shape.  It’s important to do this now as we must coordinate our program well before the growing season begins.  If we are not able to raise enough funds, we will be unable to treat this coming year.  In that instance we will have to carryover funds to the following year to see if adequate funds could then be raised.  In the meantime, more damaging weeds will be spread through the lake.

Please make the choice, donate, and help keep Cossayuna clean of invasive weeds.

An additional area that I want to mention is the huge “explosion” of coontail that occurred last August, and the significant algae blooms.  Coontail is a native plant (so not one that we can treat with chemicals), which can be free floating, not rooted to the bottom.  It is considered a good healthy plant to be present in the lake, but that doesn’t mean that it can’t be a huge nuisance when there’s just so much of it.  It isn’t unusual for it to be abundant by August but last summer was very unusual.  There was just so much coontail, so thick, huge floating clumps of it, the harvester worked hours on end, took out load after load of it, and it would be back just as thick a day or so later.  Don’t really know why it was so bad last year; we had an extremely hot summer last year and a lot of heavy rainstorms in August.  Those could be factors.  In addition to the overabundance of coontail, at the same time, we also had very extensive algae blooms, which started earlier than usual and lasted much longer than what we normally experience.  Cossayuna, of course, wasn’t alone with the algae blooms last year.  Many lakes throughout the region and State were experiencing significant algae blooms.  The very hot weather and the significant rainstorms (which wash nutrients into the lake through runoff) were very likely a significant factor in the algae blooms that were experienced. 

Please donate generously to the Lake Management fund.

THANK YOU!!!

If you have questions, please contact Sheila Rappazzo at sarappazzo@yahoo.com or 518-429-8312 (call or text). 

Please donate to support the Lake Management program for herbicide treatment.  Funds will be used to employ the most strategic method possible. If everyone contributed to this fund we would have adequate funds.  While donations in any amount will help, we suggest donations of $100, $200, $300 or whatever you can invest in this program will make this a whole lake effort and continue to keep our lake in good shape.  It?s important to do this now as we must coordinate our program well before the growing season begins.

Please make the choice, donate, and help keep Cossayuna clean of invasive weeds.

TO DONATE:

Please go to the Forms & Applications page on this website and download the 2018 Participation Form. 

Please record your donation there under LAKE MANAGEMENT PROJECT.

THANKS! Your donation will help Cossayuna Lake continue to recover its health.