WEED REPORT
June 2008
Friday 30 May, 2008
Subject: Weed Spray
Following spray dates for lake.
Crystal Bay & Cove - May 6th Fluridone (SONAR) Poison entire areas
May 13th Samples of Water at Crystal Bay/Cove (FAST TEST)
May 20th started treating lake for Curly Leaf Pond Weed & Eurasian Mil Foil approximately
60 acres. Water temperature approximately 61 degrees. We needed warmer water for spraying.
May 20th first opportunity for spraying Curly Leaf.
May 20th -Gave Crystal Bay & Cove a Bump. Increased Sonar to raise chemical in Bays to 6
PPB
May 27th samples of Water at Crystal Bay & Cove
May 28th started our 2nd round of spraying for Curly Leaf. Had 2 boats on lake for 7
hours. Mil Foil at this time is growing fast. Have elected to treat Mil Foil areas June
3rd or 4th. Different chemical for Mil Foil than Curly Leaf. Want lake to look great by
the 4th weed end. We will also spray for Algae around the lake. We have a few areas that
we will touch up for curly weed.
It would appear that we will need to treat Hamilton Lake next year with Fluridone (Sonar)
to eliminate most of our problems this year with weed control.
We are back to spending $$$$$$ for next years treatment. If anyone has questions or
concerns I will take phone calls from lake residents who have a problem area. CELL
630-881-2117 CELL.
Bill Martins- HLA
June, 2006
The Hamilton Lake Association has a message for ALL PAYING MEMBERS of the Lake Association. The ENTIRE lake has
been treated with a chemical called SONAR. This treatment is not the same type of treatment that most of you
are familiar with. This type of chemical is “NOT” applied the same way as the old 2-4-D herbicide used in the
past! It is not applied to just the shoreline area of the lake!
The vast majority of this treatment is applied to the large Eurasian watermilfoil beds and also follows the
hydraulic water flow of the lake. This keeps the chemical in the lake longer and does a much better over all
aquatic plant treatment. Most of the shoreline is not treated. The way this treatment works has to do with the
natural water flow of the lake and again, this is not a shoreline treatment. The applicator’s airboat will not
be in front of your house as in years past. You still will have the full effect of the chemical at your dock.
This program takes about 4 weeks to work. The best way you can help this program work is to stay away from
any and all weeds. Every time you cut the milfoil weeds up with your propeller the weed drops and re-seeds
itself making the weed problem worse.
The reason the weeds are so bad this spring is because we had very little ice cover on the lake this past
winter. We only had about two weeks of ice cover this past winter, normally we have about three months of ice
cover. Also we had a full nine days of rain in the first part of May this let a lot of nutrients into the lake
and also set the application back about two weeks on the SONAR treatment program. Please be patient the weeds
will drop.
More information:
The single most important thing every homeowner can do to help control weeds in the lake is to use
a phosphorus-free fertilizer. When shopping for lawn fertilizer, look for the three numbers on the lawn
fertilizer bag. The middle number indicates the phosphorus content of the fertilizer, so look for a 0 as the
middle number (example 20-0-20). If you don't see the product, ask the manager to order it for you.
The Indiana Association of Soil and Water Conservation Districts
has more information on this subject.

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