Have a 15 acre lake that Is being over taken by lily pads. Anyone have any suggestions on what's the best way to kill them and keep them from coming back?

Get in touch with these guys. Aggie owned and operated. They do great work.

http://www.lochowranch.com/services/vegetation-control-and-management/

Paging mneisch

rotenone

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rotenone

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Bad advice...the OP wants to eliminate lily pads, not his fish.

A common glyphosate (Roundup) spray should work on lily pads, w/o harming the aquatic life. Might need a surfactant to ensure the spray stays on the leaves. May have a nasty mess when the lily pads die, so raking may be helpful/needed.

Lily control

Roundup is not an approved aquatic herbicide. Aquaneat is one, don't know much about it though.

Mneisch is honestly someone that I know will be able to provide a good answer.

I did this once with an herbicide labeled for lily pads. It was a long time ago so I bet that herbicide is no longer around.

As someone posted, I did get a mess to clean up. The lily pads died, and released from the bottom, and were floating all over the pond. And they began rotting.

I cleaned up the dead lily pads about once a week. Not too long after that, new lily pads emerged. I realized that I would have to keep to a schedule in order to control the plants that were not yet at the surface.

I gave up and gave the lily pads the win. Someday I will dredge the pond to get it deeper so I will have at least some deep areas where lily pads cannot grow.

I know rather be fishing and assume his rotenone comment was in jest.

Check out the below link. Aquaplant is a fantastic Ag Extension maintained resource for these kinds of questions.

Aquaplant - Lily Pad Control

I just remembered, it was Karmex, which is Diuron.

I gave up because I just did not like the idea of continually having to re-apply a chemical into the pond. It is labeled for it, and is considered safe by the regulatory folks, but I just did not like the idea.

Taking a wildlife habitat management class, call it '97, we were talking about add diversity to large ponds by offering various water depths. The issue came up about how that could be difficult if you didn't have the ability to easily draw down the water. The solution, "a trash bag, fertilizer, fuel oil, and a blasting cap....and get out of the area".....yeah, I'm not advocating for that idea, but long term you might look at making some deeper areas.

The guys over at Total Lake Management did a fantastic job on my pond. Matt Ward was very thorough in explaining what needed to be done to get rid of some aquatic plants that I didn't want. Overall great experience working with these guys!

Very interesting. It would be a lot cheaper than hiring a steamshovel.

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Roundup is not an approved aquatic herbicide. Aquaneat is one, don't know much about it though.

Mneisch is honestly someone that I know will be able to provide a good answer.

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Aquaneat's only active ingredient is glyphosate (ala basic Roundup and its generic equivalents). The diligence is to make the correct application rate.

I like reading labels milk cartons, herbicides, pesticides, cereal boxes....

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Roundup is not an approved aquatic herbicide. Aquaneat is one, don't know much about it though.

Mneisch is honestly someone that I know will be able to provide a good answer.

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Aquaneat's only active ingredient is glyphosate (ala basic Roundup and its generic equivalents). The diligence is to make the correct application rate.

I like reading labels milk cartons, herbicides, pesticides, cereal boxes....

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I won't argue that they aren't pretty much synonymous, but I wouldn't want to get caught using a non-aquatic herbicide in the water. Chances are low, but still...

^^^^^^^^^^^^^^
This is my point.

Regardless of the fact that they are the same chemical. It's what is on the label and your use that matters.

I don't know what kind "law" it is but it is illegal to use Roundup in an aquatic setting. Whether it works or has the same active ingredient as brand XYZ is not the point I was making.

Not trying to be argumentative or rude, but more so protect someone who is ignorant of the fact that it can get them in trouble.

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I don't know what kind "law" it is but it is illegal to use Roundup in an aquatic setting. Whether it works or has the same active ingredient as brand XYZ is not the point I was making.

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FIFRA, NPDES and/or CWA.

Rodeo is glyphosate labeled for aquatics. If it's in the budget, use a herbicide called Sonar.

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Roundup is not an approved aquatic herbicide. Aquaneat is one, don't know much about it though.

Mneisch is honestly someone that I know will be able to provide a good answer.

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Aquaneat's only active ingredient is glyphosate (ala basic Roundup and its generic equivalents). The diligence is to make the correct application rate.

I like reading labels milk cartons, herbicides, pesticides, cereal boxes....

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I won't argue that they aren't pretty much synonymous, but I wouldn't want to get caught using a non-aquatic herbicide in the water. Chances are low, but still...

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I guess it depends on the Roundup used...
Roundup Custom

"Anywhere weeds and water meet, there's a strong chance that vegetation management problems will grow. And anyone who manages brush in wetland areas knows that when left unchecked, vegetation can create hard-to-resolve problems. Roundup Custom herbicide gives applicators maximum use flexibility for both aquatic and terrestrial jobs."

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Rodeo is glyphosate labeled for aquatics. If it's in the budget, use a herbicide called Sonar.

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Rodeo, Aquaneat, and RoundUp Custom are all glyphosate labled for aquatic use. They run +/- $40 per gallon. Sonar is over $2000 a gallon. It will also kill every plant in the water and a 3ft ring around the lake. My advise is to use one of the glyphosate products and retreat in a month the plants that didnt die with the first treatment. As always make sure to use an aquatic labled surfactant. Let me know if you need treatment rates.

Its not the OB if someone doesn't mention the overkill/nuclear option

On a side note, treat small areas at a time. As the plants die, they use oxygen and can cause a fish kill if to much dead matter hits the system at once.

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rotenone

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Bad advice...the OP wants to eliminate lily pads, not his fish.

A common glyphosate (Roundup) spray should work on lily pads, w/o harming the aquatic life. Might need a surfactant to ensure the spray stays on the leaves. May have a nasty mess when the lily pads die, so raking may be helpful/needed.

Lily control

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That was sarcasm font.

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That was sarcasm font.

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The Interweb need a viable sarcasm font