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Controlling Sago Pondweed – Pond & Lake Q & A

Picture of Sago Pondweed

Q: Sago Pondweed is taking over our pond! What can I do to get rid of it? - Sue of DePere, WI

A: We are hearing more and more customers having an issue with pondweeds that are taking over their ponds. One we hear a lot about so far this year is Sago Pondweed. The Texas AgriLife Extension Service describes Sago Pondweed as:

“[...] a perennial plant that arises from thickly matted rhizomes and has no floating leaves. The stems are thin, long and highly branching with leaves very thin and filament-like, about 1/16 of an inch wide and 2 to over 12 inches long tapering to a point. The leaves grow in thick layers and originate from a sheath. The fruit is nut-like 1/8 to 1/4 inches long and 1/10 to 1/8 inches wide.”

There are a couple ways to treat Sago Pondweed. These solutions will not only treat Sago Pondweed but also a majority of other pondweeds as well.

For spot treatments, the best product to use is Pondweed Defense. Its fast acting and works very well. One gallon of Pondweed Defense will treat up to 5,000 square feet of Sago PondWeed.

If Sago Pondweed is getting out of control, then the best product to use is WhiteCap. WhiteCap is a long-term solution and will treat the whole body of water. One 8 oz bottle will treat up to a 1/4 acre pond with an average depth of 4′.

After the Sago Pondweed has died off, it is very important to rake it out. If the dead vegetation stays on the bottom of the pond, over time it will break down into “muck” and create more food source for other algae and
pondweeds. The Easy to Use Pond & Beach Rake is a great tool to accomplish this.

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