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Why can’t I treat my pond with the common weed killer I use around my yard? | Ponds & Lakes Q&A

Why can’t I treat my pond with the common weed killer I use around my yard?

Q: Why can’t I treat my pond with the common weed killer I use around my yard?

Duane – Spring Grove, PA

A: It may seem like a convenience and a cost savings to use your terrestrial weed herbicides to treat weeds in your pond or lake. But when it comes to managing nuisance growth in and around your pond, not all chemicals are created equally.

Though broad-spectrum-use herbicides like diuron work great on grassy terrestrial weeds, they’re not approved for use on cattails and water milfoil because of the direct contact with public waterways or possibility of leaching into drinking/ground water. Instead, you need to use products that are registered by the Environmental Protection Agency for aquatic use, like Pond Logic® Algae Defense®, PondWeed Defense® and Avocet® PLX aquatic herbicides.

Why the regulations? Read on for details.

Environmental Protection

The EPA registers products like herbicides for aquatic use to protect the environment. Its goal is to minimize harm while maximizing results.

The government agency tests the ingredients’ concentration, frequency of use and effectiveness for their short-term and long-term effects in their intended environment. It also checks the chemicals’ half life, which is how long the substances remain in the environment before breaking down enough to be considered non-toxic.

Safer for Your Pond Visitors

If you use unapproved chemicals in your pond or lake, you could be doing harm to not only the ecosystem but also to your fish, your livestock and wildlife, your soil and, most importantly, to yourself, your family and your neighbors.

Herbicides that have been approved by the EPA include specific restrictions and precautions on their labels about consuming fish after treating bodies of water. They caution against swimming in or drinking from treated ponds within a certain amount of time after application. They even warn of soil contamination issues that landowners or pond professionals should be aware of.

Chemicals that are not approved for aquatic use have none of these warnings because they have not been tested for their effects on the pond habitat. In fact, some products can actually be considered a contaminant to the aquatic environment – and you don’t want that, right?

Obey the EPA

Even if you don’t consume your game fish, swim in your lake or drink the water, you should steer clear of unapproved chemicals. Some of them can leach into the soil surrounding the pond or be released during heavy rains when ponds flood. That runoff – including the potentially toxic chemicals – can then be released into the public waterways or wetlands used by neighbors.

Play it safe. Obey the EPA.

Pond Talk: What do you think of the EPA’s regulation of aquatic herbicides?

Pond Logic PondWeed Defense - Eliminate Aquatic Weeds

How Do I Get Rid Of Phragmites? | Ponds & Lakes Q&A

How Do I Get Rid Of Phragmites?

Robert – Steamboat Springs, CO

Phragmites, also known as common reeds, are wetland grasses that can grow up to 15 feet in height. They quickly become a nuisance because they form dense patches that choke out native plant and wildlife species, block shoreline views, and reduce access for swimming and fishing.

Completely eliminating phragmites takes several treatments. The majority of the plant is an extensive underground root system that is very difficult to fully eliminate. You can control the density and spread of phragmites with regular chemical treatments applied with a pressurized pond sprayer. Consider using an herbicide such as Kraken, which carries no restrictions on recreational use or livestock consumption of water from the treatment area.

Once phragmites have died, you should cut or burn the dead vegetation. The best time to treat phragmites is the summer when the plant is actively growing and seeding.

Will Algaecides & Herbicides Harm My Beneficial Bacteria? | Ponds & Lakes Q&A

Will Algaecides & Herbicides Harm My Beneficial Bacteria?

Kenneth – Lawton, OK

Some chemical treatments can affect the performance of your beneficial bacteria. It’s best to wait 72 hours after a chemical treatment to add bacteria. Certain chemical treatments contain copper, and copper can reduce the effectiveness of bacteria. If you wait a few days, you’ll ensure no loss of bacteria from a chemical interaction and the bacteria will have a lot of newly killed weeds to feed on. If you can’t wait, apply bacteria away from the treated areas of your pond. For example, if you put chemicals around the edge of your pond, add bacteria such Pond Logic® PondClear™, to the center. This will prevent the chance of overlapping chemicals with natural bacteria.

I have phragmites in my pond, and they are so aggressive they even outgrow the cattails. What should I do? | Pond & Lakes Q&A

I have phragmites in my pond, and they are so aggressive they even outgrow the cattails. What should I do?

I have phragmites in my pond, and they are so aggressive they even outgrow the cattails. What should I do?
Kandy – Portland, OR

Phragmites are the worst kind of uninvited guest: once it makes its appearance, it’s too late to give it the slip. For those who have experienced phragmites, they’ll attest to its tenacity. They’ll also attest to its heartiness. Unlike the plants you’re actually trying to grow in your pond, phragmites requires no care and feeding at all – and it’s remarkably adept at withstanding any effort to slow it down. .

Characterized by a green stalk with purple/tan plumes in late July, the majority of each phragmites plant is underground. As a result, by the time you actually see a phragmites plant in your pond, its root system is well established – laying the groundwork to take over the entire body of water. In fact, phragmites plants continue to spread throughout their life, sending stalks skyward at a blistering pace. And once the stalks reach maturity – typically from early to late summer – the plants double their efforts at pond domination by distributing seeds throughout the watershed. Phragmites, it seems, is quite capable at taking care of itself.

When taken alone, phragmites might actually be considered attractive. Unfortunately, it has no interest in sharing its turf. Through its aggressive growth, phragmites chokes out native plant species in short order, and can transform an entire pond’s flora over the course of a single season. And while it’s nearly impossible to eliminate phragmites once it’s established, our Kraken Aquatic Herbicide and Cide-Kick Combo – carefully and regularly applied with our Airmax Specialty Pressurized Pond Chemical Tank-Sprayer or our 4-Gallon Backpack Pond Sprayer – can significantly impair root system growth, while leaving room for the plants you’d like to keep around.

After herbicides are applied, many pond owners are eager to eliminate both existing growth and dead stalks left over from the previous season. Our Aquatic Weed Cutter makes short work of offending plants. Once the cutting is done, our Aquatic Weed Rake helps to remove mess. In some instances, pond users also use controlled burns – after herbicide application – to remove standing plants. While this can be effective, it should never be practiced apart from herbicide use. Some evidence suggests that burning alone – without the use of herbicides – can actually increase the density of phragmites plants.

Good luck with your battle against phragmites. Stay vigilant, stay focused, and act quickly to curb new growth. The fight may last a long time – but the results will be worth the effort.

Pond Talk: Have you battled phragmites in your pond?

Kraken and Cide-Kick Combo

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