Invasive Plants

Invasive plants are plant species that are not native to a specific location, and that have a tendency to spread to a degree believed to cause damage to the environment, human economy or human health. Wikipedia Definition of Invasive Species.

Invasive plants are not from around here. They are from Europe, China, or East Asia. These plants are not adapted to our country, area, and eco-system.

Invasive Plants (Examples)

  • Buckthorn

  • Multiflora Rose

  • Honey Suckle

  • Japanese Barberry

  • Japanese knotweed

  • Spotted knapweed

How to get rid of, manage, and control invasive plants.

Invasive plants can be managed by forestry mowing and herbicide application.

What is herbicide application?

Herbicide application is an effective tool to manage invasive plants. If applied correctly it will suppress these unwanted invasive plants and not directly disturb soil structure.

Herbicide Application. How to get rid of invasive plants.

Herbicide Re-sprout Treatments

Herbicide application is followed by herbicide re-sprout treatments. Because after forestry mowing invasive plants re-sprout. And if left untreated these invasive plants will continue to suppress the regeneration of native plants. 

Foliar Herbicide

Foliar application of herbicide, or foliar herbicide for short, will kill the re-sprouts of these invasive plants. You have to give the invasive plants a little time to re-sprout so you can kill them with herbicide.

There are many different types of herbicides depending on the re-sprout. We can identify all invasive plants, and provide you with a management plan to stop the plants from re-sprouting. And to do so we will first assess the land and then provide a treatment plan for it. We can also work with your local forester or county agent.

Herbicide Application. How to get rid of invasive plants.

Wherever Needed

We apply herbicide wherever it is needed and whatever needs to be treated, on the farm or in the forest, on private or public land, on the prairie or savannah.

Herbicide Application in the Forest

First you mow everything down through forestry mowing. Then you apply the herbicide. Let’s take buckthorn as an example. You mulch it down to grade in the winter. Then this spring this buckthorn is starting to come back. There will be all these little shoots coming out of the crown of the plant. They will start growing out of the stump exactly where I stopped grinding. And that is common for almost any plant.

The forestry mower doesn’t kill anything. You get it down to grade to where you can get in with a UTV (Utility Task Vehicle) and spray it.

Unfortunately there will be some collateral damage. We may kill some of the native species as well. That is why you need to leave as many good native trees as you can so there is always seed for the future. When we are done, your woods may look a little like a park. But I can guarantee that this will only be for a little while. Slowly and naturally the good native seeds which are left in the seed-bank will start to come up out of the soil.

In a forest we do a lot more than buckthorn removal alone.

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Herbicide Application in the Prairie

In a prairie grow all kinds of grasses and flowers. But if Japanese knotweed or spotted knapweed grows in your prairie you may have a problem. Because these plants are allelopathic.

They produce a chemical that kills off everything around it in a way that only its own plants and seeds grow and spread. It creates a big patch of its own kind much like a virus does.

Herbicide Application for Spotted Knapweed

Spotted Knapweed

A prairie with spotted knapweed needs to be treated with a specific herbicide. Treating a prairie with herbicide therefore is a different process and requires a different chemical than treating a forest after mowing it.

Herbicide Application in the Forest

Hundreds of invasive plant species grow in a prairie. We can’t narrow down what species we treat with herbicide to just a few. If we focus on spotted knapweed only, we would overlook the burdock, thistle, Queen Anne’s lace, and a whole list of other invasive non-native and native species that may grow there.

Herbicide Application for Japanese Knotweed

List of Invasive Plants in Wisconsin

For a complete list of invasive plants in Wisconsin.

And buckthorn can grow anywhere. That includes your prairie.

Some people don’t want even certain native trees to grow in a prairie. That is when prairie becomes a novelty item. In a prairie you try to make time stand still. You do not want your prairie to go through the natural progression of turning into a forest. You try to control it so it stays the way you want it to look.

Cut Stump Treatment

Instead of using a skid steer; you cut off the unwanted trees with a chainsaw. Then you put herbicide on the stump and let it soak down in the root to kill the plant.

Cut stump herbicide treatment is a simple way to control woody invasive plants. A herbicide solution is applied directly to the stump top immediately after cutting down the plant. The herbicide kills the stump and prevents new growth that would normally occur after cutting alone.

Cut Stump Treatment

Basal Bark Treatment. Cut Stump Treatment.

Basal Bark Treatment

Alternatively you take the herbicide and mix it with a dilutant such as diesel fuel or bark oil. The herbicide solution gets put on the bark, usually at the basal area right above the crown or base of the plant. The herbicide is applied in a full ring, usually one inch for every inch of DBH. If your tree is 8 inches around, you need an 8 inch ring around your plant to get enough herbicide in it to kill it.

This last method is called basal barking or basal bark herbicide treatment. Basal barking is done without cutting the tree down first. There is always an alternative way to do things.

Basal bark herbicide treatment is a control method in which an oil soluble herbicide is mixed with an oil carrier instead of water and applied directly to the bark of woody plants less than 6 inches in diameter.