Updated: February 7, 2023

Clematis plants are a popular choice for gardeners due to their beautiful and vibrant blooms. However, one of the biggest problems that clematis growers face is borers. These pests can cause significant damage to the plant, leading to stunted growth or even death. In this article, we will discuss how to identify and get rid of borers on clematis plants.

Identifying Borers on Clematis Plants

The first step in getting rid of borers is to identify them. There are two types of borers that usually attack clematis plants: the stem borer and the root borer.

Stem Borers

Stem borers are tiny larvae that feed on the inside of the stems, causing them to wilt and eventually die. You can identify stem borers by looking for small holes in the stem or noticing a sticky substance coming out of the stem where it meets the soil. The presence of sawdust-like material around the base of the plant may also indicate a stem borer infestation.

Root Borers

Root borers are larger than stem borers and feed on the roots of clematis plants. They can cause significant damage to the root system, leading to stunted growth or death of the plant. You can identify root borers by looking for chewed or damaged roots and yellowing leaves.

Getting Rid of Borers on Clematis Plants

Once you have identified that your clematis plant has borers, there are several steps you can take to get rid of them.

1. Prune Infested Stems

The first step in getting rid of stem borers is to prune infested stems. Use a pair of clean, sharp pruning shears to cut off any wilted or damaged stems just below the affected area. Make sure to dispose of the infested stems in a sealed plastic bag to prevent the borers from spreading to other plants.

2. Apply Insecticides

Insecticides can be effective in getting rid of both stem and root borers. Look for insecticides that contain imidacloprid or dinotefuran as active ingredients. Follow the instructions on the label carefully, and apply the insecticide to the soil around the base of the plant. You may need to repeat the application after a few weeks to ensure that all the borers are gone.

3. Use Beneficial Nematodes

Beneficial nematodes are tiny, parasitic worms that feed on borers and other pests. You can purchase nematodes from a garden center or online. Follow the instructions on the package carefully, and apply the nematodes to the soil around the base of the plant.

4. Keep Your Plant Healthy

Keeping your clematis plant healthy is one of the best ways to prevent borers from infesting it in the first place. Make sure to water your plant regularly, fertilize it with a balanced fertilizer, and prune it regularly to promote good air circulation.

FAQ

Can I prevent borers from attacking my clematis plant?

Yes. Keeping your plant healthy is one of the best ways to prevent borers from attacking it. Make sure to water your plant regularly, fertilize it with a balanced fertilizer, and prune it regularly to promote good air circulation.

How do I know if my clematis plant has borers?

You can identify borers by looking for small holes in the stem, noticing a sticky substance coming out of the stem where it meets the soil, or seeing sawdust-like material around the base of the plant.

What insecticides can I use to get rid of borers?

Look for insecticides that contain imidacloprid or dinotefuran as active ingredients.

Can I use beneficial nematodes to get rid of borers?

Yes. Beneficial nematodes are tiny, parasitic worms that feed on borers and other pests. You can purchase nematodes from a garden center or online.

Can I prune my clematis plant if it has borers?

Yes. Prune infested stems using a pair of clean, sharp pruning shears to cut off any wilted or damaged stems just below the affected area. Make sure to dispose of the infested stems in a sealed plastic bag to prevent the borers from spreading to other plants.