Updated: April 30, 2022

Dianthus is a beautiful flowering plant that is widely grown in gardens and landscapes. However, like all plants, it is vulnerable to pests and diseases. One of the most common problems faced by dianthus growers is the infestation of borers. Borers are insects that tunnel into the stems and roots of plants, causing damage and weakening the plant. If left untreated, borers can kill your dianthus plant. In this article, we will discuss how to get rid of borers on dianthus plants.

Identify the Signs of Borer Infestation

The first step in getting rid of borers is to identify the signs of infestation. Here are some signs to look out for:

  • Wilting or yellowing leaves
  • Stunted growth
  • Holes or tunnels in stems or roots
  • Sawdust-like material (frass) around the base of the plant

If you notice any of these signs, your dianthus plant may be infested with borers.

Remove Infected Plant Parts

The next step is to remove any infected plant parts. Use pruning shears to cut off any wilting or yellowing leaves, as well as stems that show signs of damage or tunneling. Be sure to dispose of the infected parts away from your garden or landscape.

Apply Insecticide

Once you have removed the infected plant parts, it’s time to apply insecticide. There are several insecticides available in the market that are effective against borers. Look for insecticides that contain imidacloprid or carbaryl as active ingredients.

Follow the instructions on the label carefully while applying insecticide. Be sure to spray all parts of the plant, including leaves, stems, and roots. Repeat the application after two weeks to ensure all the borers are eliminated.

Encourage Plant Health

The best way to prevent borer infestation is to encourage the health of your dianthus plant. Healthy plants are less susceptible to pests and diseases. Here are some tips to keep your dianthus plant healthy:

  • Water your plant regularly, but avoid overwatering
  • Fertilize your plant with a balanced fertilizer every four weeks
  • Prune your plant regularly to remove dead or diseased parts
  • Keep your garden or landscape clean and tidy


Can borers be prevented?

Yes, you can prevent borer infestation by encouraging the health of your dianthus plant. Follow the tips mentioned above, including regular watering, fertilizing, pruning, and maintaining a clean garden or landscape.

What should I do if my entire dianthus plant is infested with borers?

If your entire dianthus plant is infested with borers, it’s best to remove the plant entirely and dispose of it away from your garden or landscape. Do not compost the infected plant.

Are there any natural remedies to get rid of borers?

Yes, there are some natural remedies that can help get rid of borers. These include using neem oil, diatomaceous earth, or a mixture of water and dish soap. However, these remedies may not be as effective as insecticides and may require repeated applications.

In conclusion, borers can be a serious problem for dianthus growers. However, by identifying the signs of infestation early and taking prompt action, you can save your plant from damage and death. Remember to encourage the health of your dianthus plant to prevent future infestations.