Updated: July 9, 2023

The wax plant, also known as Hoya, is a popular houseplant due to its attractive foliage and unique flowers. However, like any other plant, wax plants can be susceptible to pests. One common pest that often affects wax plants is lerps. Lerps are small, scale-like insects that create a protective covering on the leaves of the plant. This covering not only makes the plant look unsightly but can also impede its growth. If you have noticed the presence of lerps on your wax plant, don’t worry! In this article, we will discuss effective methods to get rid of lerps and restore the health of your wax plant.

Understanding Lerps

Lerps are tiny insects that belong to the order Hemiptera. They are commonly found on a variety of plants, including wax plants. These insects feed on the sap of the plant by piercing the leaves and sucking out the nutrients. As they feed, they excrete a sticky substance called honeydew, which can attract ants and promote the growth of sooty mold.

Lerps are recognizable by the protective coverings they create on the leaves of the wax plant. These coverings resemble small bumps or raised scales and are often mistaken for part of the plant itself. Inside these coverings, the insects lay their eggs and go through their life cycle.

Identifying Infestation

To effectively treat lerps on your wax plant, it is important to correctly identify an infestation. Look for signs such as:

  1. Honeydew: If you notice a sticky residue on the leaves of your wax plant, it is likely a result of lerp feeding.

  2. Sooty Mold: The honeydew excreted by lerps can lead to the growth of sooty mold, a black fungus that covers the leaves.

  3. Coverings: Inspect the leaves of your wax plant for small, raised bumps or scales. These are the protective coverings created by the lerps.

  4. Stunted Growth: Lerps can cause stunted growth in wax plants, as they deprive the plant of essential nutrients.

Natural Methods to Get Rid of Lerps

When dealing with lerp infestations on your wax plant, it is always best to start with natural methods before resorting to chemical pesticides. Here are some effective natural methods to get rid of lerps:

1. Manual Removal

One of the simplest ways to control a lerp infestation is by manually removing the insects and their coverings from your wax plant. Gently scrape off the protective coverings using your fingernail or a soft brush. Be careful not to damage the leaves while doing this.

2. Pruning Infested Leaves

If the infestation is severe and widespread, it may be necessary to prune affected leaves. Use sharp, sterilized pruning shears to cut off heavily infested leaves. Make sure to dispose of the pruned leaves away from your other plants to prevent the spread of lerps.

3. Blast with Water

A strong stream of water can help dislodge lerps from your wax plant. Use a hose or a spray bottle filled with water and spray the affected leaves, focusing on areas with lerps and their coverings. Repeat this process daily until the infestation is under control.

4. Introduce Beneficial Insects

Ladybugs and lacewings are natural predators that feed on lerps and can help control their population. You can attract these beneficial insects to your garden by planting flowers such as daisies, marigolds, and cosmos.

Organic Insecticides for Lerp Control

If natural methods fail to eliminate the lerp infestation on your wax plant, you may consider using organic insecticides. Organic insecticides are derived from natural sources and are less harmful to the environment compared to synthetic pesticides. However, it is essential to carefully follow the instructions provided by the manufacturer when using any insecticide. Here are some organic insecticides you can use for lerp control:

1. Neem Oil

Neem oil is an effective organic insecticide that works by suffocating lerps and disrupting their life cycle. Dilute neem oil according to the instructions on the package and spray it onto the affected leaves. Repeat this process every 7-10 days until the infestation is eliminated.

2. Insecticidal Soap

Insecticidal soap is another organic option for controlling lerps. It works by penetrating the protective coverings and dehydrating the insects. Spray the soap solution onto the affected leaves, ensuring thorough coverage. Repeat this process every few days until the infestation subsides.

Preventing Future Infestations

Once you have successfully treated a lerp infestation on your wax plant, it is crucial to take preventive measures to avoid future infestations:

  1. Monitor Regularly: Regularly inspect your wax plant for signs of lerps or other pests. Early detection can prevent a minor issue from becoming a full-blown infestation.

  2. Maintain Optimal Conditions: Provide your wax plant with proper care, including adequate sunlight, appropriate watering, and well-draining soil. Healthy plants are less susceptible to pest infestations.

  3. Isolate New Plants: Before introducing a new plant to your collection, quarantine it for a few weeks to ensure it is pest-free. This will prevent the spread of any potential infestations.

  4. Maintain Cleanliness: Keep your gardening tools clean and free from debris to prevent the transfer of pests from one plant to another.

By following these preventive measures and promptly addressing any signs of infestation, you can keep your wax plant healthy and free from lerps.

In conclusion, lerps can be a nuisance for wax plant owners. However, with the right knowledge and techniques, you can effectively control and eliminate these pests. Remember to start with natural methods and only resort to organic insecticides if necessary. By taking preventive measures, you can maintain a healthy wax plant that thrives pest-free for years to come.