Updated: August 1, 2023

If you have noticed tiny, white, waxy bumps on your stonecrop plant leaves, you may be dealing with an infestation of lerps. Lerps are small insects that are often found on succulent plants like stonecrop. While they may not cause significant damage to the plant, their presence can be unsightly and may affect the overall health of the plant if left untreated. In this article, we will discuss effective methods to get rid of lerps and restore your stonecrop plant to its full glory.

What are Lerps?

Lerps are small, sap-sucking insects that belong to the psyllid family. They are commonly found on stonecrop plants, also known as sedums. These insects create protective covers made from waxy secretions, which resemble tiny white bumps or shells on the leaves of the plant. The lerps serve as a shelter for the insects, protecting them from predators and adverse environmental conditions.

While lerps themselves may not cause significant harm to stonecrop plants, their feeding activity can lead to weakened growth and reduced vigor. Additionally, the presence of lerps can be aesthetically displeasing, especially when they cover a large portion of the plant’s foliage.

Identifying Lerps Infestation

To effectively tackle lerps infestation on your stonecrop plant, it is important to first identify the signs of their presence. Look out for the following indicators:

  1. White Bumps on Leaves: The most obvious sign of lerps infestation is the presence of small white bumps or shells on the leaves. These bumps are usually about 1-2 millimeters in diameter and are often clustered together.

  2. Sticky Residue: Lerps excrete a sticky substance called honeydew as they feed on the sap of the plant. If you notice a shiny, sticky residue on the leaves or surrounding areas, it could indicate the presence of lerps.

  3. Ant Activity: Ants are attracted to the sweet honeydew excreted by lerps. If you observe an increase in ant activity around your stonecrop plant, it may be a sign of a lerps infestation.

Methods to Get Rid of Lerps

Fortunately, there are several effective methods to control and eliminate lerps infestation on stonecrop plants. Let’s explore some of these methods:

1. Manual Removal

One of the easiest ways to get rid of lerps is by manually removing them from the affected plant. Gently scrape off the lerps using a soft brush or your fingers. Be careful not to damage the leaves while doing this. Dispose of the removed lerps properly to prevent reinfestation.

2. Pruning Infested Leaves

If the infestation is limited to a few leaves, you can prune off those affected parts to prevent the spread of lerps. Use clean, sharp pruning shears to cut off the infested leaves at their base. Make sure to sanitize the pruning tools after each use to avoid spreading any potential diseases.

3. Natural Predators

Introducing natural predators into your garden can help control a lerp infestation. Ladybugs and lacewings are known to feed on lerps and can be beneficial in reducing their numbers. You can attract these beneficial insects by planting flowers that provide nectar and pollen nearby.

4. Horticultural Oils

Horticultural oils are effective in suffocating and killing lerps on stonecrop plants. These oils work by coating the insects, disrupting their breathing apparatus, and causing their eventual demise. Apply a light mist of horticultural oil directly onto the affected leaves, making sure to cover both sides thoroughly.

5. Insecticidal Soaps

Insecticidal soaps are also an effective control method for lerps infestation. These soaps contain fatty acids that penetrate the protective wax coating of the lerps, causing dehydration and death. Follow the instructions on the product label and apply the soap spray to the affected leaves, ensuring complete coverage.

6. Neem Oil

Neem oil is a natural insecticide derived from the neem tree. It has both pesticidal and repellent properties, making it effective against lerps infestation. Dilute neem oil according to the instructions on the product label and spray it onto the affected areas of your stonecrop plant. Repeat the treatment every two weeks until the infestation is under control.

7. Systemic Insecticides

In severe cases where other control methods have proven ineffective, systemic insecticides can be considered as a last resort. These insecticides are absorbed by the plant, making them toxic to lerps when they feed on the sap. However, it is important to use systemic insecticides with caution and follow the instructions carefully to avoid any harm to beneficial insects or other plants in your garden.

Preventing Lerps Infestation

Prevention is always better than cure when it comes to plant pests. To minimize the risk of a lerp infestation on your stonecrop plants, follow these preventive measures:

  • Regular Inspections: Regularly inspect your stonecrop plants for any signs of lerps or other pests. Early detection can help prevent the infestation from spreading.

  • Proper Hygiene: Maintain good garden hygiene by removing fallen leaves and plant debris regularly. These can serve as hiding places or breeding grounds for pests.

  • Avoid Overfertilization: Excessive fertilization can make plants more susceptible to pests and diseases. Follow recommended fertilization practices for stonecrop plants to maintain their health and vigor.

  • Adequate Air Circulation: Ensure that your stonecrop plants have adequate air circulation. This helps prevent the buildup of moisture, which can create a favorable environment for lerps and other pests.

By following these preventive measures and promptly addressing any signs of a lerp infestation, you can keep your stonecrop plants healthy and free from these tiny pests.

In conclusion, lerps infestation on stonecrop plants can be effectively managed through various control methods such as manual removal, pruning, natural predators, horticultural oils, insecticidal soaps, neem oil, and systemic insecticides. Additionally, practicing preventive measures can help minimize the risk of future infestations. With proper care and attention, your stonecrop plant can thrive and showcase its natural beauty once again.