Updated: July 12, 2023

If you have a mermaid tail plant (Syngonium podophyllum) in your garden or indoor space, you may have encountered small, sticky pests known as lerps. These lerps can be quite annoying and detrimental to the health of your plant if not dealt with promptly. In this article, we will explore what lerps are, their impact on mermaid tail plants, and most importantly, how to get rid of them effectively.

Understanding Lerps

Lerps are the protective coverings created by insects known as psyllids. Psyllids are tiny sap-sucking insects that feed on the phloem sap of plants. They are commonly found on a variety of plants, including the mermaid tail plant. These pests are most active during warm weather and can reproduce rapidly if left unchecked.

The lerp itself is a small, oval-shaped structure made from a combination of wax, honeydew, and excrement. It serves as a shelter for the psyllid nymphs, protecting them from predators and environmental factors. The presence of lerps on your mermaid tail plant can be identified by their sticky texture and yellowish appearance.

Impact of Lerps on Mermaid Tail Plants

While lerps may seem harmless at first glance, they can cause significant damage to your mermaid tail plant if left untreated. The feeding activity of psyllids can weaken the plant by depleting its energy reserves. This can result in stunted growth, leaf discoloration, and overall decline in health.

Additionally, the honeydew secreted by psyllids can attract ants and promote the growth of sooty mold. Sooty mold is a black fungus that covers the leaves of plants, inhibiting photosynthesis and further weakening the plant.

Effective Ways to Remove Lerps

Getting rid of lerps on your mermaid tail plant requires a combination of physical and chemical control methods. Here are some effective strategies to combat these pests:

1. Manual Removal

The first step in controlling lerps is to physically remove them from your plant. Using a pair of gloves, gently scrape off the lerps from the leaves using your fingers or a soft brush. Be careful not to damage the leaves in the process. Dispose of the removed lerps in a sealed bag to prevent reinfestation.

2. Pruning Infested Branches

If the infestation is severe and widespread, consider pruning the affected branches of your mermaid tail plant. Start by identifying the branches with the highest concentration of lerps and carefully cut them off using sanitized pruning shears. This will not only remove the majority of lerps but also stimulate new growth.

3. Insecticidal Soap

Insecticidal soaps are an effective and environmentally friendly option for controlling lerps. These soaps work by suffocating the pests and disrupting their cell membranes. Dilute the soap according to the instructions on the packaging and spray it directly onto the lerps and affected areas of your mermaid tail plant. Repeat this process every 7-10 days until the infestation is under control.

4. Neem Oil

Neem oil is a natural pesticide derived from the seeds of the neem tree (Azadirachta indica). It acts as both an insecticide and a fungicide, making it an excellent choice for combating lerps and preventing sooty mold. Mix neem oil with water according to the instructions on the bottle and spray it onto your mermaid tail plant, paying special attention to the undersides of leaves where psyllids often hide.

5. Biological Control

Introducing natural predators of psyllids, such as ladybugs or lacewings, can help keep the population of lerps in check. These beneficial insects feed on psyllids and their nymphs, reducing their numbers over time. You can attract these predators to your garden by planting flowers that provide nectar and pollen as food sources.

6. Regular Maintenance

Preventing lerp infestations in the first place is key to maintaining a healthy mermaid tail plant. Regularly inspect your plant for signs of pests and promptly address any issues you find. Keep your plant well-watered and fertilized to promote its overall vigor, making it less susceptible to infestations.

Conclusion

Lerps can be a nuisance and a threat to the health of your mermaid tail plant. By understanding what lerps are, their impact on plants, and employing effective control methods such as manual removal, pruning, insecticidal soap, neem oil, biological control, and regular maintenance, you can successfully get rid of these pests and ensure the continued growth and beauty of your mermaid tail plant. Remember, early detection and intervention are key to preventing extensive damage caused by lerps.