Updated: July 3, 2023

If you have a Tropic Snow plant in your garden, you may have noticed the presence of small, white, waxy structures on its leaves. These structures are called lerps and are created by tiny insects known as psyllids. While lerps themselves do not cause significant damage to the plant, a heavy infestation can weaken the plant and make it more susceptible to diseases. If left untreated, lerps can multiply rapidly and become a nuisance. Fortunately, there are several effective ways to get rid of lerps on your Tropic Snow plant. In this article, we will explore these methods and help you restore your plant’s health.

Understanding Lerps and Psyllids

Before delving into the methods of eliminating lerps, it is essential to understand the creatures responsible for their creation – psyllids. Psyllids are tiny insects that feed on the sap of plants, potentially causing damage to their host. They are commonly found in temperate and tropical regions worldwide.

Psyllids use their piercing mouthparts to extract sap from plants. As they feed, they excrete excess sugars and other substances, which combine with wax produced by the psyllid to form protective structures called lerps. These structures shield the nymphs and adults from predators and environmental stressors.

While lerps may not necessarily harm the plant directly, their presence can reduce photosynthesis and hinder overall plant growth. Additionally, excessive lerp accumulation can create an unsightly appearance on the leaves, affecting the aesthetic appeal of your Tropic Snow plant.

Manual Removal

The first step in getting rid of lerps is manual removal. This method involves physically removing the lerps from the leaves using your fingers or a soft brush. Gently rub or brush off the lerps from both sides of the leaf surface. Be careful not to damage the leaves in the process.

Manual removal is most effective when dealing with a small infestation or as a preventive measure. Regularly inspect your Tropic Snow plant for the presence of lerps and remove them promptly. This method alone may not suffice for heavy infestations but can significantly reduce the population of psyllids and prevent further damage to the plant.

Natural Predators

Introducing natural predators into your garden can be an effective way to control psyllid populations and thus reduce lerp infestations. Ladybugs, lacewings, and parasitic wasps are some common predators that feed on psyllids and their eggs. By attracting these beneficial insects to your garden, you can create a natural balance that keeps psyllid populations in check.

To attract ladybugs and lacewings, you can plant nectar-rich flowers such as daisies, marigolds, and yarrow. These flowers provide a food source for the adult predators and also act as a magnet for psyllids, luring them away from your Tropic Snow plant. Additionally, you can purchase ladybugs or lacewing larvae from your local garden center and release them directly onto the affected plant.

Parasitic wasps, on the other hand, are more specialized predators that lay their eggs inside psyllid nymphs. As the wasp larvae develop, they consume the psyllids from within, eventually killing them. You can encourage parasitic wasps by planting host plants such as fennel or dill nearby. These plants provide a habitat for the wasps and attract them to your garden.

Horticultural Oils

Horticultural oils are a popular choice for controlling lerps on Tropic Snow plants. These oils work by suffocating the insects and their eggs, effectively eliminating them from your plant. When applying horticultural oils, it is crucial to follow the manufacturer’s instructions carefully to ensure proper dilution and application.

Before using horticultural oils, test them on a small portion of the plant to check for any adverse reactions. Apply the oil to both sides of the leaves, ensuring thorough coverage. Repeat the application as recommended by the manufacturer or until the lerp infestation is under control.

Neem Oil

Neem oil is another effective natural remedy for getting rid of lerps on Tropic Snow plants. Neem oil is derived from the seeds of the neem tree and contains compounds that disrupt the lifecycle of insects, including psyllids. It acts as an insect repellent and also has antifeedant properties, preventing psyllids from feeding on your plant.

To use neem oil, dilute it according to the instructions on the product label. Apply the solution to both sides of the leaves, ensuring complete coverage. Repeat the application every 7-10 days or as recommended by the manufacturer until the infestation is resolved.

Conclusion

Lerps on Tropic Snow plants can be a cause for concern for gardeners. However, with proper knowledge and effective control methods, you can restore your plant’s health and beauty. Remember to regularly inspect your plants for lerps, manually remove them when possible, and consider introducing natural predators to keep psyllid populations in check. Additionally, horticultural oils and neem oil can be used as effective treatments to eliminate lerps. By combining these methods and staying vigilant, you can ensure a lerp-free environment for your Tropic Snow plants.