How to Get Rid of Lerps on Silver Dollar Plant

Lerps are small, white, scale-like insects that often infest the leaves of the silver dollar plant (Lunaria annua). These pests not only cause unsightly damage to the plant but can also weaken its overall health. If you have noticed lerps on your silver dollar plant, it is important to take action promptly to prevent further infestation and ensure the plant’s longevity. In this article, we will explore effective methods for getting rid of lerps and keeping your silver dollar plant healthy.

Understanding Lerps and their Impact

Lerps are tiny insects that belong to the family Psyllidae. They are commonly found on a variety of plants, including silver dollar plants. Lerps form a protective scale-like covering over themselves using a sugary secretion called honeydew. This covering not only protects them from predators but also serves as a shield against insecticides.

Although lerps are relatively harmless in small numbers, a heavy infestation can cause significant damage to the silver dollar plant. The honeydew secreted by these insects can attract ants and promote the growth of sooty mold, which further weakens the plant’s health. Additionally, the feeding activity of lerps can stunt growth, cause leaf yellowing, and lead to premature leaf drop.

Manual Removal

One of the most effective ways to control lerp infestations on silver dollar plants is through manual removal. Start by inspecting the leaves of your plant and identifying the areas where lerps are present. Gently scrape off the lerps using your fingernail or a soft brush. Make sure to dispose of these insects in a sealed bag or container to avoid reinfestation.

Manual removal should be done regularly to prevent lerps from spreading and causing more damage. Check your silver dollar plant every few days and remove any newly formed lerps. This method may be tedious for large infestations, but it serves as an excellent preventive measure for smaller infestations.

Natural Predators

Introducing natural predators into your garden can help keep lerp populations in check. Ladybugs and lacewings are known to feed on lerps and can be beneficial allies in controlling their numbers. You can attract these predators by planting nectar-rich flowers nearby or purchasing them from garden supply stores.

Another natural predator that specifically targets lerps is the parasitic wasp. These tiny wasps lay their eggs inside the lerps, effectively killing them. Look for commercially available parasitic wasps that are safe to use in your garden and release them near your silver dollar plant.

Neem Oil

Neem oil is a widely used organic pesticide that can effectively control lerps on silver dollar plants. It works by disrupting the feeding and reproductive patterns of lerps, ultimately leading to their demise. To use neem oil, dilute it according to the manufacturer’s instructions and spray it onto the affected leaves of your silver dollar plant.

It is important to note that neem oil should be used with caution, as excessive use can harm beneficial insects as well. Apply it during the early morning or late evening when beneficial insects are less active. Regular application every 7-10 days may be necessary until the lerp infestation is under control.

Horticultural Oil

Horticultural oil is another effective option for controlling lerps on silver dollar plants. Like neem oil, horticultural oil disrupts the feeding activity of lerps and suffocates them by coating their bodies. Dilute the horticultural oil according to the manufacturer’s instructions and thoroughly coat the affected leaves, ensuring complete coverage.

Horticultural oil should be applied when temperatures are between 45-85°F (7-29°C) to prevent leaf burn. Avoid applying it during extreme temperature conditions or when the silver dollar plant is under stress. Regular application every 7-14 days may be necessary until the infestation is eradicated.

Conclusion

Lerps can be a nuisance for silver dollar plant owners, but with proper care and prompt action, their impact can be minimized. Regular inspection, manual removal, and the use of natural predators can help prevent infestations and keep your silver dollar plant healthy. Additionally, organic pesticides like neem oil and horticultural oil can provide effective control when necessary. By following these methods, you can enjoy a thriving silver dollar plant free from lerps and their damaging effects.