Updated: July 11, 2023

Introduction

Vinca plants, also known as periwinkle or myrtle, are popular choices for gardens and landscaping due to their vibrant flowers and low maintenance requirements. However, these beautiful plants can sometimes become infested with pests, such as lerps. Lerps are small, sap-sucking insects that create protective coverings on the leaves of plants, causing them to become discolored and stunted. If your vinca plant is suffering from a lerp infestation, don’t worry! In this article, we will discuss effective methods to get rid of lerps and restore the health of your vinca plant.

Identifying Lerps on Vinca Plants

Before we delve into the methods of getting rid of lerps, it is crucial to be able to identify these pests accurately. Lerps are small insects that measure about 2-3 millimeters in length. They are typically flat and oval-shaped and can be found clustered together on the undersides of vinca leaves. One of the distinctive signs of a lerp infestation is the presence of waxy, scale-like coverings that protect the insects from predators and harsh weather conditions. These coverings can appear as tiny bumps or dots on the leaves and may vary in color from white to brown.

Natural Ways to Control Lerps

If you prefer to use natural methods to control lerps on your vinca plants, there are several options available:

1. Handpicking

One of the simplest ways to control lerp populations is by physically removing them from the affected plants. This method is best suited for small infestations. Using a pair of tweezers or gloves, carefully pluck off the lerps along with their protective coverings from the leaves. Ensure that you dispose of them properly by either drowning them in soapy water or sealing them in a plastic bag before discarding them.

2. Blast with Water

Lerps can be dislodged from the leaves by spraying a strong stream of water on the affected areas. Use a hose with a nozzle attachment to direct the water at the undersides of the leaves, where the lerps are usually found. The force of the water should knock off the pests and their protective coverings, reducing their population on the plants.

3. Neem Oil Spray

Neem oil is a natural insecticide derived from the seeds of the neem tree. It is an effective option for controlling various pests, including lerps. Dilute neem oil according to the manufacturer’s instructions and spray it onto the vinca plant, focusing on the undersides of the leaves where the lerps are present. Neem oil works by disrupting the feeding and reproductive cycles of lerps, eventually leading to their demise.

4. Insecticidal Soap

Another natural option for controlling lerps is using insecticidal soap. This soap is specifically formulated to target soft-bodied insects like lerps. Mix the soap with water according to the package instructions and spray it onto the vinca plant, ensuring thorough coverage of all infested areas. The soap will suffocate and kill the lerps without harming beneficial insects or other plants in your garden.

Chemical Control Methods

If natural methods fail to adequately control lerp infestations on your vinca plants or if you are dealing with a severe infestation, you may need to resort to chemical control methods. It is important to note that while chemical pesticides can effectively eliminate lerps, they may also harm beneficial insects and can have adverse effects on human health and the environment. Therefore, it is crucial to follow label instructions carefully and consider these options as a last resort.

1. Systemic Insecticides

Systemic insecticides are absorbed by the plant and transported throughout its tissues, making them an effective option for controlling lerps. These insecticides can be applied as a soil drench or sprayed directly onto the foliage. As the plant takes up the insecticide, it becomes toxic to lerps when they feed on the sap. However, it is important to exercise caution when using systemic insecticides, as they can persist in the plant and may harm beneficial insects that feed on lerp-infested plants.

2. Contact Insecticides

Contact insecticides are applied directly onto the lerps and kill them upon contact. These insecticides typically contain active ingredients such as pyrethroids or neonicotinoids. When using contact insecticides, ensure that you thoroughly cover all infested areas of the vinca plant with the spray. It is important to follow label instructions carefully, including any precautions regarding the use of these chemicals around humans and pets.

Preventing Future Lerp Infestations

Prevention is always better than cure when it comes to lerp infestations on vinca plants. Here are a few tips to help prevent future outbreaks:

  1. Regularly inspect your vinca plants for any signs of lerp infestation, such as discolored leaves or waxy coverings.

  2. Keep your garden clean and free from debris to discourage pests from taking up residence.

  3. Avoid over-fertilizing your vinca plants, as excessive nitrogen can attract pests.

  4. Plant companion plants that repel lerps, such as marigolds or lavender, near your vinca plants.

  5. Encourage beneficial insects, such as ladybugs and lacewings, by providing them with suitable habitats and avoiding the use of broad-spectrum pesticides.

By following these preventive measures and promptly addressing any signs of lerp infestation, you can maintain healthy and thriving vinca plants in your garden.

Conclusion

Lerp infestations can be detrimental to the health and appearance of vinca plants. However, with the right knowledge and techniques, you can effectively control and eliminate these pests. Whether you prefer natural methods or chemical control, it is important to act promptly to prevent further damage to your vinca plants. By implementing preventive measures and regularly monitoring your plants, you can ensure the long-term health and beauty of your vinca garden.