Updated: August 3, 2023

The Nepeta plant, commonly known as catmint or catnip, is a popular choice among gardeners due to its beautiful flowers and pleasant fragrance. However, like any other plant, it can also be susceptible to certain pests and diseases. One such pest that often infests the Nepeta plant is lerps. Lerps are small, sap-sucking insects that create protective coverings called lerps on the leaves and stems of the plant. These lerps not only disrupt the plant’s growth but also make it look unsightly. If you’re dealing with a lerp infestation on your Nepeta plant, here are some effective methods to get rid of them.

1. Identification

Before you start treating your Nepeta plant for lerps, it’s essential to correctly identify the infestation. Lerps are tiny insects that usually appear as brown or white bumps on the leaves or stems of the plant. These bumps are actually protective covers that the insects create for themselves using a sticky substance called honeydew. If you notice these bumps on your Nepeta plant, chances are you have a lerp infestation.

2. Pruning

One of the first steps in getting rid of lerps on your Nepeta plant is to prune the affected areas. Start by inspecting the plant closely and identifying the leaves and stems that have lerps on them. Using a pair of sterilized pruning shears, carefully remove these affected parts. Be sure to dispose of them properly, away from your garden, to prevent further infestation.

3. Natural Predators

Another effective method to control lerp populations on your Nepeta plant is by introducing natural predators into your garden. Ladybugs and lacewings are known to feed on lerps and can help reduce their numbers significantly. You can attract these beneficial insects to your garden by planting companion plants such as dill, fennel, and yarrow. Additionally, you can also purchase ladybugs or lacewings from a reputable garden center and release them onto your Nepeta plant.

4. Insecticidal Soap

If the infestation is severe and pruning or natural predators are not enough to control the lerps, you may need to resort to insecticidal soap. Insecticidal soaps are readily available in garden centers and are effective in killing soft-bodied insects like lerps. Before applying the soap, make sure to read and follow the instructions on the label carefully. Spray the affected areas of the Nepeta plant thoroughly, ensuring complete coverage. Repeat the application as necessary, following the recommended intervals mentioned on the product label.

5. Neem Oil

Neem oil is another organic treatment option that can effectively eliminate lerps from your Nepeta plant. It contains compounds that disrupt the life cycle of various pests, including lerps. Mix neem oil with water according to the instructions on the product label and spray it onto the affected areas of the plant. Ensure that you cover both the upper and lower surfaces of the leaves. Repeat this treatment every 7-14 days until the lerp infestation is under control.

6. Horticultural Oil

Horticultural oil is a petroleum-based product that smothers and kills pests like lerps by suffocating them. It is an effective treatment option for lerp infestations on your Nepeta plant. Dilute horticultural oil according to the instructions provided on the product label and spray it onto the affected parts of the plant, making sure to coat all surfaces thoroughly. Apply it during a calm, dry day to prevent any adverse effects on your plants.

7. Water Spray

A simple yet effective way to get rid of lerps is by using a strong jet of water to dislodge them from the Nepeta plant. Fill a spray bottle or use a hose with a nozzle attachment to direct a forceful stream of water onto the infested areas. The pressure from the water should be sufficient to knock the lerps off the plant. Repeat this treatment every few days until the infestation is resolved.

8. Maintain Plant Health

Keeping your Nepeta plant healthy and thriving is vital in preventing and combating lerp infestations. Make sure to provide your plant with appropriate sunlight, water, and nutrients, as healthy plants are less susceptible to pests and diseases. Additionally, regularly inspect your Nepeta plant for any signs of pests or diseases and take immediate action if you notice any issues.

In conclusion, getting rid of lerps on your Nepeta plant requires a combination of proactive measures and targeted treatments. Pruning affected areas, introducing natural predators, using insecticidal soap, neem oil, horticultural oil, and water sprays are all effective methods to control lerp infestations. Maintaining plant health is also crucial in preventing future infestations. By following these steps and being diligent in your approach, you can successfully eliminate lerps from your Nepeta plant and restore its beauty and vitality.