How to Get Rid of Lerps on Catmint Plant

If you have a catmint plant, you may have noticed small white or brown bumps on the leaves. These bumps are called lerps and they are actually the protective covering for tiny insects called psyllids. While psyllids themselves don’t typically cause much damage to the plant, the lerps can reduce photosynthesis and stunt growth. Here are some tips for getting rid of lerps on your catmint plant.

Identify the Problem

Before you can effectively treat the lerp problem, it’s important to make sure that’s what you’re dealing with. If you see bumps on your plant but aren’t sure if they’re lerps, take a closer look. You should be able to see tiny insects moving around inside the bumps. If you’re still not sure, take a sample to your local nursery or agricultural extension office for identification.

Remove Infested Leaves

One of the easiest ways to get rid of lerps is to simply remove the affected leaves. This can be done by hand or with pruning shears. Be sure to dispose of the leaves in a sealed plastic bag so the insects don’t spread to other plants.

Blast Them Away

If you only have a few plants with lerps, you can try blasting them away with a strong stream of water. This will knock off both the lerps and the psyllids inside. Be sure to focus on the undersides of the leaves where the insects like to congregate.

Use Insecticidal Soap

Insecticidal soap is an effective and natural way to get rid of lerps. Look for a product specifically labeled for use on psyllids or aphids, as they are in the same family. Follow the instructions carefully and be sure to spray both sides of all affected leaves.

Introduce Beneficial Insects

There are several beneficial insects that prey on psyllids and their eggs. Ladybugs, lacewings, and parasitic wasps are all good options. You can buy these insects online or at your local garden center. Be sure to release them at dusk when the psyllids are most active.

FAQ

What causes lerps on catmint?

Lerps are caused by tiny insects called psyllids. They secrete a protective covering over themselves called a lerp.

Are lerps harmful to catmint?

While the psyllids themselves don’t cause much damage, the lerps can reduce photosynthesis and stunt growth.

Can I use chemical insecticides to get rid of lerps?

Chemical insecticides can be effective against psyllids, but they can also harm beneficial insects and pollinators. Insecticidal soap is a safer option.

How often should I treat my catmint for lerps?

Treatment frequency will depend on the severity of the infestation. Check your plants regularly and treat as needed.

Can I prevent lerps from forming on my catmint?

Keeping your plants healthy with proper watering and fertilization can help prevent psyllids from infesting in the first place. Introducing beneficial insects can also help keep populations under control.