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How to Get Rid of Lerps on Golden Madonna Plant

Updated: May 14, 2022

If you have a Golden Madonna plant (Thyrsodium ramosissimum), you may be familiar with the small, white, waxy bumps that form on the leaves and stems of the plant. These bumps are called lerps and are caused by a tiny insect known as the lerp psyllid. While not harmful to the plant’s health, lerps can be unsightly and make it harder for the plant to absorb sunlight. Here are some tips for getting rid of lerps on your Golden Madonna plant.

1. Prune Infested Branches

The easiest way to get rid of lerps is to prune off the infested branches. Use sharp pruning shears to cut off any branches with lerps and dispose of them in a sealed plastic bag. Be sure to sanitize your pruning shears with rubbing alcohol or bleach before using them again.

2. Blast Them Off With Water

Another effective method for getting rid of lerps is to blast them off with a strong stream of water. Use a garden hose or spray bottle filled with water to spray the leaves and stems of the plant, focusing on areas with the most lerps. This method won’t necessarily kill the lerp psyllids, but it will remove their protective covering and make them more vulnerable to predators.

3. Apply Insecticidal Soap

Insecticidal soap is a non-toxic and organic solution for getting rid of lerps on your Golden Madonna plant. Look for a soap specifically formulated for plants and follow the instructions carefully. In general, you’ll want to apply the soap directly to the lerps using a spray bottle or garden sprayer. Wait a few hours before rinsing off the soap with water.

4. Introduce Natural Predators

There are several natural predators that feed on lerp psyllids, including ladybugs, lacewings, and parasitic wasps. You can introduce these predators to your garden by purchasing them from a reputable supplier or by planting plants that attract them, such as dill, fennel, and yarrow.

5. Use Chemical Insecticides (As a Last Resort)

If all else fails, you can use chemical insecticides to get rid of lerps on your Golden Madonna plant. However, this should be a last resort as many insecticides can be harmful to beneficial insects and pollinators. Look for an insecticide specifically labeled for use on lerp psyllids and follow the instructions carefully.

FAQs

Are lerps harmful to my Golden Madonna plant?

While lerps aren’t harmful to the health of your Golden Madonna plant, they can make it harder for the plant to absorb sunlight and can be unsightly.

Can I use dish soap instead of insecticidal soap?

No, dish soap is not formulated for use on plants and can harm the leaves and stems of your Golden Madonna plant. Use an insecticidal soap specifically labeled for use on plants.

How often should I check my Golden Madonna plant for lerps?

It’s a good idea to check your Golden Madonna plant regularly for signs of lerps, especially during the growing season. Check the leaves and stems of the plant for small, white bumps or waxy coverings.

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