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How to Get Rid of Lerps on Exacum Plant

Updated: April 6, 2022

Exacum plants, also known as Persian violets or German violets, are popular houseplants that feature beautiful clusters of blue, purple, and white flowers. However, these plants are susceptible to an infestation of pests called lerps. These small insects are commonly found on the undersides of the Exacum plant leaves and can cause significant damage if not treated promptly.

What are Lerps?

Lerps are small, winged insects that belong to the family Psyllidae. They are typically less than 1/8 inch long and have a flattened body shape. Lerps feed on the sap of plants, causing yellowing and wilting of leaves. They also excrete a sticky honeydew substance that attracts other pests such as ants.

Identifying Lerps on Exacum Plants

Lerps on Exacum plants can be identified by small, white, waxy structures that cover their bodies. These structures look like tiny bumps and can be seen on the undersides of the leaves. The lerps themselves can be difficult to see because they often blend in with the plant’s foliage.

How to Get Rid of Lerps on Exacum Plants

The good news is that lerps can be effectively controlled with the right treatment methods. Here are some steps you can take to get rid of lerps on your Exacum plant:

Step 1: Remove Infested Leaves

The first step in controlling lerps on your Exacum plant is to remove any infested leaves. This will help prevent the lerps from spreading to other parts of the plant. Use sharp scissors or pruning shears to cut off affected leaves and dispose of them in a sealed plastic bag.

Step 2: Wash the Plant

Next, wash your Exacum plant thoroughly using warm water and a mild soap or insecticidal soap. This will help remove any remaining lerps or eggs from the plant’s surface. Be sure to rinse the plant well with clean water to prevent soap residue from building up on the leaves.

Step 3: Apply Horticultural Oil

Horticultural oil is a safe and effective way to control lerps on Exacum plants. This oil works by suffocating the insects and their eggs. Apply horticultural oil according to the manufacturer’s instructions, making sure to cover both the upper and lower surfaces of the leaves.

Step 4: Monitor the Plant

After treating your Exacum plant for lerps, it’s important to monitor it closely for any signs of new infestations. Check the plant regularly for any signs of damage or pests, and take action immediately if you notice any issues.


Are lerps harmful to humans?

No, lerps are not harmful to humans.

Can I use neem oil to control lerps on my Exacum plant?

Yes, neem oil is a natural insecticide that can be effective in controlling lerps on Exacum plants. Follow the manufacturer’s instructions for application.

How do I prevent lerps from infesting my Exacum plant?

Keeping your Exacum plant healthy and well-watered can help prevent lerps from infesting it. You can also use sticky traps or spray your plant with an insecticidal soap as a preventative measure.

Can I use chemical pesticides to control lerps on my Exacum plant?

Chemical pesticides should be used as a last resort as they can harm beneficial insects and pollinators. It’s best to try natural methods such as horticultural oil or neem oil first before resorting to chemical pesticides.

In conclusion, lerps can be a frustrating pest to deal with on Exacum plants. However, with the right treatment methods and a little patience, you can effectively control these pests and keep your plant healthy and beautiful. Remember to monitor your plant closely and take action immediately if you notice any signs of damage or infestations.