Updated: July 24, 2023

The pencil plant, also known as Euphorbia tirucalli, is a popular indoor plant known for its unique pencil-like branches. However, like any other houseplant, it is susceptible to various pests, including crusader bugs.

Crusader bugs, scientifically known as Mictis profana, are small insects that belong to the order Hemiptera. They are commonly found in tropical and subtropical regions and are known for their voracious appetites. These bugs feed on the sap of plants, causing damage to the foliage and weakening the overall health of the plant.

If you notice crusader bugs infesting your pencil plant, it’s essential to take immediate action to eliminate them and prevent further damage. Here are some effective methods to get rid of crusader bugs on your pencil plant:

1. Identify the Infestation

Before you can effectively treat crusader bugs on your pencil plant, you need to confirm that they are indeed the culprit. Crusader bugs are small insects with a brownish or greenish coloration. They have a distinct shield-like shape and can often be found congregating on the undersides of leaves or along the stems.

Examine your pencil plant closely for any signs of crusader bug infestation, such as tiny holes in the leaves, yellowing or wilting foliage, or the presence of sticky residue (honeydew) on the leaves. If you spot these signs along with the bugs themselves, it’s time to take action.

2. Remove Infested Leaves

Start by removing any heavily infested leaves from your pencil plant. Use a pair of sterilized pruning shears or scissors to carefully cut off the affected leaves close to the stem. Dispose of these leaves in a sealed bag or container to prevent further spread of the bugs.

3. Isolate the Plant

To prevent crusader bugs from spreading to other plants in your home, it’s essential to isolate the infested pencil plant. Move it away from other houseplants and place it in a separate area, preferably outdoors if weather permits. This will help contain the infestation and make it easier to treat the plant.

4. Natural Remedies

There are several natural remedies you can try to eliminate crusader bugs from your pencil plant. These remedies are safe for both the plant and the environment:

Neem Oil Spray

Neem oil is a natural insecticide derived from the neem tree. It contains compounds that disrupt the feeding and reproductive patterns of crusader bugs, ultimately leading to their demise. Dilute neem oil according to the instructions on the product label and spray it onto the leaves and stems of your pencil plant. Repeat this process every few days until the infestation is under control.

Soap Solution

A simple soap solution can also be effective in controlling crusader bugs. Mix a few drops of mild liquid dish soap with water in a spray bottle and spray it directly onto the bugs and affected areas of your pencil plant. The soap solution suffocates the insects and disrupts their cell membranes, killing them in the process. Repeat this treatment every few days until the infestation subsides.

5. Chemical Insecticides

If natural remedies fail to eliminate the crusader bug infestation on your pencil plant, you may need to resort to chemical insecticides as a last resort. However, exercise caution when using chemical pesticides, as they can be harmful to humans, pets, and beneficial insects.

Choose an insecticide specifically formulated for crusader bugs or general houseplant pests. Follow the instructions on the product label carefully and apply the insecticide according to the recommended dosage. Remember to wear protective clothing, gloves, and a mask when handling chemical pesticides.

6. Regular Maintenance

To prevent future infestations of crusader bugs or other pests, it’s important to maintain a healthy and clean environment for your pencil plant. Here are some maintenance tips to keep in mind:

  • Regularly inspect your pencil plant for any signs of pest infestation. Early detection is key to preventing the spread of bugs.
  • Keep your pencil plant away from other plants that may be infested with pests.
  • Avoid overwatering your plant, as excessive moisture can attract pests.
  • Provide adequate sunlight and proper air circulation for your pencil plant to promote its overall health and resilience against pests.

By following these steps and implementing the appropriate control methods, you can effectively eliminate crusader bugs from your pencil plant and ensure its continued growth and vitality. Remember, prevention is always better than cure, so regular monitoring and maintenance are crucial in keeping your houseplants pest-free.