Updated: July 5, 2023

Viburnum plants are beloved for their beautiful flowers, attractive foliage, and ability to attract birds and butterflies. However, like any other plant, they can be susceptible to pest infestations. One common pest that can wreak havoc on viburnum plants is the crusader bug. These small insects feed on the sap of the plant, causing damage to the leaves and stems. If left untreated, a crusader bug infestation can weaken the viburnum plant and even lead to its death. In this article, we will discuss effective ways to get rid of crusader bugs and protect your viburnum plant.

Identifying Crusader Bugs

Before you can effectively eliminate crusader bugs from your viburnum plant, it is important to correctly identify them. Crusader bugs (Mictis profana) are small insects that measure approximately 0.25 inches in length. They have a distinct shield-like shape and are typically brown or green in color. You may also notice red or orange markings on their bodies.

Crusader bugs can usually be found on the undersides of leaves or along the stems of viburnum plants. They feed by piercing the plant tissue with their mouthparts and sucking out the sap. This feeding activity can result in discolored leaves, stunted growth, and even plant death if left untreated.

Natural Remedies for Getting Rid of Crusader Bugs

If you prefer to use natural methods to control pests in your garden, there are several options available to help you get rid of crusader bugs on your viburnum plant:

1. Manual Removal

One simple way to control a crusader bug infestation is by manually removing the insects from the plant. Wear gloves and inspect the undersides of leaves and stems carefully. Use your fingers or a soft brush to brush off the bugs and drop them into a container of soapy water to drown them. Repeat this process regularly to ensure you remove all the bugs.

2. Neem Oil

Neem oil is a natural pesticide derived from the neem tree. It is effective against a wide range of pests, including crusader bugs. Mix one teaspoon of neem oil with a quart of water and spray the solution onto the affected parts of the viburnum plant. Make sure to cover all surfaces, including the undersides of leaves. Repeat this treatment every two weeks until the infestation is under control.

3. Insecticidal Soap

Insecticidal soap is another organic option for controlling crusader bugs on viburnum plants. This soap disrupts the cell membranes of the insects, causing them to dehydrate and die. Mix one tablespoon of insecticidal soap with a quart of water and spray it onto the affected areas of the plant. Be sure to cover both sides of the leaves thoroughly. Repeat this treatment every five to seven days until the infestation is eliminated.

4. Beneficial Insects

Introducing beneficial insects to your garden can help control pest populations naturally. Ladybugs and lacewings are known predators of crusader bugs and can be purchased from garden supply stores or online. Release these beneficial insects near your viburnum plant and let them do their work in keeping crusader bug numbers in check.

Chemical Control Options

If natural remedies do not provide sufficient control over crusader bug infestations, you may need to resort to chemical control methods. However, it is important to use chemical pesticides responsibly and according to label instructions:

1. Pyrethroid Insecticides

Pyrethroid insecticides, such as permethrin or cypermethrin, are commonly used to control crusader bugs on ornamental plants. These chemicals work by disrupting the nervous system of the insects. Follow the instructions on the product label for application rates and safety precautions.

2. Systemic Insecticides

Systemic insecticides are absorbed by the plant and transported throughout its tissues, making them effective against pests that feed on the sap. Apply a systemic insecticide to the soil around the base of the viburnum plant, and it will be taken up by the roots and distributed throughout the plant. Be sure to read and follow the instructions carefully to ensure safe and effective use.

Prevention is Key

While it is important to know how to get rid of crusader bugs on viburnum plants, prevention is always better than cure. Here are some tips to help prevent a crusader bug infestation in the first place:

  • Regularly inspect your plants: Regularly check your viburnum plants for signs of pest activity, such as discolored leaves or distorted growth. Early detection can help prevent an infestation from spreading.

  • Maintain plant health: Keep your viburnum plants healthy by providing them with proper care, including regular watering, appropriate fertilization, and pruning as needed. Healthy plants are more resistant to pests and diseases.

  • Promote biodiversity: Encourage beneficial insects, such as ladybugs and lacewings, to visit your garden by planting a variety of flowering plants that attract them. These beneficial insects will help keep pest populations in check naturally.

By following these tips and using effective pest control methods, you can protect your viburnum plants from crusader bug infestations and enjoy their beauty for years to come. Remember to choose the method that best suits your preferences and always prioritize the health of your plants and the environment.