Updated: July 24, 2023

Crusader bugs, also known as soldier bugs or leatherbugs, are small insects that can infest and damage plants, including the orpine plant. These bugs have a distinctive appearance with their shield-like bodies and long antennae. While they may be beneficial in some cases as predators of other pests, a large population of crusader bugs can cause significant harm to your orpine plant. If you are dealing with an infestation, here are some effective methods to get rid of crusader bugs and protect your beloved plant.

1. Identify the Problem

Before taking any action, it is essential to correctly identify the insect infesting your orpine plant as crusader bugs. These bugs are approximately half an inch long and have a dark brown or black body with distinctive orange or red markings. They have a tri-segmented body with a large shield-like pronotum covering their thorax. Their long antennae and piercing-sucking mouthparts are also characteristic features.

2. Natural Predators

One way to control crusader bug populations is by encouraging their natural predators in your garden. Ladybugs, lacewings, and birds such as sparrows are known to feed on crusader bugs. By creating a diverse and balanced ecosystem in your garden, you can attract these natural predators and create a natural control mechanism for the pest population.

To attract ladybugs and lacewings, consider planting nectar-rich flowers such as daisies, marigolds, and yarrow. Providing birdhouses and bird feeders can also help attract birds that prey on crusader bugs.

3. Manual Removal

If the infestation is limited to a few plants or individual bugs, manual removal can be an effective method of control. Put on a pair of gloves and inspect your orpine plants carefully. Look for adult crusader bugs, nymphs, and egg clusters. Remove the bugs by hand and crush them or drown them in soapy water to prevent their escape.

Be thorough in your inspection, paying close attention to the undersides of leaves, stems, and flower buds where crusader bugs tend to hide. Regularly monitor your plants and repeat this process as necessary to keep the population under control.

4. Neem Oil

Neem oil is a widely used organic insecticide that can help eliminate crusader bugs on your orpine plant. It is derived from the neem tree and contains compounds that disrupt the feeding and reproductive processes of insects.

To use neem oil, dilute it according to the manufacturer’s instructions and spray it directly on your orpine plants, focusing on the areas where crusader bugs are present. Repeat this treatment every 7-10 days until the infestation is under control.

5. Insecticidal Soap

Insecticidal soap can be another effective remedy for controlling crusader bugs on orpine plants. It works by suffocating the insects when it comes into contact with their bodies.

To make your own insecticidal soap, mix one tablespoon of liquid dish soap with one quart of water. Pour the solution into a spray bottle and apply it directly to the affected parts of your orpine plant. Be sure to thoroughly coat both sides of the leaves, as well as the stems and flower buds. Repeat this treatment every 5-7 days until the infestation subsides.

6. Introduce Beneficial Nematodes

Beneficial nematodes are microscopic roundworms that can be effective in controlling crusader bug populations. These nematodes enter the bodies of insects and release bacteria that cause disease, ultimately leading to their death.

To use beneficial nematodes, follow the instructions provided with the product carefully. Typically, you will mix the nematodes with water and apply the solution to the soil around your orpine plants. The nematodes will then seek out crusader bug larvae and pupae in the soil and infect them. Repeat this treatment as necessary to maintain control over the pest population.

7. Crop Rotation and Companion Planting

Practicing crop rotation and companion planting can help prevent future crusader bug infestations. By rotating your crops each season, you disrupt the life cycle of these pests, making it more challenging for them to establish themselves in your garden.

Companion planting involves growing certain plants together that have mutually beneficial relationships. For example, planting marigolds or garlic near your orpine plants can repel crusader bugs due to their strong scent. Additionally, interplanting with aromatic herbs like basil and thyme can attract beneficial insects that prey on crusader bugs.

In conclusion, getting rid of crusader bugs on your orpine plant requires a combination of strategies. Identifying the problem, encouraging natural predators, manual removal, using organic insecticides like neem oil and insecticidal soap, introducing beneficial nematodes, and practicing crop rotation and companion planting are all effective methods to tackle this pest. By implementing these strategies, you can protect your orpine plants and ensure they thrive without the threat of crusader bug infestations.