Updated: July 22, 2023

The mirror plant, scientifically known as Coprosma repens, is a popular choice for gardens and landscapes due to its attractive glossy leaves that reflect light. However, like any other plant, mirror plants can also fall victim to various pests, including crusader bugs. These tiny insects can cause significant damage to the leaves and overall health of the plant if left untreated. In this article, we will discuss effective methods to get rid of crusader bugs and ensure the well-being of your mirror plant.

Identifying Crusader Bugs

Before delving into the methods of eradication, it is vital to identify crusader bugs accurately. These bugs are small, ranging from 4 to 6 millimeters in size, and have a distinct shield-like shape. They are usually brown or black in color, with yellow or orange markings on their wings. Crusader bugs feed on the sap of plants and often cluster on the undersides of leaves.

Prevention is Key

As with any pest infestation, prevention is key to maintaining a healthy mirror plant. Here are some preventive measures you can take to minimize the risk of crusader bug infestation:

  1. Regularly inspect your plants: Routinely check your mirror plant for any signs of bug activity. Look for adult crusader bugs or their eggs on the leaves, stems, and undersides of the foliage.

  2. Keep your garden clean: Remove any fallen leaves or debris from around your mirror plant. These can provide hiding spots for bugs and create a favorable environment for their reproduction.

  3. Plant companion flowers: Certain flowers, such as marigolds and petunias, act as natural repellents for many common garden pests, including crusader bugs. Intercropping these flowers with your mirror plant can help deter the bugs.

  4. Encourage natural predators: Attracting natural predators, such as ladybugs and lacewings, to your garden can help control crusader bug populations. Planting nectar-rich flowers and avoiding the use of broad-spectrum insecticides will encourage these beneficial insects to visit your garden.

Non-chemical Control Methods

If you notice a crusader bug infestation on your mirror plant, there are several non-chemical control methods you can employ to get rid of them:

  1. Pruning affected leaves: Inspect your mirror plant carefully and prune any leaves or stems that show signs of heavy bug infestation. Dispose of the pruned material properly to prevent the bugs from spreading to other plants.

  2. Manual removal: For smaller infestations, you can manually remove the bugs from the plant by gently brushing them off with your fingers or using a soft brush. Be thorough in your approach to ensure all bugs are removed.

  3. Water spray: Use a strong stream of water from a hose to dislodge crusader bugs from the foliage. Aim the water at the undersides of the leaves, where they tend to congregate. Repeat this process every few days until the infestation is under control.

  4. Neem oil: Neem oil is an organic insecticide derived from the neem tree. It acts as a repellent and disrupts the feeding and reproductive cycles of many pests, including crusader bugs. Dilute neem oil according to the manufacturer’s instructions and spray it directly on the affected plant parts. Repeat this treatment weekly until the bugs are eradicated.

Chemical Control Methods

If non-chemical methods do not yield satisfactory results or if the infestation is severe, you may need to resort to chemical control methods. However, it is essential to use these methods as a last resort and follow all safety precautions:

  1. Insecticidal soap: Insecticidal soaps are specifically formulated to kill soft-bodied insects like crusader bugs. Dilute the soap according to the instructions and apply it directly to the affected plant parts. Ensure thorough coverage, especially on the undersides of the leaves, where the bugs usually reside.

  2. Pyrethrin-based insecticides: Pyrethrin is a natural insecticide derived from chrysanthemum flowers. It is effective against crusader bugs and many other pests. Follow the instructions on the product label and avoid using it during peak sunlight hours to prevent damage to the plant.

Remember, when using chemical control methods, always read and follow the instructions provided by the manufacturer. Wear appropriate protective gear such as gloves and goggles, and avoid applying chemicals when bees or other beneficial insects are active.

Conclusion

Dealing with crusader bugs on your mirror plant can be a challenging task, but with proper identification and prompt action, you can effectively control and eliminate these pests. Remember to prioritize prevention, employ non-chemical control methods first, and only resort to chemical treatments if necessary. With a little effort and vigilance, your mirror plant can thrive pest-free and continue to add beauty to your garden.