Updated: July 24, 2023

Lupine plants are known for their vibrant and beautiful flowers, making them a popular choice for many gardeners. However, these plants are also prone to infestation by various pests, including crusader bugs. These tiny insects can cause significant damage to your lupine plant if left unchecked. In this article, we will discuss effective methods to get rid of crusader bugs and protect your lupine plant.

Identifying Crusader Bugs

Before we delve into the methods of eradication, it is essential to know how to identify crusader bugs. These pests are small, oval-shaped insects that measure about 1/4 inch in length. They have a metallic green or bronze coloration, which makes them easily distinguishable from other garden pests.

The most common signs of crusader bug infestation on a lupine plant include distorted or discolored leaves, stunted growth, and wilting flowers. You may also notice the presence of dark, sticky honeydew on the leaves, which is a telltale sign of these pests.

Natural Predator Introduction

One of the most effective ways to control crusader bug populations is by introducing their natural predators into your garden. Ladybugs, lacewings, and assassin bugs are known to feed on crusader bugs and can help keep their numbers in check.

You can attract these beneficial insects by planting companion plants such as dill, fennel, or yarrow near your lupine plants. Additionally, you can create insect-friendly habitats in your garden by incorporating native plants and providing shelter in the form of rocks or logs.

Manual Removal

If the infestation is not severe, manually removing the crusader bugs can be an effective control method. Put on a pair of gloves and carefully inspect each leaf and stem of your lupine plant. Use your fingers or a pair of tweezers to pick off the bugs and drop them into a bucket of soapy water. This method is time-consuming but can be highly effective in reducing the pest population.

Pruning Infested Parts

If the crusader bug infestation is limited to certain parts of your lupine plant, pruning those sections can help prevent the spread of the pests. Inspect your plant for any leaves or stems that show significant signs of infestation, such as discoloration or distortion. Use sharp pruning shears to remove these affected parts and dispose of them in a sealed bag or container.

After pruning, make sure to clean your pruning tools with rubbing alcohol or a bleach solution to prevent the transmission of any remaining bugs to other plants.

Neem Oil Spray

Neem oil is a natural insecticide derived from the seeds of the neem tree. It is highly effective against a wide range of garden pests, including crusader bugs. To make a neem oil spray, mix one teaspoon of neem oil with one quart of water and a few drops of liquid dish soap.

Fill a spray bottle with the solution and thoroughly spray all parts of your lupine plant, paying extra attention to the undersides of leaves where crusader bugs often hide. Repeat this process every one to two weeks until the infestation is under control.

Companion Planting

Companion planting involves strategically placing certain plants next to each other to benefit both plants in terms of growth and pest control. When it comes to lupine plants, planting garlic, onions, or chives nearby can help repel crusader bugs due to their strong odor.

Additionally, marigolds and nasturtiums are known to act as natural repellents for many garden pests, including crusader bugs. Consider interplanting these flowers with your lupine plants to deter the pests from infesting your garden.

Organic Insecticidal Soap

If all else fails, you can resort to using organic insecticidal soap to control crusader bugs on your lupine plant. These soaps are made from natural ingredients and are safe to use in the garden. Simply mix the recommended amount of insecticidal soap with water according to the product instructions.

Pour the solution into a spray bottle and thoroughly coat all parts of your lupine plant, making sure to cover both sides of the leaves. Organic insecticidal soaps work by suffocating the pests, so it is important to achieve good coverage for maximum effectiveness.

Conclusion

Crusader bugs can wreak havoc on your lupine plants if not dealt with promptly. By identifying these pests early on and implementing appropriate control methods, you can protect your plants and enjoy their beautiful blooms. Whether you opt for natural predators, manual removal, or organic sprays, a combination of these methods can help you effectively get rid of crusader bugs and maintain a healthy lupine plant in your garden.