Updated: July 12, 2023

Lilac plants are prized for their beautiful blossoms and delightful fragrance, but they can sometimes fall victim to unwanted pests. One such pest is the crusader bug (also known as the lilac bug or the false chinch bug). These tiny insects feed on the sap of lilac plants, causing damage to the leaves and hindering their growth. If you’ve noticed crusader bugs infesting your lilac plant, don’t worry! There are several steps you can take to get rid of them and protect your beloved plant.

Identification of Crusader Bugs

Before you start combating crusader bugs, it’s important to correctly identify them. Crusader bugs are small insects, about a quarter-inch in length, with a slender body and elongated wings. They are usually brownish-gray or tan in color with distinctive markings on their back. When disturbed, crusader bugs emit a strong odor which can be unpleasant.

Prevention is Key

The best way to deal with crusader bugs is to prevent them from infesting your lilac plant in the first place. Here are some preventive measures you can take:

  1. Regular Inspection: Regularly inspect your lilac plant for signs of crusader bugs. Look for clusters of tiny insects on the undersides of leaves or on the stems.

  2. Remove Weeds: Clear away any weeds or grass around the base of your lilac plant. These can serve as hiding spots or breeding grounds for crusader bugs.

  3. Prune Regularly: Keep your lilac plant pruned to allow for better air circulation and reduce the risk of infestations.

  4. Avoid Over-Fertilization: Over-fertilizing your lilac plant can make it more attractive to pests like crusader bugs. Follow the recommended fertilization guidelines for lilacs.

  5. Plant Companion Plants: Some plants, such as marigolds, lavender, and catnip, are known to repel crusader bugs. Consider planting these companion plants near your lilac to deter the pests.

Natural Remedies for Crusader Bugs

If you’ve already noticed crusader bugs on your lilac plant, there are several natural remedies you can try before resorting to chemical solutions. Here are some effective methods:

  1. Handpicking: Inspect your lilac plant and manually remove any crusader bugs you find. Drop them into a bucket of soapy water to prevent them from returning.

  2. Neem Oil: Neem oil is a natural insecticide that can be effective against crusader bugs. Mix neem oil with water according to the instructions on the packaging and spray it on the affected areas of your lilac plant.

  3. Diatomaceous Earth: Sprinkle food-grade diatomaceous earth around the base of your lilac plant. This powdery substance is made from fossilized remains of diatoms and acts as a natural pesticide by dehydrating insects.

  4. Soap Spray: Create a homemade soap spray by mixing a few drops of dish soap with water in a spray bottle. Spray this mixture on the crusader bugs to suffocate and kill them.

Chemical Solutions for Severe Infestations

If natural remedies fail to control the crusader bug population on your lilac plant, you may need to resort to chemical solutions. It’s important to note that chemical pesticides should be used as a last resort and with caution. Here are some options:

  1. Insecticidal Soap: Look for an insecticidal soap specifically formulated for use on ornamental plants. Follow the instructions on the label for application and dosage.

  2. Pyrethrin-Based Insecticides: Pyrethrin-based insecticides are effective against crusader bugs. However, they can also harm beneficial insects, so use them sparingly and avoid spraying during times when bees and other pollinators are active.

  3. Consult a Professional: If the infestation persists despite your efforts, it may be best to consult a professional pest control service. They can provide targeted treatments to eliminate crusader bugs while minimizing harm to your lilac plant.

Conclusion

Dealing with crusader bugs on your lilac plant can be frustrating, but with the right approach, you can successfully get rid of them. Start by implementing preventive measures to keep your lilac plant healthy and unattractive to these pests. If an infestation occurs, try natural remedies first before considering chemical solutions. Remember to use pesticides responsibly and always follow the instructions on the label. With patience and persistence, you can protect your lilac plant from crusader bugs and enjoy its beauty for years to come.