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How to Get Rid of Crusader Bugs on Emerald Gem Plant

Updated: March 29, 2022

Emerald Gem, a species of magnolia, is a popular ornamental plant, known for its glossy leaves and fragrant flowers. However, it is also vulnerable to attack by a pesky insect called the Crusader bug. These bugs feed on the sap of the plant, which weakens it and can even kill it if left untreated. If you have an Emerald Gem plant that is infested with Crusader bugs, don’t worry, there are several ways to get rid of them.

Identify the Crusader Bug

Before you start treatment, it’s important to make sure that you’re dealing with Crusader bugs. These bugs have a distinct appearance, so they are easy to spot. They are about 1 cm long and have a bright red body with black spots. They also have long antennae and protruding mouthparts. If you’re not sure whether you have Crusader bugs or not, take a close look at your plant’s leaves and stems.

Natural Remedies

If you prefer natural remedies over chemical ones, there are several options available to get rid of Crusader bugs.

Soap and Water

One easy way to get rid of Crusader bugs is to spray your plants with a mixture of water and dish soap. Mix one tablespoon of dish soap with one quart of water and spray it directly onto the affected areas of your plant. This will suffocate the bugs and prevent them from reproducing.

Neem Oil

Neem oil is an organic insecticide that is effective against a wide range of pests, including Crusader bugs. Mix one tablespoon of neem oil with one quart of water and spray it onto your plants. This will repel the bugs and prevent them from feeding on your plant.

Garlic Spray

Garlic spray is another effective natural remedy for getting rid of Crusader bugs. Crush a few garlic cloves and mix them with water. Let the mixture sit for a few hours, then strain it and pour it into a spray bottle. Spray the mixture onto your plants, making sure to cover all the affected areas.

Chemical Remedies

If natural remedies are not effective, you may need to resort to chemical treatments to get rid of Crusader bugs. There are several options available, but make sure to read the label carefully before using any chemical products.

Insecticidal Soap

Insecticidal soap is a type of insecticide that is made from natural ingredients such as fatty acids and potassium salts. It is safe to use on most plants, including Emerald Gem. Follow the instructions on the label carefully and apply the soap directly onto the affected parts of your plant.

Pyrethrin-based Insecticides

Pyrethrin-based insecticides are another option for getting rid of Crusader bugs. They work by targeting the nervous system of the bugs, causing paralysis and death. These insecticides are effective against a wide range of pests, including Crusader bugs. However, they can be harmful to beneficial insects such as bees and butterflies, so use them with caution.


Prevention is always better than cure when it comes to pest control. Here are some tips to prevent Crusader bugs from infesting your Emerald Gem plant:

  • Avoid over-fertilizing your plant, as this can attract pests.
  • Keep your plant well-watered and healthy, as healthy plants are less vulnerable to pests.
  • Inspect your plant regularly for signs of infestation, so you can catch it early before it spreads.
  • Clean up fallen leaves and debris around your plant, as these can harbor pests.


Are Crusader bugs harmful to humans?

No, Crusader bugs are not harmful to humans. They do not bite or sting, and they are not known to transmit diseases.

How do I know if my plant is infested with Crusader bugs?

Look for signs such as wilting leaves, yellowing or browning of leaves, and the presence of bugs on the plant.

Can I use natural remedies and chemical treatments together?

No, it’s not recommended to use natural remedies and chemical treatments together, as this can be harmful to your plant. Choose one method and stick to it.

How often should I treat my plant for Crusader bugs?

Treat your plant as soon as you notice signs of infestation, and repeat the treatment every 7-10 days until the bugs are gone.