Updated: September 17, 2022

Fennel plants are popular among gardeners due to their sweet aroma and licorice-like flavor. However, they are prone to attacks by various pests, among them the crusader bug. These bugs suck sap from the plant, leading to stunted growth and yellowing of leaves. In severe cases, the plant may die. Luckily, there are several ways to get rid of crusader bugs on fennel plants.

Identify Crusader Bugs

Before you can get rid of crusader bugs, you need to identify them. These bugs are small, about 1 cm in length, and have green or brown coloration. They have a long snout that they use to suck sap from the plant. You may also notice yellowing of leaves or stunted growth in affected plants.

Natural Remedies

If you prefer natural remedies, there are several options for getting rid of crusader bugs on fennel plants:

Neem Oil

Neem oil is a natural insecticide that is effective against a wide range of pests, including crusader bugs. Mix two tablespoons of neem oil with a gallon of water and spray the solution on the affected plant every seven days until the infestation clears.

Garlic Spray

Garlic spray is another effective natural remedy for crusader bugs. Crush six cloves of garlic and add them to a quart of water. Let the mixture sit overnight, then strain it through a cheesecloth. Add a teaspoon of dish soap and spray the solution on the affected plant every three days until the infestation clears.

Companion Planting

Companion planting involves planting certain types of plants near each other to repel pests. In this case, planting dill, basil or marigold near fennel plants may help repel crusader bugs.

Chemical Remedies

If natural remedies do not work, you can resort to chemical remedies. However, it is important to use chemicals sparingly and follow the manufacturer’s instructions carefully to avoid harming the environment or beneficial insects. Some effective chemical remedies for crusader bugs include:

Pyrethrin

Pyrethrin is a natural insecticide that is derived from chrysanthemums. It is safe to use on fennel plants and will kill crusader bugs on contact. However, it breaks down quickly, so it needs to be reapplied every seven days until the infestation clears.

Spinosad

Spinosad is a chemical insecticide that is effective against a wide range of pests, including crusader bugs. It is derived from naturally occurring soil bacteria and is safe to use on fennel plants. However, it may harm beneficial insects such as bees, so use it sparingly.

Preventing Crusader Bug Infestations

Prevention is better than cure when it comes to pest control. Here are some tips for preventing crusader bug infestations:

  • Inspect your fennel plants regularly for signs of infestation.
  • Keep your garden clean and free of debris, which can harbor pests.
  • Water your plants regularly, as stressed plants are more susceptible to pests.
  • Rotate your crops every season to prevent the buildup of pests in the soil.
  • Use row covers to protect your plants from pests.

FAQ

What Are Crusader Bugs?

Crusader bugs are small insects that suck sap from plants, leading to stunted growth and yellowing of leaves.

What Do Crusader Bugs Look Like?

Crusader bugs are about 1 cm in length and have green or brown coloration. They have a long snout that they use to suck sap from the plant.

How Do I Get Rid of Crusader Bugs?

You can get rid of crusader bugs on fennel plants using natural remedies such as neem oil and garlic spray, or chemical remedies such as pyrethrin and spinosad. It is also important to inspect your plants regularly, keep your garden clean and free of debris, and water your plants regularly to prevent stress.

How Do I Prevent Crusader Bug Infestations?

You can prevent crusader bug infestations by inspecting your plants regularly, keeping your garden clean, rotating your crops, and using row covers to protect your plants from pests.