Updated: July 16, 2023

The Veronica plant, also known as Speedwell, is a beautiful perennial flower that adds vibrant colors to gardens and landscapes. However, like any other plant, Veronicas are susceptible to pest infestations. One common pest that can wreak havoc on these plants is the Crusader bug (Miris striatus). These small insects feed on the sap of the Veronica plant, causing damage to the leaves and stems. If left untreated, a Crusader bug infestation can weaken and even kill the plant. In this article, we will discuss effective methods to get rid of Crusader bugs on Veronica plants.

Identifying Crusader Bugs

Before we delve into the various methods of pest control, it’s important to be able to identify Crusader bugs on your Veronica plants. These bugs are about 1 cm long and have a distinctive shield-like shape with brown or green coloring. They have long antennae and piercing-sucking mouthparts. You may also notice small black dots, which are their fecal droppings, on the leaves of the affected plants.

Natural Methods of Control

When dealing with any pest infestation, it is always best to start with natural methods of control before resorting to chemical treatments. Here are some effective natural ways to get rid of Crusader bugs on Veronica plants:

1. Manual Removal

If you only have a few Crusader bugs on your Veronica plant, manually removing them can be an effective method. Wear gloves and carefully pick off the bugs from the plant using your fingers or use a pair of tweezers. Make sure to dispose of them properly to prevent reinfestation.

2. Neem Oil Spray

Neem oil is a natural insecticide derived from the seeds of the neem tree. It has insecticidal properties that repel and kill a wide range of pests, including Crusader bugs. Mix neem oil with water according to the manufacturer’s instructions and spray it on the affected parts of the Veronica plant. Repeat this process every two weeks until the infestation is under control.

3. Insecticidal Soap

Insecticidal soap is another effective natural remedy for controlling Crusader bugs. It works by suffocating the insects and disrupting their cellular membranes. Dilute insecticidal soap with water according to the instructions on the label and spray it on the affected plants. Be sure to cover both sides of the leaves thoroughly. Repeat this process every week or as needed.

4. Beneficial Insects

Introducing beneficial insects into your garden can help control Crusader bug populations naturally. Ladybugs and lacewings are natural predators of many garden pests, including Crusader bugs. You can attract these beneficial insects by planting flowers such as daisies, dill, and yarrow, which serve as nectar and pollen sources for them. Additionally, you can purchase ladybugs or lacewings from garden centers and release them onto your Veronica plants.

Chemical Control

If the infestation persists or becomes severe, despite using natural methods of control, you may need to resort to chemical treatments. It’s important to note that chemical pesticides should be used as a last resort, as they can harm beneficial insects and have negative effects on the environment. If you decide to use chemical control methods, follow these guidelines:

1. Choose the Right Insecticide

Select an insecticide that specifically targets piercing-sucking insects like Crusader bugs. Look for active ingredients such as pyrethrin, bifenthrin, or cyfluthrin. Always read the label carefully and follow the instructions regarding dosage and application.

2. Apply at the Right Time

Apply the insecticide when Crusader bugs are most vulnerable, usually during their nymph stage. This is when they are more susceptible to control measures. Follow the label instructions for the appropriate timing of application.

3. Apply with Caution

When applying chemical insecticides, take precautions to protect yourself and the environment. Wear protective clothing, gloves, and a face mask. Avoid spraying on windy days to prevent drift and keep children and pets away from the treated area.

4. Monitor and Repeat Applications

After applying the insecticide, monitor the Veronica plants closely for any signs of reinfestation. If necessary, repeat the treatment according to the manufacturer’s instructions or as recommended by a gardening professional.

Prevention is Key

The best way to deal with Crusader bugs on Veronica plants is to prevent infestations in the first place. Here are some preventive measures you can take:

  • Regular inspection: Regularly inspect your Veronica plants for any signs of pest infestation. Catching the problem early can help prevent it from spreading.

  • Plant selection: Choose Veronica plant varieties that are known to be resistant to Crusader bugs.

  • Proper maintenance: Keep your garden clean and tidy by removing weeds, fallen leaves, and debris that may attract pests.

  • Diverse planting: Plant a variety of flowers and herbs in your garden to attract beneficial insects that control pest populations naturally.

By following these preventive measures and using effective control methods, you can keep your Veronica plants healthy and free from Crusader bugs. Remember, a proactive approach is always better than trying to tackle a full-blown infestation.