Updated: July 20, 2023

Crusader bugs, also known as stink bugs, can be a nuisance for raspberry plant growers. These small insects feed on the sap of plants and can cause damage to the leaves and fruits of raspberry plants. If left untreated, a crusader bug infestation can lead to reduced plant health and decreased fruit yield. However, there are several steps you can take to effectively get rid of crusader bugs on your raspberry plants.

Identify the Crusader Bugs

Before you can effectively eliminate crusader bugs from your raspberry plants, it is important to correctly identify them. Crusader bugs are small insects with shield-shaped bodies and distinctive markings. They vary in color from green to brown and emit a strong odor when disturbed. By familiarizing yourself with the appearance of these bugs, you can quickly distinguish them from other pests and take appropriate action.

Manual Removal

One of the first steps to take in controlling crusader bugs is to manually remove them from your raspberry plants. This can be done by using a pair of gloves or tweezers to carefully pick off the bugs from the leaves and stems. Place the bugs in a bucket of soapy water to prevent them from escaping or returning to the plants. While manual removal may be time-consuming, it can significantly reduce the number of crusader bugs present on your raspberry plants.

Natural Predators

Introducing natural predators into your garden can be an effective way to control crusader bug populations. Ladybugs, lacewings, and parasitic wasps are all natural enemies of crusader bugs and can help keep their numbers in check. You can attract these beneficial insects to your garden by planting flowers such as marigolds, daisies, and yarrow. Additionally, avoiding the use of broad-spectrum insecticides will prevent harm to these natural predators.

Neem Oil Spray

Neem oil is a natural insecticide derived from the neem tree. It is an effective and safe option for controlling crusader bugs on raspberry plants. Neem oil works by disrupting the feeding and reproductive behavior of insects, ultimately leading to their demise. To make a neem oil spray, mix 1-2 tablespoons of neem oil with a gallon of water and a few drops of dish soap. Spray this solution onto your raspberry plants, focusing on the leaves and stems where the bugs are most likely to be found. Repeat this process every 7-10 days until the infestation is under control.

Insecticidal Soap

Another option for controlling crusader bugs is to use an insecticidal soap. This type of soap is specially formulated to kill soft-bodied insects like crusader bugs by suffocating them. To make an insecticidal soap spray, mix 2-3 tablespoons of liquid soap (such as castile soap or dish soap) with a gallon of water. Spray the solution onto your raspberry plants, ensuring complete coverage of the leaves and stems. Be sure to avoid spraying during hot, sunny periods as this can cause damage to the plants. Repeat the application every 5-7 days until the crusader bug infestation is eliminated.

Cultural Practices

Implementing certain cultural practices can help prevent crusader bug infestations in the first place. Regularly inspect your raspberry plants for signs of pests and take immediate action if any are found. Keeping your garden clean and free from debris can also discourage the bugs from taking up residence in your plants. Pruning any damaged or overcrowded branches will improve air circulation and reduce hiding places for pests. Additionally, providing adequate water, sunlight, and nutrients will promote plant health and make them more resistant to crusader bug attacks.

Conclusion

Crusader bugs can be a frustrating problem for raspberry plant growers, but with the right techniques, they can be effectively controlled. By correctly identifying these pests, manually removing them, introducing natural predators, and using organic insecticides such as neem oil or insecticidal soap, you can eliminate crusader bugs from your raspberry plants. Implementing cultural practices that promote plant health and prevent infestations will also help keep these pests at bay. With a combination of these methods, you can ensure the continued health and productivity of your raspberry plants.