How to Get Rid of Crusader Bugs on Hops Plant

Crusader bugs, also known as marmorated stink bugs, are a common pest that can cause significant damage to hops plants. These bugs feed on the sap of the plant, resulting in wilting, yellowing, and distorted leaves. If left unchecked, crusader bugs can seriously impact the health and productivity of your hops crop. In this article, we will explore effective methods to get rid of crusader bugs on hops plants.

Identify the Problem

The first step in dealing with crusader bugs is to accurately identify the problem. Crusader bugs are brownish-gray insects with a distinctive shield-shaped body. They have a strong odor when crushed and are known for their ability to emit a foul smell as a defense mechanism. Look for these bugs on the leaves, stems, and flowers of your hops plants.

Natural Predators

One of the most effective ways to control crusader bugs is by encouraging natural predators in your garden. Many insects and birds feed on these pests and can help keep their population in check. Ladybugs, lacewings, spiders, and birds such as swallows and bluebirds are known to be voracious crusader bug predators.

To attract these beneficial insects and birds to your garden, create a diverse habitat with plenty of flowering plants. Planting flowers such as marigolds, daisies, and yarrow can provide nectar and pollen sources for these natural predators. Additionally, consider installing birdhouses or providing bird feeders to attract insect-eating birds.

Manual Removal

If you notice only a few crusader bugs on your hops plants, you can try manually removing them. Wear gloves and carefully pick off the bugs from the plant. Drop them into a bucket of soapy water to kill them. This method is best suited for smaller infestations or when you spot individual bugs.

Sticky Traps

Sticky traps are another effective tool for controlling crusader bugs. These traps are designed to attract and catch insects. Hang them near your hops plants to capture the bugs before they can cause significant damage. Make sure to regularly check and replace the traps as they become filled with pests.

Neem Oil

Neem oil is a natural insecticide that can be used to control crusader bugs on hops plants. It works by disrupting the bug’s feeding and reproductive mechanisms, effectively reducing their population. Mix neem oil with water according to the instructions on the product label and spray it onto the leaves, stems, and flowers of your hops plants. Repeat the application every 7-14 days or as needed.

Insecticidal Soap

Insecticidal soap is another organic option for controlling crusader bugs. This soap is specially formulated to kill soft-bodied insects like crusader bugs while being safe for plants. Dilute insecticidal soap according to the instructions on the product label and apply it to the affected parts of your hops plants. Be sure to cover both sides of the leaves, as crusader bugs often hide on the undersides.

Beneficial Nematodes

Beneficial nematodes are microscopic organisms that can help control crusader bugs in the soil. These tiny worms seek out and parasitize the larvae of crusader bugs, effectively reducing their numbers. To use beneficial nematodes, mix them with water according to package instructions and apply the solution to the soil around your hops plants. This method is best applied in early spring or late fall when the soil temperature is between 50-90°F (10-32°C).

Crop Rotation

Practicing crop rotation can help reduce crusader bug infestations in your hops plants. These pests often overwinter in nearby vegetation such as weeds or other crops. By rotating your hops with unrelated crops, you can disrupt their life cycle and minimize the risk of reinfestation. Choose crops that are not preferred by crusader bugs, such as grains or legumes, for rotation.

Conclusion

Dealing with crusader bugs on hops plants requires a combination of methods to effectively control their population. By identifying the problem, attracting natural predators, using sticky traps, employing organic insecticides like neem oil and insecticidal soap, introducing beneficial nematodes, practicing crop rotation, and maintaining good garden hygiene, you can successfully rid your hops plants of these destructive pests. Remember to monitor your plants regularly for signs of infestation and take action promptly to protect your hops crop.