Updated: June 20, 2023

Fungus can be a common problem for hops plant growers, as it can lead to reduced yield and lower quality hops. However, with the right knowledge and prevention techniques, it is possible to control and eliminate fungus on hops plants. In this article, we will explore some effective methods for getting rid of fungus on hops plants.

Understanding the Types of Fungus

Before we delve into the solutions, it is important to understand the different types of fungus that can affect hops plants. The two most common types are powdery mildew and downy mildew.

Powdery Mildew: Powdery mildew appears as a white, powdery coating on the leaves, stems, and cones of the hops plant. It thrives in warm, dry conditions and can spread rapidly if left untreated.

Downy Mildew: Downy mildew appears as yellow or brown spots on the leaves of the hops plant. It is caused by a water mold and thrives in cool, humid conditions.

Prevention is Key

The best way to deal with fungus on hops plants is to prevent it from occurring in the first place. Here are some preventive measures you can take:

  1. Plant Resistant Varieties: Choose hop varieties that are known for their resistance to fungal diseases. This can greatly reduce the chances of your plants getting infected.

  2. Proper Spacing: Ensure that there is enough space between each hop plant to allow for good air circulation. This will help prevent the build-up of moisture, which is conducive to fungal growth.

  3. Regular Pruning: Prune your hops plants regularly to remove any infected leaves or shoots. This will prevent the spread of the fungus to healthy parts of the plant.

  4. Avoid Overhead Watering: Water your hops plants at the base rather than from above. Overhead watering can create a moist environment that encourages fungal growth. Consider using a drip irrigation system for precise watering.

  5. Clean Tools and Equipment: Sterilize your gardening tools and equipment regularly to prevent the spread of fungal spores. This includes pruning shears, trellis wires, and any other items that come into contact with the plants.

Organic Fungicides

If preventive measures are not sufficient and you notice signs of fungal infection on your hops plants, you may need to use organic fungicides to control the problem. Organic fungicides are a safer alternative to synthetic chemicals and can be effective against many types of fungus.

  1. Sulfur: Sulfur is one of the most common organic fungicides used to control powdery mildew. It works by inhibiting the growth of fungal spores. Apply sulfur-based fungicides according to the manufacturer’s instructions.

  2. Neem Oil: Neem oil is another effective organic fungicide that can control both powdery mildew and downy mildew. It works by disrupting the life cycle of the fungus. Dilute neem oil with water and spray it on the affected parts of the plant.

  3. Baking Soda Solution: A simple homemade remedy for powdery mildew is a baking soda solution. Mix one tablespoon of baking soda with one gallon of water and add a few drops of liquid soap. Spray this solution on the affected parts of the plant every 7-10 days.

  4. Milk Solution: Another natural remedy for powdery mildew is a milk solution. Mix one part milk with nine parts water and spray it on the affected areas of the plant. The proteins in milk have antifungal properties that can help control the fungus.

It is important to note that organic fungicides should be applied early in the morning or late in the evening when temperatures are cooler. This helps to minimize the risk of leaf burn and ensures better efficacy.

Cultural Practices

In addition to preventive measures and organic fungicides, certain cultural practices can also help control and eliminate fungus on hops plants:

  1. Remove Infected Leaves: As soon as you notice signs of fungal infection, remove the affected leaves from the plant. This will reduce the source of spores and prevent further spread.

  2. Proper Trellising: Ensure that your hops plants are properly trellised to allow for good air circulation. This will help reduce humidity levels and discourage fungal growth.

  3. Crop Rotation: Rotate your hops plants with other non-susceptible crops every few years. This can disrupt the life cycle of the fungus and reduce its population in the soil.

  4. Mulching: Apply a layer of organic mulch around the base of the hops plants. This helps to conserve moisture in the soil and prevent splashing of fungal spores onto the leaves.

By implementing these cultural practices along with preventive measures and organic fungicides, you can effectively control and eliminate fungus on hops plants.

Conclusion

Fungus can be a significant threat to hops plants, but with proper prevention techniques and timely intervention, it is possible to keep your plants healthy and productive. Remember to plant resistant varieties, maintain good air circulation, prune regularly, and use organic fungicides when necessary. By taking these steps, you can ensure that your hops plants thrive while minimizing the risk of fungal infections. Happy growing!