How to Get Rid of Borers on Hydrangeas Plant

Hydrangeas are known for their beautiful blooms and lush foliage, making them a popular choice among gardeners. However, one common problem that can plague hydrangea plants is the presence of borers. These pests can cause significant damage to the plant if left untreated. In this article, we will discuss what borers are, how to identify their presence, and most importantly, how to get rid of them.

What are Borers?

Borers are a type of insect larvae that tunnel into the stems or trunks of plants. They feed on the plant tissue, causing damage to the vascular system and weakening the overall health of the plant. While there are many different types of borers that can affect various plants, the most common borer species that attack hydrangeas are the lilac borer and the dogwood borer.

Identifying Borer Damage

The first step in getting rid of borers on your hydrangea plants is to identify their presence. Look for signs such as wilting or drooping leaves, yellowing or browning foliage, and weak or stunted growth. You may also notice holes or sawdust-like frass near the base of the plant, which are indicative of borer activity.

To confirm the presence of borers, gently scrape away a small portion of bark near the affected area. If you see tunnels or galleries in the wood, it is a clear indication that borers have infested your hydrangea plant.

Prevention is Key

As with any pest problem, prevention is always better than cure. There are several steps you can take to reduce the risk of borer infestation in your hydrangeas.

1. Choose Healthy Plants: When purchasing hydrangea plants, ensure that they are healthy and free from any signs of pests or diseases. Avoid plants with wilted or yellowing leaves, as these may already be infested.

2. Plant in Optimal Conditions: Hydrangeas thrive in well-draining soil and prefer partial shade. Make sure to provide them with the right growing conditions to keep them healthy and less susceptible to pests.

3. Prune Regularly: Regular pruning not only helps maintain the shape and size of your hydrangea plant but also allows air circulation, reducing the risk of borer infestation. Remove any dead or diseased branches promptly.

4. Monitor for Signs of Infestation: Regularly inspect your hydrangeas for any signs of borer activity. Catching the problem early can prevent further damage and make treatment easier.

Getting Rid of Borers

If you have identified borer damage on your hydrangea plants, it is crucial to take immediate action to eliminate them. Here are a few effective methods to get rid of borers:

1. Manual Removal: For small infestations, you can manually remove the borers from the plant. Carefully cut out the affected stems or branches using clean pruning shears or a knife. Make sure to remove a few inches below the damaged area to ensure complete removal of the borers.

2. Insecticidal Soap: Insecticidal soaps are effective in controlling soft-bodied insects like borers. Dilute the soap according to the instructions on the label and spray it onto the affected areas of the hydrangea plant. Repeat this process every 7-10 days until the borers are eradicated.

3. Beneficial Nematodes: Beneficial nematodes are microscopic worms that feed on insect larvae, including borers. They can be applied to the soil around the base of the hydrangea plant. Follow the instructions on the packaging for proper application and timing.

4. Chemical Insecticides: If the infestation is severe and other methods have failed, you may need to resort to chemical insecticides. Look for a product specifically labeled for borer control on hydrangeas and follow the instructions carefully. It is important to note that chemical insecticides should be used as a last resort and with caution, as they can harm beneficial insects and pollinators.

Aftercare

After treating your hydrangea plants for borers, it is crucial to provide proper aftercare to ensure their recovery and prevent future infestations. Here are a few steps to follow:

1. Watering: Proper watering is essential for the health of your hydrangeas. Provide adequate moisture without overwatering, as excessive moisture can create favorable conditions for pests.

2. Fertilizing: Apply a balanced fertilizer formulated for hydrangeas to promote healthy growth and strengthen the plant’s natural defenses against pests.

3. Mulching: Apply a layer of organic mulch around the base of the plant to conserve moisture, suppress weeds, and insulate the roots. However, make sure not to pile mulch against the stem, as it can create a moist environment that attracts pests.

4. Regular Inspection: Continue monitoring your hydrangeas regularly for any signs of reinfestation or new pest problems. Early detection can help prevent major damage.

By following these preventive measures and taking prompt action at the first sign of borer infestation, you can keep your hydrangea plants healthy and free from these destructive pests. Remember, a little vigilance goes a long way in maintaining the beauty and vitality of your garden.