Updated: May 3, 2024

Black mulberry trees are a popular choice for home gardeners due to their delicious fruit and beautiful foliage. However, these trees can sometimes fall victim to infestations of beetles, which can damage the leaves and fruit if left unchecked. If you’ve noticed beetles on your black mulberry tree and want to get rid of them, there are several steps you can take to protect your tree and ensure a healthy harvest.

Identifying the Culprits

Before you can effectively address the beetle infestation on your black mulberry tree, it’s important to first identify the specific type of beetle that is causing the damage. Common beetles that are known to feed on mulberry trees include Japanese beetles, June beetles, and rose chafers.

Japanese beetles are metallic green with coppery-brown wing covers and are about half an inch long. They feed on the leaves of trees and shrubs, skeletonizing the foliage by consuming the tissue between the veins.

June beetles, also known as June bugs or May beetles, are larger beetles that are brown or black in color. They feed on the leaves of trees and plants as adults and lay eggs in the soil, where larvae feed on plant roots.

Rose chafers are tan-colored beetles that feed on the flowers and foliage of many plants, including mulberry trees. They can quickly defoliate a tree if left unchecked.

Non-Chemical Control Methods

If you prefer to avoid using chemical pesticides on your black mulberry tree, there are several non-chemical control methods you can try to combat beetle infestations. These methods include:

Handpicking

Inspect your black mulberry tree regularly and handpick any beetles you find. Drop them into a bucket of soapy water to prevent them from returning to the tree.

Neem Oil

Neem oil is a natural insecticide that can be effective against a variety of pests, including beetles. Mix neem oil with water according to the manufacturer’s instructions and spray it on the tree’s foliage.

Beneficial Insects

Introduce beneficial insects such as ladybugs or lacewings to your garden. These insects are natural predators of many beetle species and can help keep the population in check.

Row Covers

Covering your black mulberry tree with row covers can prevent adult beetles from reaching the foliage and laying eggs. Be sure to secure the covers tightly to prevent any gaps where beetles could enter.

Chemical Control Methods

If non-chemical control methods are not effective in managing the beetle infestation on your black mulberry tree, you may need to resort to chemical pesticides. When using chemical pesticides, it’s important to follow all safety precautions and application instructions provided by the manufacturer. Consider the following chemical control options:

Insecticidal Soap

Insecticidal soap is a low-toxicity pesticide that can be effective against soft-bodied insects like beetles. Spray insecticidal soap directly onto the foliage of your black mulberry tree, making sure to cover all affected areas.

Pyrethrin-Based Insecticides

Pyrethrin-based insecticides are derived from chrysanthemum flowers and can be effective against a wide range of pests, including beetles. Follow the manufacturer’s instructions for application rates and frequency.

Systemic Insecticides

Systemic insecticides are absorbed by the plant’s tissues and provide long-lasting protection against pests like beetles. These products are typically applied as a soil drench or injected directly into the tree’s trunk.

Preventing Future Infestations

Once you’ve successfully eradicated the beetle infestation on your black mulberry tree, it’s important to take steps to prevent future infestations from occurring. Consider implementing the following preventative measures:

  • Regular Pruning: Prune your black mulberry tree regularly to remove dead or damaged branches where beetles may lay eggs.
  • Mulch: Apply a layer of mulch around the base of your tree to help retain moisture and discourage pests.
  • Healthy Soil: Ensure your tree is planted in healthy soil with proper drainage to promote strong root growth.
  • Monitor: Keep a close eye on your black mulberry tree for signs of beetle activity and take action at the first sign of an infestation.

By following these tips for identifying, controlling, and preventing beetle infestations on your black mulberry tree, you can help protect your tree and enjoy a bountiful harvest of delicious fruit for years to come. Remember that persistence is key when dealing with pest issues in your garden, so stay vigilant and proactive in your efforts to maintain a healthy and thriving mulberry tree.