Updated: July 18, 2023

Mulberry plants are beloved by many gardeners for their delicious fruits and beautiful foliage. However, these plants are often plagued by caterpillars that can cause significant damage if left uncontrolled. If you’re struggling with caterpillar infestation on your mulberry plants, fear not! In this article, we will discuss effective methods to get rid of caterpillars and protect your mulberry plants.

Identifying the Culprits: Common Caterpillar Pests

Before we dive into the solutions, it’s important to identify the common caterpillar pests that are likely infesting your mulberry plants. The two most common culprits are the White-Marked Tussock Moth caterpillar and the Mulberry Silk Moth caterpillar.

The White-Marked Tussock Moth caterpillar is easily recognized by its black body covered in white tufts and a distinctive row of red warts along its back. On the other hand, the Mulberry Silk Moth caterpillar has a more uniform appearance with a green body and black dots.

Natural Methods to Control Caterpillars

When it comes to dealing with caterpillars on your mulberry plants, it’s always best to start with natural methods before resorting to chemical pesticides. Here are some effective techniques you can try:

1. Handpicking

One of the simplest and most effective ways to control caterpillars is by handpicking them off your mulberry plants. Wear gloves and carefully inspect the leaves, stems, and branches for any caterpillars you can find. Drop them into a bucket of soapy water or squash them to prevent them from returning.

2. Attract Natural Predators

Encouraging natural predators like birds, ladybugs, lacewings, and wasps in your garden can help control caterpillar populations naturally. Planting nectar-rich flowers, such as marigolds and zinnias, will attract these beneficial insects to your garden. Additionally, you can install bird feeders and birdhouses to attract birds that feed on caterpillars.

3. Homemade Insecticidal Soap

Insecticidal soap is an effective and environmentally friendly option for controlling caterpillars. To make your own insecticidal soap, mix 1 tablespoon of liquid dish soap with 1 quart of water. Spray the solution directly onto the caterpillars, ensuring complete coverage. Repeat every few days until the infestation is under control.

4. Neem Oil

Neem oil is a natural insecticide derived from the neem tree. It works by disrupting the feeding and reproduction of caterpillars. Dilute neem oil according to the manufacturer’s instructions and spray it onto your mulberry plants, paying close attention to the areas where caterpillars are most active. Repeat every 7-14 days until the infestation is resolved.

Chemical Control Options

If natural methods fail to fully eliminate the caterpillar infestation, you may need to resort to chemical control options. However, it’s important to use these products responsibly and follow all safety precautions:

1. Bacillus thuringiensis (Bt)

Bacillus thuringiensis (Bt) is a naturally occurring bacteria that specifically targets caterpillars. It disrupts their digestive system, causing them to stop feeding and eventually die. Bt products are available in liquid or powder form and can be sprayed directly onto the leaves of your mulberry plants. Follow the instructions on the product label for proper application.

2. Chemical Insecticides

If all else fails, chemical insecticides can be used as a last resort. Look for insecticides specifically labeled for caterpillar control and follow the instructions carefully. Apply the insecticide during the early morning or late evening when caterpillars are most active. Be sure to protect yourself by wearing appropriate protective clothing and avoid spraying during windy conditions.

Preventative Measures

Preventing caterpillar infestations in the first place is always better than having to deal with them later. Here are some preventative measures to keep your mulberry plants caterpillar-free:

  • Regularly prune your mulberry plants to remove any dead or damaged branches.
  • Clean up fallen leaves and debris around your plants to eliminate potential hiding spots for caterpillars.
  • Use floating row covers to physically block adult moths from laying eggs on your plants.
  • Monitor your mulberry plants regularly for signs of caterpillar activity and take action at the first sight of an infestation.

Conclusion

Caterpillars can pose a threat to the health and productivity of your mulberry plants. By using a combination of natural control methods, such as handpicking, attracting natural predators, and using homemade insecticidal soap or neem oil, you can effectively manage caterpillar infestations. If natural methods fail, consider using Bacillus thuringiensis (Bt) or chemical insecticides as a last resort. Lastly, implementing preventative measures can help reduce the likelihood of future infestations. With these strategies in place, you can enjoy healthy and thriving mulberry plants for years to come.