How To Get Rid Of Boxwood Caterpillars

You can get rid of boxwood caterpillars using several effective methods that target both the caterpillars and their eggs.
 
If you’ve spotted chewed leaves and webbing on your boxwoods, you’re likely dealing with boxwood caterpillars.
 
Getting rid of boxwood caterpillars early is key to saving your shrubs from serious damage.
 
In this post, we’ll walk through the best ways to get rid of boxwood caterpillars naturally and chemically.
 
Let’s dive into how to get rid of boxwood caterpillars for good.
 

How to Get Rid of Boxwood Caterpillars Effectively

The first step to get rid of boxwood caterpillars is identifying the problem early.
 
Boxwood caterpillars are the larvae of the box tree moth, and they feed voraciously on boxwood leaves.
 
Here are the most effective methods to get rid of boxwood caterpillars:
 

1. Manual Removal of Boxwood Caterpillars

One of the simplest ways to get rid of boxwood caterpillars is to pick them off by hand.
 
Wear gloves and inspect your boxwood shrubs closely, especially on the undersides of leaves.
 
Drop any boxwood caterpillars you find into a bucket of soapy water to kill them.
 
This method works best for small infestations and helps you get rid of boxwood caterpillars without chemicals.
 

2. Prune Infested Branches

Pruning heavily infested branches is another direct way to get rid of boxwood caterpillars.
 
Cut off branches where you see webbing, eggs, or clusters of boxwood caterpillars.
 
Dispose of the pruned material in sealed bags and throw it in the trash.
 
This prevents the boxwood caterpillars from spreading to other parts of your garden.
 

3. Use a Strong Water Spray

A blast of water from your garden hose can dislodge boxwood caterpillars from the leaves.
 
Direct the spray at the affected areas to knock off both caterpillars and eggs.
 
This method won’t kill them completely, but it helps reduce their numbers while you get rid of boxwood caterpillars with other treatments.
 

Natural Solutions to Get Rid of Boxwood Caterpillars

If you prefer eco-friendly options, you can get rid of boxwood caterpillars using natural products.
 
These methods are safe for beneficial insects and pets when used correctly.
 

1. Bacillus thuringiensis (Bt)

Bt is a naturally occurring bacteria that targets caterpillars specifically.
 
Spray Bt on your boxwoods as soon as you see boxwood caterpillars.
 
The caterpillars eat the bacteria and stop feeding within a few days.
 
This is one of the most effective natural ways to get rid of boxwood caterpillars.
 

2. Neem Oil Spray

Neem oil disrupts the life cycle of boxwood caterpillars and repels adult moths.
 
Mix neem oil with water and a few drops of dish soap, then spray thoroughly.
 
Apply every 7–10 days to keep boxwood caterpillars under control.
 
Neem oil helps you get rid of boxwood caterpillars without harsh chemicals.
 

3. Diatomaceous Earth

Sprinkle food-grade diatomaceous earth around the base of your boxwoods.
 
When boxwood caterpillars crawl through it, the sharp particles damage their exoskeletons.
 
Reapply after rain or watering to maintain effectiveness.
 
This is a dry method to help get rid of boxwood caterpillars as they move.
 

Chemical Treatments to Get Rid of Boxwood Caterpillars

For severe infestations, you may need stronger products to get rid of boxwood caterpillars quickly.
 
Always follow label instructions and protect pollinators by spraying at dusk.
 

1. Insecticidal Soap

Insecticidal soap dehydrates boxwood caterpillars on contact.
 
Spray directly on the caterpillars for best results.
 
Repeat applications every few days until you see no more boxwood caterpillars.
 

2. Pyrethrin-Based Sprays

Pyrethrin is a plant-derived insecticide that quickly kills boxwood caterpillars.
 
It has low persistence, so it breaks down rapidly in the environment.
 
Use it as a spot treatment to get rid of boxwood caterpillars without harming nearby plants.
 

3. Systemic Insecticides

Systemic products are absorbed by the boxwood and poison boxwood caterpillars when they feed.
 
These are best used in early spring before the caterpillars become active.
 
Apply as a soil drench or foliar spray according to the product directions.
 

When to Take Action Against Boxwood Caterpillars

Timing is crucial when you want to get rid of boxwood caterpillars effectively.
 
Start inspecting your boxwoods in early spring as soon as temperatures rise.
 
The moths lay eggs that hatch into boxwood caterpillars in late spring and summer.
 
Act immediately when you see the first signs of damage to prevent a full outbreak.
 

1. Monitor Regularly

Check your boxwoods weekly during the growing season.
 
Look for small green caterpillars, webbing, and eaten leaf edges.
 
Early detection makes it much easier to get rid of boxwood caterpillars.
 

2. Treat During Larvae Stages

Boxwood caterpillars are easiest to kill when they are young and small.
 
Young caterpillars are more susceptible to natural sprays like Bt.
 
Older boxwood caterpillars may require stronger chemical methods.
 

3. Repeat Treatments as Needed

Boxwood caterpillars can have multiple generations in one season.
 
Don’t assume one treatment is enough — monitor and reapply to get rid of boxwood caterpillars completely.
 

So, How to Get Rid of Boxwood Caterpillars?

You can get rid of boxwood caterpillars using several effective methods that target both the caterpillars and their eggs.
 
Start with manual removal and natural sprays like Bt or neem oil for light infestations.
 
For heavy damage, use insecticidal soap or pyrethrin to get rid of boxwood caterpillars fast.
 
Whatever method you choose, act early and stay consistent.
 
That’s how to get rid of boxwood caterpillars and keep your boxwoods healthy all season long.