How to get rid of Bagworms

How to Get Rid of Bagworms (Complete 2026 Guide for Maryland Homeowners)If you’re dealing with damaged trees or shrubs, you may be facing a bagworm infestation. Here’s the quick answer:
The best way to get rid of bagworms is to hand-pick them in winter or early spring, or use insecticides like Bacillus thuringiensis (Bt) or spinosad in late spring when larvae are active.
Bagworms can quickly destroy evergreens and ornamental plants if left untreated. In this complete guide, you’ll learn how to identify, treat, and prevent bagworms in Maryland landscapes.

🐛 What Are Bagworms? (Quick Identification)
4Bagworms are caterpillar pests that live inside protective silk bags covered in plant material.
✔️ Common Signs of Bagworms:

• Small hanging “bags” on branches
• Brown, dead foliage (especially on evergreens)
• Defoliation starting at the top of trees
• Visible larvae in late spring

👉 They are especially common on:

• Arborvitae
• Juniper
• Cedar
• Pine trees

⚠️ Why Bagworms Are DangerousBagworms aren’t just unsightly—they can seriously damage your landscape.
Key Risks:

• Defoliate entire trees
• Kill evergreen shrubs if untreated
• Spread quickly to nearby plants

👉 Severe infestations can kill trees within 1–2 seasons.

📅 When to Treat Bagworms in MarylandTiming is critical for effective control.
✔️ Best Treatment Windows:

• Winter (December – March):
  Hand-pick and destroy bags
• Late Spring (May – June):
  Apply insecticides when larvae are small
• Summer (July – August):
  Treatment is less effective as bags harden

🧑‍🌾 How to Get Rid of Bagworms (Step-by-Step)1. Hand-Pick Bagworms (Best Early Solution)

• Remove bags from branches
• Drop them into soapy water
• Dispose of them properly

👉 Each bag can contain hundreds of eggs, so removal is highly effective.

2. Use Bacillus thuringiensis (Bt)

• Organic, safe for beneficial insects
• Works best on young larvae
• Apply in late spring

👉 Bt is one of the most effective early-stage treatments.

3. Apply Spinosad or Insecticides

• Works on larger larvae
• Apply thoroughly to affected plants
• Follow label instructions

4. Spray at the Right Time

• Target newly hatched larvae
• Ensure full coverage of foliage

🌿 Best Plants Affected by BagwormsBagworms commonly attack:

• Arborvitae
• Junipers
• Cedars
• Spruce trees
• Some deciduous trees

👉 Evergreens are most vulnerable because they don’t regrow foliage easily.

🚫 Common Mistakes to Avoid

• ❌ Waiting too long to treat
• ❌ Not spraying thoroughly
• ❌ Ignoring early signs
• ❌ Skipping yearly inspections

🌱 How to Prevent BagwormsPrevention is easier than treatment.
✔️ Prevention Tips:

• Inspect trees in winter
• Remove visible bags early
• Maintain plant health
• Use preventive sprays in spring

🏡 Bagworm Treatment Cost in MarylandTypical professional treatment costs:

• Small infestation: $75 – $150
• Medium infestation: $150 – $300
• Large trees: $300+

👉 Early treatment is always cheaper.

🌳 Can Trees Recover From Bagworms?

• Light infestations: ✔️ Full recovery
• Moderate damage: ✔️ Partial recovery
• Severe damage: ❌ Possible plant death

👉 Arborvitae and evergreens may not regrow dead sections.

📍 Bagworm Control Services in Bethesda, MDAt Lawn Care Bethesda MD, we provide:

• Bagworm inspection and removal
• Targeted insecticide treatments
• Tree and shrub protection plans
• Full landscape pest control

👉 Contact us today for a free estimate and fast treatment.

⭐ Pro Tips for Eliminating Bagworms Fast

• Start with manual removal in winter
• Use Bt in late spring for best results
• Monitor trees regularly
• Treat early to avoid costly damage

❓ FAQ: How to Get Rid of BagwormsWhat kills bagworms instantly?Hand-picking and dropping them in soapy water is the fastest way to kill bagworms.
When is the best time to spray for bagworms?Late May through June, when larvae are small and vulnerable.
Can bagworms kill trees?Yes--severe infestations can kill trees, especially evergreens.
Will bagworms come back every year?Yes, if not controlled, they can return annually.
Is Bt safe for pets and people?Yes--Bt is a natural, safe insecticide when used properly.