How to Kill and Report Spotted Lanternfly

🧰 What You'll Need

Rubbing alcoholStiff brushScraperSealed bagPhone for reporting

📋 Steps

Check your state's quarantine status

Visit your state department of agriculture website — many states now have SLF quarantine zones with specific reporting requirements. In quarantine states, you're legally required to report new county detections.

Scrape and destroy egg masses (Sept-June)

Egg masses: brown putty-like patches on flat surfaces (tree trunks, vehicles, outdoor furniture, stone, metal). Scrape into rubbing alcohol or hand sanitizer in a sealed bag — NOT onto the ground (eggs survive on soil).

Kill nymphs and adults on sight

Crush them or spray directly with neem oil or insecticidal soap. Report large infestations to your state ag department.

Treat Tree of Heaven on your property

SLF's primary host is Tree of Heaven (Ailanthus altissima) — consider removing it or treating with systemic herbicide. A single mature TOH can support thousands of SLF adults.

Don't move materials from quarantine zones

Moving firewood, plants, vehicles, or outdoor equipment out of quarantine zones can spread SLF to new areas. Inspect all items before transport.

💡 Pro Tips

Any vehicle that has been parked under trees in a quarantine area should be inspected for egg masses before driving — this is how SLF spreads to new states
Dinotefuran bark spray applied to Tree of Heaven trunks kills feeding SLF adults rapidly
SLF reporting data helps state agencies track spread — every report matters for the containment effort

⚠️ Warnings

Do NOT place scraped egg masses on the ground — eggs survive soil contact and can still hatch

💰 Cost to Fix This Problem

Approach	Typical Cost	Best For
DIY materials only	$15–$40	Mild or early-stage infestations
Professional service (one-time)	$130–$300	Active infestations or when DIY has already failed
Ongoing service contract	$400–$800/yr	Prevention and long-term peace of mind

Approach

Typical Cost

Best For

DIY materials only

$15–$40

Mild or early-stage infestations

Professional service (one-time)

$130–$300

Active infestations or when DIY has already failed

Ongoing service contract

$400–$800/yr

Prevention and long-term peace of mind

Costs vary by region, property size, and severity. Get at least two quotes before hiring.

✅ How to Know It's Working

Pest control success is measured in weeks, not days. Here's what to look for:

Week 1–2: You may see increased activity as pests are flushed from hiding. This is normal.

Week 2–4: Activity should drop noticeably. Bait traps or sticky monitors should show declining counts.

Week 4–6: New activity near zero. Any resurgence means a population was missed or re-introduction occurred.

💡 Monitoring tip: Place sticky traps in corners and along walls before you start treatment. Counting catches weekly gives you objective data on whether the population is declining.

👷 When to Call a Professional

DIY is appropriate for small, contained infestations caught early. Call a licensed professional when:

You've tried DIY twice with no lasting improvement

The infestation involves a wall void, crawlspace, or area you can't safely access

There's a health risk involved (hantavirus, anaphylaxis risk, etc.)

The problem covers more than one room or a large outdoor area

You have children, elderly, or immunocompromised individuals in the household

⚠️ Rule of thumb: If you've spent more on DIY materials than a professional visit would cost, it's time to call.

❓ Frequently Asked Questions

How do I reduce stink bug populations in my yard?

Remove or manage host plants near the house including stone fruit trees, tomatoes, peppers, and beans. Weed management and removing debris piles reduces harborage. Kaolin clay applied to garden plants creates a physical feeding barrier.

Are stink bugs harmful to my garden?

Yes. Brown marmorated stink bugs damage fruit and vegetables by piercing plant tissue, creating dimpled discolored areas. Tomatoes, peppers, apples, and peaches are among the most affected crops.

Will pheromone traps reduce stink bugs?

Research shows pheromone traps may actually increase local populations by attracting more bugs than they capture. Traps near the house can worsen the problem. Physical exclusion remains the most effective home protection.

Do stink bugs have natural predators?

The samurai wasp parasitizes stink bug eggs and is the most effective natural enemy. Assassin bugs, praying mantises, and some birds also prey on them. Encouraging beneficial insect habitat provides some natural suppression.