Honest 2026 guide
What Actually Works
We only recommend products backed by Penn State extension research and real-world use. Some links earn us a small commission — which helps keep the newsletter free. But we'd recommend these even if they didn't.
Circle Traps
RESCUE! Spotted Lanternfly Trap
Top PickThe pre-made bag-style circle trap designed specifically for SLF. Exploits their trunk-climbing behavior. Easy to install, easy to empty, no bird-catch risk.
Why it works
- ✓Bag-style — no sticky surfaces, no non-target catch risk
- ✓Designed specifically for SLF — fits standard tree trunk sizes
- ✓15-minute install, no tools required
- ✓Catches hundreds of adults per week during peak season
Watch out for
- !Sized for 4–10" diameter trunks — large ToH may need two
Bark Spray
Zylam Liquid Systemic Insecticide (Dinotefuran 20%)
For Heavy InfestationsThe professional standard for systemic SLF control. Applied to trunk bark, absorbed into the tree, kills feeding adults from within. One quart covers many trees.
Why it works
- ✓Systemic — kills adults that are feeding, not just ones you see
- ✓Long residual protection (weeks per application)
- ✓Works during peak aggregation — July through August
- ✓One quart application is more cost-effective than repeated contact sprays
Watch out for
- !Do not use near water or on blooming trees (pollinator risk)
- !Stronger tool — save for heavy infestations, not casual use
Safari 20SG (Dinotefuran, Soil Drench)
Soil drench version of dinotefuran. Slower uptake than trunk spray (2–3 weeks) but longer residual and works for large trees where bark application is difficult.
Why it works
- ✓Works for trees where bark spray is impractical
- ✓Longer residual than trunk spray
Watch out for
- !Slower (2–3 weeks to uptake vs. 24–48 hours for trunk spray)
Egg Scraping
Plastic Putty Knife Set (4-pack)
Simple, effective, cheap. Wide plastic scrapers are firm enough to dislodge egg masses without damaging tree bark. The standard tool for egg-scraping season.
Why it works
- ✓Gentle on tree bark — no cambium damage
- ✓Wide blade (3") covers egg masses in one stroke
- ✓Pack of 4 — share with neighbors at a scraper event
Isopropyl Alcohol (70%), Quart Bottle
Standard kill medium for scraped egg masses. Egg masses dropped into 70% isopropyl are dead within minutes. One quart handles hundreds of masses.
Why it works
- ✓Kills eggs reliably and quickly
- ✓Available everywhere — no special ordering
- ✓Safe to handle, easy to carry in a small container
Tree of Heaven Removal
Garlon 4 Ultra (Triclopyr Ester 61.6%)
Best for ToH RemovalThe professional herbicide for Tree of Heaven cut-stump treatment. Apply within 30 minutes of cutting for complete kill. Without stump treatment, ToH resprouts aggressively from roots.
Why it works
- ✓Most effective ToH herbicide — penetrates fresh cut surface
- ✓Kills the root system, not just the cut trunk
- ✓Professional-grade, used by forestry crews
Watch out for
- !Quicker uptake via ester formulation — must be applied within 30 minutes of cut
- !More expensive than Roundup but significantly more effective on ToH
What We Don't Recommend
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