Holes in Tomato Leaves: What It Means and What to Do
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GardenSays
Best match: Slugs and snails. Manageable if you act.
- Best match
- Slugs and snails
- Severity
- Minor
- Causes checked
- 3
Based on holes or chewed leaves on the lower leaves with moist soil, the closest match is slugs and snails. Confirm it against the actual plant: Irregular holes with smooth edges plus slime trails, damage appearing overnight.
- This is a symptom-pattern match from your written description, not a lab diagnosis. If the plant is collapsing over days (not weeks), treat it as the worst plausible cause until ruled out.
Do this this week
- 1.Confirm it first: Irregular holes with smooth edges plus slime trails, damage appearing overnight.
- 2.Evening patrol, beer traps, or iron-phosphate bait; keep mulch pulled back from stems.
- 3.Collapsing fast (days, not weeks)? Photograph it and check with your county extension before treating
Calculated result · 3 verified sources · Checked 2026-07-15 · How we decide
Why
What to do: Evening patrol, beer traps, or iron-phosphate bait; keep mulch pulled back from stems.
If that doesn't match what you see, work down the list: Flea beetles (dozens of tiny round 'shothole' pits, worst on young plants.); Tomato hornworm (large ragged missing chunks appearing fast, dark droppings on lower leaves; a big green caterpillar hiding along stems.).
- A symptom tree ranks causes by how well your conditions match each cause's known pattern — the distinguishing signs are how you confirm it on the actual plant, not a lab result.
- Most leaf problems trace to water, weather, or common leaf-spot fungi; true plant-killers are rarer but worth ruling out first.
When this doesn't apply
- If the plant is collapsing fast (days, not weeks), treat it as the most severe possibility on the list until proven otherwise.
- Multiple symptoms at once usually means the top cause here plus plain stress — fix watering first, then re-check.
How this was calculated
- 1. SymptomSource guidance
Tomato: holes or chewed leaves — 3 known causes evaluated (extension-sourced)
- 2. Your conditionsCalculated result
Location on plant: lower; soil: moist. Causes whose known pattern matches these conditions rank higher — this narrows the list, it doesn't identify anything.
- 3. 1. Slugs and snailsmatch score 5Calculated result
Distinguishing signs: Irregular holes with smooth edges plus slime trails, damage appearing overnight.
- 4. 2. Flea beetlesmatch score 4Calculated result
Distinguishing signs: Dozens of tiny round 'shothole' pits, worst on young plants.
- 5. 3. Tomato hornwormmatch score 3Calculated result
Distinguishing signs: Large ragged missing chunks appearing fast, dark droppings on lower leaves; a big green caterpillar hiding along stems.
Data sources
- University of Minnesota Extension — Growing tomatoes in home gardens (common problems) (checked 2026-07-15)
- UMN Extension — What's wrong with my plant? (tomato diagnostic) (checked 2026-07-15)
- Cornell Vegetables — Disease factsheets (checked 2026-07-15)
What changes this answer
Where on the plant?
Soil right now
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People also ask
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