As your cabbage plants begin to form firm, dense heads, they also become a target for pests and diseases that love leafy greens. While cabbage is relatively hardy, timely inspection and simple interventions can make the difference between a clean harvest — and a total loss.
Common Pests to Watch For
1. Aphids
These tiny green, black, or white insects often hide on the undersides of leaves, feeding on sap and weakening the plant. Look for curled leaves and sticky residue (honeydew).
2. Cabbage Loopers & Moth Larvae
These green caterpillars chew large holes in leaves and can bury themselves deep in the head. You may spot their droppings before you see the pests.
3. Slugs
Especially active in damp conditions, slugs chew irregular holes and leave shiny slime trails behind.
Disease Signs to Catch Early
- Yellowing leaves that don’t recover with watering may be a sign of fungal issues like downy mildew or black rot.
- Spotted or water-soaked patches often signal bacterial or fungal infection.
- Wilting without visible damage could indicate root rot or clubroot.
What You Can Do
- Inspect the undersides of leaves every 2–3 days, especially near the core and lower leaf layers.
- Hand-pick caterpillars and slugs in the early morning or evening.
- Spray neem oil or insecticidal soap for aphids and soft-bodied insects.
- Use floating row covers to keep moths and beetles from laying eggs.
- Remove and dispose of infected or heavily damaged leaves — don’t compost them.
Supported by AiFarming
AiFarming alerts you when pest pressure is likely to rise, based on seasonal conditions in your area. You’ll receive tailored suggestions for protection methods, early signs to check, and follow-up reminders — keeping your cabbage safe from seedling to harvest.