What deters pests from cauliflower?
Written by
Kiana Okafor
Reviewed by
Prof. Martin Thorne, Ph.D.Before planting cauliflower seedlings, consider pest prevention. Immediately after transplanting, cover the plant with floating row covers; these physical barriers will help deter both cabbage moths and flea beetles. I usually secure the edges with soil or rocks to get a nice, tight seal, which prevents virtually all insect infestations.
Companion Planting
- Thyme repels cabbage worms with aromatic oils
- Rosemary confuses flea beetles with strong scent
- Nasturtiums lure aphids away from cauliflower
- Mint deters ants but requires container planting
Spray Applications
- Neem oil disrupts feeding for soft-bodied insects
- Insecticidal soap suffocates aphids on contact
- Garlic spray repels multiple pests simultaneously
- Apply early morning for maximum effectiveness
Diatomaceous earth barriers: sprinkling this powder around the base of your plants creates a barrier that particulates dehydrate soft-bodied insects. I apply a 1-inch wide ring of the powder after watering. Now as it rains (or you are irrigating) the powder cover is disturbed. Respray post-rain/ irrigation. I use food grade for safety, and find this works better for slugs and crawling critters.
Biological Controls
- Release ladybugs for aphid control every 2 weeks
- Apply Bt (Bacillus thuringiensis) for caterpillars
- Introduce parasitic wasps for cabbage worms
- Encourage birds with nearby feeders
Cultural Practices
- Rotate crops yearly to disrupt pest cycles
- Remove plant debris where pests overwinter
- Use yellow sticky traps for flying insects
- Time planting to avoid pest life cycles
Monitor plants every three days. Check the undersides of leaves for eggs and young nymphs. I pick off the larger insects, using my glass for the tiny ones. One can usually catch the pests as youngsters before they start a pestiferous career.
Read the full article: When to Plant Cauliflower: Expert Timing Guide
