Pest identification
What's eating my roma tomato?
Tomato hornworm
Signs: Large green caterpillars (up to 4 in) that strip leaves rapidly, leaving bare stems and dark frass droppings.
Control: Hand-pick and destroy; apply Bacillus thuringiensis (Bt) spray at first sign; leave caterpillars with white parasitic wasp cocoons — they will die naturally.
Aphids
Signs: Clusters of small soft insects on undersides of leaves and growing tips; curled yellow leaves and honeydew residue.
Control: Spray with strong water jet or insecticidal soap; introduce ladybirds; use reflective mulch to disorient winged aphids.
Tomato fruitworm (corn earworm)
Signs: Larvae bore into developing fruits, leaving entry holes with frass; damaged fruit rots quickly.
Control: Apply spinosad or Bt spray when eggs hatch (tiny yellow eggs on foliage); remove and destroy infected fruits promptly.
Whitefly
Signs: Tiny white winged insects on leaf undersides; yellowing leaves, honeydew, sooty mould, and reduced vigour.
Control: Use yellow sticky traps to monitor; spray with insecticidal soap or neem oil; introduce Encarsia formosa biological control in greenhouses.
Keep roma tomato pest-free
Healthy plants resist pests best. Get the basics right:
Roma Tomato pests — FAQ
What is eating my roma tomato?
Roma tomatoes face heavy pest pressure: tomato hornworm is the most destructive, stripping whole branches overnight. Aphids, whitefly, and tomato fruitworm (corn earworm) also attack. Outdoors, deer and birds target ripening fruit. Consistent scouting, physical barriers, and targeted sprays keep plants productive through the season.
How do I get rid of tomato hornworm on roma tomato?
Large green caterpillars (up to 4 in) that strip leaves rapidly, leaving bare stems and dark frass droppings. Hand-pick and destroy; apply Bacillus thuringiensis (Bt) spray at first sign; leave caterpillars with white parasitic wasp cocoons — they will die naturally.
How do I get rid of aphids on roma tomato?
Clusters of small soft insects on undersides of leaves and growing tips; curled yellow leaves and honeydew residue. Spray with strong water jet or insecticidal soap; introduce ladybirds; use reflective mulch to disorient winged aphids.
How do I get rid of tomato fruitworm (corn earworm) on roma tomato?
Larvae bore into developing fruits, leaving entry holes with frass; damaged fruit rots quickly. Apply spinosad or Bt spray when eggs hatch (tiny yellow eggs on foliage); remove and destroy infected fruits promptly.
How do I get rid of whitefly on roma tomato?
Tiny white winged insects on leaf undersides; yellowing leaves, honeydew, sooty mould, and reduced vigour. Use yellow sticky traps to monitor; spray with insecticidal soap or neem oil; introduce Encarsia formosa biological control in greenhouses.