Pest
Tomato Spider Mites
Also known as Two-spotted spider mite
Tiny sap-sucking mites that speckle tomato leaves, often with fine webbing, in hot and dry conditions.
Symptoms
- Fine pale speckling on the leaves
- Leaves turning bronze or yellow and drying out
- Fine webbing and tiny moving dots on the underside of leaves
What causes it
Spider mites multiply fast in hot, dry conditions, especially in greenhouses and on stressed plants.
What you can do
- Spray the underside of leaves with water to knock mites off.
- Raise humidity around greenhouse plants.
- Insecticidal soap or horticultural oil can help; follow the label.
- Remove heavily infested leaves and check plants weekly.
Not sure it's spider mites?
Photograph one affected leaf and Plantulus will suggest the most likely problem, with a confidence score. It's free and needs no sign-up.
Check a leaf photoOther tomato problems
General guidance only, not a diagnosis. Check product labels and local rules before using any treatment, and ask a horticultural specialist if a valuable plant is struggling. See the disclaimer.