Tomato thrip, thrips in beanflower and damaged beans.
Photos: D Ironside and L Wilson
For many field crops (apart from beans), thrips are only a significant pest at the seedling stage. They infest the underside of cotyledons, young leaves and growing points. Adults and nymphs pierce the leaf and suck out sap. Affected areas are silvery-white and younger leaves become distorted in shape and growing points can die. Damage is more significant if seedlings are not actively growing.
Flower thrips feed inside navy bean and mungbean flowers causing flower abortion and pod distortion. Deformed pods may be difficult to thresh, resulting in further yield losses.
- Onion or cotton seedling thrips (Thrips tabaci)
- Tomato thrips (Frankliniella schultzei)
- Plague thrips (Thrips imaginis)
- Western flower thrips (Frankliniella occidentalis)
- Maize thrips (Frankliniella williamsi)
- Crop Insects: The Ute Guide Northern Grain Belt
- Pests of Field Crops and Pastures: Identification and Control. Editor: P.T. Bailey