Thrips in field crops

Insects Thrips Beanflower

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.

Further information

Last updated 15 June 2010