TARGET PEST: Whitefly, spider mite, thrips
FOR YOUR FILES: Dicyphus hesperus Tech Sheet (PDF)
- The predatory bug, Dicyphus hesperus (also known as Mirid Bug) is similar to Macrolophus caliginosus, which is being used in Europe to control whitefly, spider mites, moth eggs and aphids. The use of Dicyphus is being studied by D. Gillespie (Agriculture and Agri-Foods Canada Research Station, Agassiz, BC). Dicyphus should not be used on its own to replace other biological control agents. It is best used along with other biological control agents in greenhouse tomato crops that have, or (because of past history) are expected to have. whitefly, spider mite, or thrips problems.
- 0.25-0.5 predators/10 ft2 ) of infested area
- Sold as nymphs and adults. Release Dicyphus as soon as whiteflies are found, early in the season; repeat in 2-3 weeks. Release batches of 100 adults together in one area where whitefly is present or add supplementary food (frozen moth eggs: i.e. Sitotroga sp., Ephestia sp.) to these areas weekly. Dicyphus needs large numbers of prey (+100) to reproduce so releases should only be made in areas where pests have been detected or where supplementary food is being added. This predator obtains water from plant feeding and can survive for long periods without food but must have insect food to reproduce. Feeding damage to the plant or tomato fruit is superficial and not usually noticeable unless population levels exceed 100 Dicyphus/plant.
- Orders for D. hesperus must be received by noon on Thursday for shipment the following Wednesday, with exceptions for major holidays. Beneficial insects are normally shipped by FedEx Ground within the state of Washington, and by FedEx Express elsewhere in the USA. Please contact us directly if you require a different method of shipping.