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Dicyphus hesperus

Dicyphus hesperus specializes in the control of white flies

Description


Dicyphus hesperus is a generalist predator who feeds on whitesflies, thrips, aphids, moth eggs and other pests. This predator is able to establish itself in greenhouses, keeping constant pressure on pest populations. Dicyphus is used successfully in several greenhouses in North America.

Adult and nymph are predator and very effective to control several species of whiteflies and thrips in tropical and semi-tropical ornamental crops. Because it is also a plant feeder, Dicyphus should not be used on its own to replace other biological control agents.

Adult has elongated shape (6 mm) and has large red eyes. The body is green and black with mottled semi-transparent. Adults Dicyphus are able to fly. The female lays her eggs inside plant tissue. Nymphs look like the adults, but they are smaller and, in the early stages, totally green. their wings are not developed.

Targeted crops



  • Market garden crops (tomato, cucumber, pepper, eggplant, etc.)
  • Ornemental plants (tropical and semi-tropical)

Targeted pests



  • Greenhouse whitefy (Trialeurodes vaporariorum)
  • Sweetpotato whitefly (Bemisia tabaci)
  • Silverleaf whitefly (Bemisia argentifolii)
  • Whitefly Dialeurodes spp.
  • Thrips
  • Aphids
  • Two-spotted spider mite (Tetranychus urticae)
  • Moth eggs

Life cycle


  • Dicyphus hesperus has a life cycle of approximately 5 weeks at 25 °C (77°F) and 8 weeks at 20°C (68°F).
  • The optimum conditions are a temperature above 20 °C (68°F) to 35 °C (95°F) and a relative humidity of 60% and more.
  • The females lays 3 eggs per day for a total of 175 eggs in their lifetime.
  • Eggs are laid inside plant tissue and are not easily seen. They hatch after 2 weeks.
  • Dicyphus obtains water from plant feeding. It may be contraindicated in some ornamental crops (e.g. Gerbera).
  • Use mullein (Verbascum thapsus) or egg plant banker plants to increase Dicyphus population.
  • Dicyphus needs a minimum of 13 hours light and a minimum of 15°C (59°F).

Format



Plastic container

  • 250, 500, 1 000 adults.

Introduction rate



Dicyphus hesperus
Introduction Quantity Surface Frequency Duration
Preventive 0,25-0,5 per m2 bi-weekly 2 introductions in total

To order


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Olivier Noël Roxanne S. Bernard

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Conservation-insectes

Cold storage reduces the quality and performance of biological control agents.

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