Orius insidiosus

Orius insidiosus general predator of thrips


Orius insidiosus is a generalist predator that can feed on many species of small, soft-bodied insects like thrips, mites, aphids, small caterpillars and pollen. It has been shown to be an effective control for western flower thrips in cucumber and sweet pepper greenhouses.

Orius insidiosus a small predatory pirate bug, 2-2.5 mm long, belonging to the Anthocoridae family. It is black with light brown spots on its back. The nymphs look like the adults, but are dark orange and 0.5 to 1.8 mm long.

The adults and nymphs are highly voracious generalist predators. All stages of Orius move very quickly. The adults are good flyers and move efficiently throughout a greenhouse to locate prey. Adults are attracted to and often found in flowers. If prey is abundant, Orius kills more thrips than it needs to survive. The presence of pollen favors development of Orius as it acts as an alternate food source. It can be used in combination with Neoseiulus cucumeris or Amblyseius swriskii


For the commercial market only.

Targeted crops

  • Ornamental plants (chrysanthemum, gerbera, etc.)
  • Market garden crops (cucumbers, tomatoes, sweet and hot peppers, melons, beans, eggplants, etc.)
  • Crops under shelters (small fruits, strawberries, grapes, etc.)
  • Indoor plants (plant walls, etc.)

Targeted pests

  • Onion thrips (Thrips tabaci)
  • Western flower thrips (Frankliniella occidentalis)
  • Echinothrips (Echinothrips sp.)
  • Aphids
  • Greenhouse whitefly (Trialeurodes vaporariorum)
  • Whiteflies Bemisia tabaci et B. argentifolii
  • Other soft-bodied insects

Life cycle

  • The Orius insidiosus life cycle is 3 weeks at 21 °C.
  • Optimal conditions are temperatures above 15 °C, with 60% relative humidity.
  • The sex ratio is generally 45% female to 55% male.
  • Females lay 2 eggs per day for a total of 30 eggs in their lifetime.
  • The young emerge 4-5 days later.
  • Nymphs go through 5 stages of development.
  • Adults live 3-4 weeks.
  • Orius enters diapause in the fall (as soon as there is less than 14 hours of light).



  • 500, 1 000, 10 000 et 25 000 adults with buckwheat shells.

Introduction rate

Orius insidiosus
Introduction Quantity Surface Frequency Duration
Preventive (only pollen plants) 0,5 per m2 bi-weekly 2 introduction in total
Curative light 1 per m2 weekly 2 introductions in total
Hot spot 5-10 per m2 weekly as needed
Field crops 5 000 to 10 000 per hectare
(2 000 to 4 000 / acre)
as needed 2 introductions in total

Additional information

  1.   - Orius insidiosus as biological control agent of Thrips in greenhouse chrysanthemums in the tropics (Bulletin of Insectology, 2004)
  2.   - Insidious flower bug (Orius insidiosus) (University of Florida, 2016)
  3.   - Predation by Orius insidiosus (Heteroptera: Anthocoridae) on Life Stages and Species of Frankliniella Flower Thrips (Thysanoptera: Thripidae) in Pepper Flowers (Environmental Entomology, 2004)
  4.   - Predation of Frankliniella occidentalis (Thysanoptera: Thripidae) in Field Peppers by Orius insidiosus (Hemiptera: Anthocoridae) (Environmental Entomology, 2000)
  5.   - Biological control: Minute Pirate Bug, Orius insidiosus (University of Florida, 2017)

Targeted pest

Targeted production

Recent news

Did you know


Green lacewing (Chrysoperla carnea) communicates by stridulation inaudible to the human ear.

Source : Insect Sounds and Communication : physiology, Behaviour, Ecology and Evolution (2006)

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