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Chrysopa – Green Lacewing

Predator of Aphids

Chrysopa, better known as green lacewing, is a predator that often spontaneously occurs in greenhouses and open fields. The larvae are extremely greedy and efficient against aphids. The adults are fragile, light green insects with long, transparent, fine-veined wings and golden eyes. The adult green lacewing is no predator but feeds with nectar, honeydew and pollen.

Larvae are cannibalistic. If they don’t have an adequate supply of aphids they will eat each other. Because of this they are preferably used to control aphid outbreaks and not greatly beneficial as a preventative agent. They are really effective on short crops such as strawberry.

Advantages:

  •  The activity of Chrysopa carnea hardly depends on temperature and does not depend on relative humidity. The larvae work from 12°C to 35°C and can therefore also be introduced in open fields.
  • As they are rather primitive insects, there is a fairly good resistance against different pesticides.
  • The larvae are very agressive and very efficient in hot spots. One larva can eat up to 50 aphids per day.
  • Chrysopa carnea is a predator that does not only eat different kinds of aphids, but also other insects like red spider mites, thrips, white flies, etc.