beneficials for protected areas

Aphidius colemani

Parasitic wasp

Aphidius - Angriff auf Laus (© Schrameyer)
Aphidius colemani (© Schrameyer)
Puppe von Aphidius colemani (© Schrameyer)

The host range of Aphidius colemani includes a wide range of aphid species. An excellent combating success can especially be achieved with

  • Aphis gossypii
  • Myzus persicae.

This beneficial insect is especially useful for the early preventiv applictaion and for singly occurring aphids, because hidden aphids are tracked as well. With a size of 2-3mm, the adult A. colemani is about half as large as A. ervi. Head and thorax are black, the abdomen is brown. Within its life span of one week, a female can parasitize more than 200 aphids, each with one egg. Two days later, the larva hatches and begins to eat the inside of the aphid. After another 10 days, the larva pupates in the devoured empty aphid mummy. Those mummies are easy to recognize by their oversized, spherical shape and their gold-bronze colour. After about five days, the adult Aphidius hatches thruogh a round hole and immerdiately starts to parasitize new aphids.

Like A. ervi, Aphidius colemani has low demands concerning temperature (>15°C) and humidity. In contrast to Aphidoletes aphidimyza, both parasitic wasps are indepentdent from length of day. For a successful pest control, both species should be used.