Parasitoid key

Identification of parasitoids on aphids of Poaceae

Recognizing principal genera of parasitoids of cultivated Poaceae

The proposed identification key is based on visual observation of:

  • forewing venation based on the complete venation of a reference wing   
  • form of the ovipositor  (V3)
  • number of tubercles on tergite 1  (T1)

Aphidiinae

All cells 1, 2, 3,4, 5,
closed up

Ovipositor triangular
Toxares (deltiger)

Ovipositor tapering
Ephedrus (plagiator)

Aphidius (ervi, avenae, rhopalosiphi, uzbekistanicus, matricariae, colemani)

Cells 2, 3 and 5 joined together; cell 1 open

Lysiphlebus (fabarum, testaceipes)

Veins 3-SR+SR1, r-m and only one part of 3-M (T-shaped) present

Praon (gallicum, volucre, abjectum, necans)

Veins 1-SR+M, m-cu and 3M present, sometimes m-cu effaced, or 1-SR+M partly effaced

Only vein 3-SR present, but short

Ovipositor tip pointed
Adialytus (ambigus)

Ovipositor tip square
Diaeretiella (rapae)

Ovipositor axe-shaped
Monoctonus (caricis, cerasi)

Only vein 3-SR present,
long

Ovipositor tweezer-shaped

T1 view from above with 4 tubercles
Binodoxys (angelicae)

T1 view from above with 2 tubercles
Trioxys (auctus)

Aphelininae

Aphelinus (abdominalis, asychis, flavipes, varipes, chaonia)

Mummies black and elongate

In this folder

Identification based on morphological criteria, click on the name to access identification file
Identification based on morphological criteria, click on the name to access identification file

Modification date : 07 February 2023 | Publication date : 12 September 2013 | Redactor : Evelyne Turpeau, Maurice Hullé, Bernard Chaubet