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Contarinia pisi (Winnertz)
Insecta, Diptera, Cecidomyiidae .

Pea midge

Description, Biology, Life Cycle, Damage, Common Names, Images

- Adult: 3.0 to 3.5 mm long; black-yellowish general coloration.
- Eggs: white, about 0.5 mm.
- Larva: 2 to 3 mm long, of a milky white colour.
- Pupa: dark yellowish, in a silken cocoon coated with soil particles.

- Host plants: pea, possibly broad bean, horse bean and sweet pea (Lathyrus odoratus).
- Adult longevity: 4 to 6 days.
- Eggs are deposited in clusters inside the flowers, on the young leaves or the pea shoots.
- Larva: larval growth occurs over 10 to 12 days after which the larvae drop to the ground where they form cocoons.
- Pupa: development lasts 10 to 12 days.

[R]Life Cycle
- 2 annual generations, from May to July.
- The eggs are laid at the end of May-beginning of June and the larvae hatch 4 days later to feed at the base of the ovaries or amongst the leaves. Some of the first generation larvae remain in diapause until the next spring, the rest pupate.

Larval feeding causes swelling of the floral parts (*) , particularly the sepals; the petals are strongly clenched; an attack on terminal shoots leads to a reduction of flower stalks (*) .
The larvae also develop in the pods and feed on the internal surface of the latter or even on the developing seeds.

[R]Common Names
DE: Erbsengallmücke ES: Cecidómido del guisante FR: Cécidomyie du pois IT: Cecidomia del pisello PT: Cecidomídeo da ervilha GB: Pea midge

[R] Images

  1. Contarinia pisi (Winnertz) (COUTIN R. / OPIE)
    Damage on pea Attacked pea flowers turned into galls.
  2. Contarinia pisi (Winnertz) (COUTIN R. / OPIE)
    Inside a gall The gall has been cut open to show the total destruction of the reproductive organs once the fully grown larva has come out. The attacked flower finally falls off; the arrow shows the excision area.

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