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Dasineura ignorata (Wachtl)
Insecta, Diptera, Cecidomyiidae .

Alfalfa sprout midge

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

- Adult: 1.5 to 2.0 mm (*) .
- Eggs: introduced between the young leaves and stipules of terminal or lateral buds at the upper parts of the stem.
- Larva: yellow to yellowish-red (*) .

- Host plants: mainly lucerne and its cultivars.

[R]Life Cycle
- Up to 4 generations per year. The first 3 may occur prior to flowering of lucerne (seed-crop). 2 generations in Germany.
- Adults appear and start laying from April onwards.
- The larva leaves the invaded bud towards mid-June and pupates in a cocoon in the soil.

The extent of the damage may vary considerably from one year to another and according to location. The main attacks occur on the spring shoots. The buds are rapidly deformed by the larvae, and bulb-shaped galls (10 to 15 per stem) may be observed (*) . Bud development is hindered, which checks further growth and flowering of infested lucerne plants.

[R]Common Names
DE: Luzernesproß-Gallmücke ES: Cecidomídeo de los brotes de la alfalfa FR: Cécidomyie des pousses de la luzerne IT: Cecidomia delle gemme dell'erba medica PT: Mosquinha (cecidomídeo) dos rebentos da luzerna GB: Alfalfa sprout midge

[R] Images

  1. Dasineura ignorata (Wachtl) (ACTA)
    Adult Drawn from a microscope-mounted specimen.
  2. Dasineura ignorata (Wachtl) (Coutin R. / OPIE)
    Damage (external view) Lucerne bud attacked (arrowed); its growth has stopped.
  3. Dasineura ignorata (Wachtl) (Coutin R. / OPIE)
    Damage (internal view) The bud has been cut open to show the internal aspect of the attacked part (arrowed).
  4. Dasineura ignorata (Wachtl) (Carré S. / INRA Lusignan)
    Larvae in bud of attacked alfalfa

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