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Resseliella theobaldi (Barnes)
Insecta, Diptera, Cecidomyiidae .

Raspberry cane midge

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

- Adult: 2 to 2.5 mm long, the male is smaller. Red ochre general coloration.
- Whitish eggs inserted in small clusters under bark flakes.
- Larva: 3 to 4 mm long, salmon red in colour (*) .
- Pupa: reddish; in earthen cocoon.
The larvae are visible under the bark of attacked stems.

- Host plants: raspberry, and occasinally Loganberry.
- Eggs: development lasts 5 to 8 days. They are laid in the longitudinal cracks which form naturally on the surface of the bark of the new year's canes.
- Larvae: they develop only under the bark of the new year's stems, feeding on the periderm; a purplish zone appears around the attacked area. At the end of their development, the healthy larvae leave the canes and bury themselves in the ground to spin cocoons and pupate.
- Development from egg to adult takes an average of 40 to 60 days. Only the parasited or ill larvae remain under the bark.

[R]Life Cycle
- 3 and sometimes 4 generations per year.
- This species overwinters as larvae in small earthen cocoons at the base of the plants. The first adults appear in April-May once the new canes measure 30 to 40 cm, those of the first generation at the end of July and those of the second at the beginning of August.

- Attack by this little known pest can bring about serious withering, as well as the drying up and death of the fruit-bearing canes in the following year at the time of flowering or of fruit formation (*) (*) .
- Different wound fungi (Fusarium, Verticillium, Coniothyrium, Didymella) colonize attacked bark.
The early removal of attacked canes reduces damage caused by this midge.
- This species is closely related to the bud and graft midge, Resseliella oculiperda (Rübsaamen), which feeds on the periderm of damaged stems (e.g. slit graft, shield graft) of certain Rosaceae.

At present unknown in Germany and Spain.

[R]Common Names
DE: Himbeerrinden-Gallmücke ES: Cecidómido de la corteza del frambueso FR: Cécidomyie de l'écorce du framboisier IT: Cecidomia della corteccia del lampone PT: Cecidomídeo da casca do framboeseiro GB: Raspberry cane midge

[R] Images

  1. Resseliella theobaldi (Barnes) (Coutin R. / OPIE)
    Larvae under bark of raspberry The bark of a 1-year-old stem was raised to show the larvae.
  2. Resseliella theobaldi (Barnes) (Coutin R. / OPIE)
    Damage on strawberry 2-year-old stem. Attacks of the preceding year led to the necrosis of underlying tissues.
  3. Resseliella theobaldi (Barnes) (Coutin R. / OPIE)
    Damage on raspberry Sudden drying of 2-year-old stems in the process of fructification after the attack of the preceding year.

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HYPPZ on line : Species (scientific name), Pests (common names), Glossary, Crops.

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