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Eupoecilia ambiguella Hübner
Clysia ambiguella, Clysiella ambiguella

Insecta, Lepidoptera, Phaloniidae .

Grape bud moth, Grape cochilis, Vine moth

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

- Adult: 18 mm wingspan. Yellow fore wings with a large transversal trapezoic brownish band; grey and fringed hind wings (*) .
- Egg: slightly elliptical, light yellow, measuring 0.8 mm in length (*) .
- Larva: 11 mm long, reddish to brownish yellow, shiny black head and thoracic plate. Rematively long bristles arranged over the whole body.

- The grape bud moth can develop on vine, virginia creeper (Ampelopsis), black currant, currant, as well as various wild plants such as blackthorn (Prunus spinosa), yellow bedstraw (Galium), Viburnum lantana, privet (Ligustrum), tin-laurel (Viburnum tinus), ash (Fraxinus).
- Adult: the moth flies from dusk to dawn. To oviposite, it looks for humid sheltered sites. The eggs are deposited, in the evening, on the flower buds or, for the second generation, on the fruits.
- Egg: embryonic development lasts 8 to 12 days.
- Larva: the young caterpillar moves about on the plant for a few minutes ("strolling stage") then, to feed, slips between 2 or 3 flower buds which it unites with silk threads, forming a web, which it thickens gradually (*) .
The second generation larva lives on unripe fruits which it nibbles, causing their rotting.
- Pupe: the first-generation caterpillar pupate in leaf folds; those of second generation, in a greyish or brownish cocoon spun under the old bark of the vine-stock or in cracks in stake-posts (*) .
Pupal stage lasts 14 days.

[R]Life Cycle
- 2 annual generations.
- The moths arising from overwintered pupae appear at intervals and at variable dates depending on the region and weather conditions (from the end of March to the end of June). The second flight takes place 2 to 2.5 months after the first.

- Damage can be considerable. The presence of larvae, of webs and of rotten fruits downgrades the crop. The development of moulds renders wine making difficult. However, the damage caused by the grape bud moth has become rarer nowadays, this species having regressed compared to the vine moth , (Lobesia botrana).
- To fight against these pests Trichogramma is now uses as a biological agent.

[R]Common Names
DE: Einbindiger Traubenwickler ES: Polilla de la vid FR: Cochylis de la vigne IT: Tignola della vite PT: Cochilis GB: Grape bud moth, Vine moth, Grape cochylis

[R] Images

  1. Eupoecilia ambiguella Hübner Resting moth on a vine leaf (Coutin R. / OPIE)
  2. Eupoecilia ambiguella Hübner Egg at the base of a vine leaf (Coutin R. / OPIE)
  3. Eupoecilia ambiguella Hübner Larva and damage on vine inflorescence (SANDOZ)
  4. Eupoecilia ambiguella Hübner Larva and damage on grape grains (Coutin R. / OPIE)
  5. Eupoecilia ambiguella Hübner pupa In a fold of the bark of a vinestock.

To read this page in French

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

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