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Colomerus vitis (Pagenstecher)
Eriophyes vitis

Arachnida, Acari, Eriophyidae .

Grape erineum mite, Vine leaf blister mite

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

Vermiform and soft body, about 0.15 mm long, visible only with lens (*) . 2 pairs of legs on the anterior part of the body, the posterior part is decorated with parallel transverse grooves.

- Host plant: the vine.
- There are 3 biological races of this mite which are distinguishable by the type of damage caused. One causes erinea (characteristic swellings), the other, the rolling up on the leaves and the last attacks the buds ("bud mite").
- Adult: the female overwinters, sheltered at the base of vine shoots.

[R]Life Cycle
- The number of annual generations is about 7.
- In a 1st phase of "reproduction", the adults leave their shelters and move towards the green part of the bud which may be attacked from stage C. When leaves appear, the 1st galls become visible (*) ; the mites invade the young tissues, causing the development of a charaterisitc coating essential for their development and reproduction (*) .
The 1st eggs appear at stage E, the 1st nymphs at stage F. At this stage, the first 2 to 3 leaves at the base of the vine shoot are strongly infested.
- Then comes the "migratrion" phase during which the 1st adults migrate towards the terminal bud, the new leaves of the small branch, then the axillary buds. This migration begins at the end of May, intensifies after flowering and carries on for 2 months.
- The return migration begins in August and ends in October-November. The adults leave the leaves and return to the overwintering places at the base of the vine shoot.

- The bites on the young leaves induce the appearance of typical more or less spatially separated swellings (*) covered on their lower side with a very dense white or pink then brown coating. This coating is formed by the hypertrophy of the leaf hairs.
- Other tissue (axillary buds, bracts, peduncles, young fruits) may be found to be infested before becoming free from the terminal bud (*) ; the petioles, the stems and the tendrils are sometimes covered with galls and the growth of the plant is impaired.

[R]Common Names
DE: Rebenblattfilzmilbe, Rebenpockenmilbe ES: Erinosis de la vid FR: Acarien de l'érinose et de la vigne IT: Eriofide della vite PT: Ácaro da erinose da vinha GB: Grape erineum mite, Vine leaf blister mite

[R] Images

  1. Colomerus vitis (Pagenstecher) (Coutin R. / OPIE)
    Galls at the upper side of leaves
  2. Colomerus vitis (Pagenstecher) (Coutin R. / OPIE)
    Leaves damaged by the presence of galls
  3. Colomerus vitis (Pagenstecher) (Coutin R. / OPIE)
    Erineum in which mites are sheltering This erineum develops on the underside of the leaves protruding from the galls.
  4. Colomerus vitis (Pagenstecher) (Nalepa)
    Adult Ventral and dorsal surfaces.
  5. Colomerus vitis (Pagenstecher) (Cotton D. / INRA Montpellier)
    Damage on bunch of grapes

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