General information about Colomerus vitis (ERPHVI). Eriophyes vitis is a mite species in the genus Eriophyes infecting grape leaves( Vitis vinifera). (Source: Wikipedia. Photo: (c) Ferran Turmo Gort, some rights. Exp Appl Acarol. Apr;74(4) doi: /sz. Epub Mar Impact of the erineum strain of Colomerus vitis (Acari.
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AcariProstigmataEriophyoideaEriophyidae. Grapevine Vitis vinifera L. The body of the grape erineum mite is yellowish, about 0. The prodorsum bears a pair of forward-pointing setae and several weak, longitudinal ridges along its entire length.
The featherclaw is five-rayed. The mite lives on the lower side of grape leaves and in the buds, overwintering there and in bark crevices. In the spring the mites move onto leaves as soon as they unfold and feed there, forming large colonies within the protective erineum.
grape erineum mite (USA) (Colomerus vitis)
They may also be carried on the growing shoot from the bud, settling first in the basal buds, their numbers gradually diminishing in the more distant buds.
Dispersal between plants is by winds, insects and especially by transferring propagation canes from infested stock to new areas. A life cycle is completed in about a fortnight, and annual generations may be raised. Reproduction is by arrhenotoky ; spermatophores are deposited by males on the leaves and taken up by the females. This pest causes different forms of damage to the grape, believed to be due to different mite races.
Feeding on the lower leaf surfaces induces the appearance of white-grey patches, made up of unicellular hairs erineum that grow out of depressions between the veins, and corresponding blisters that bulge out of the upper leaf sides.
Colomerus vitis (ERPHVI)[Overview]| EPPO Global Database
The patches later become brownish and may cover the entire leaf, leading to its premature drop. Such leaf damage is of economic importance only in nurseries, as it may retard plant growth. Another form of injury is due to feeding in the buds each of which is a cluster of colomersuresulting in deformations and stunting, and even death of buds. Finally, in heavy infestations the leaves curl, plant growth is retarded and yield viits affected.
Grape colomeeus may continue for several years before the causative agent is discovered. Pest damage to various grape varieties depends on the type of buds carried on the canes.
When only the primary bud can be fruitful, mite damage is far more severe than if the lateral buds are also capable of producing fertile shoots.
Mite numbers can be considerably reduced by careful, strain-dependent pruning, which requires prior knowledge about the distribution of the pest in the various buds. Varieties whose buds are very tightly compressed can accommodate fewer mites and are therefore relatively undamaged by the pest. Varieties with higher levels of indol acetic acid IAA were found in Iran to be less affected by the mite than other varieties.
Acaricides in common usage applied in the spring the only season when the pest is exposedalong with the pruning regime, may reduce injury.
However, as damage is dependent on individual growth pattern, control decisions should individually be made for each variety, as well as according to the perceived damage – if any. A pruning technique for saving vineyards severely infested by the grape bud mite Colomerus vitis Pagenstecher Eriophyidae.
Occurrence of the bud mite strain of Eriophyes vitis Pgst. Proceedings XI Congress of Entomology 2: Sources of resistance to the erineum strain of Colomerus vitis Acari: Eriophyidae in grapevine cultivars.
Systematic and Applied Acarology Les parasites des populations de la vigne sylvestre, Vitis vinifera silvestris Gmelin Hegi des Pyrenees Atlantiques France. Colomerus vitis Pagenstecher Taxonomic placing: GrapevinesVitis vinifera. Almost wherever grapes are grown.