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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The leaf curling strain of C. The erineum strain of C. Varieties with higher levels of indol acetic acid IAA were found in Iran to be less affected by the mite than other varieties.
Eriophyes vitis – Wikipedia
The percentage of leaves with erinea, as well as the number of erinea per leaves and the diameter of bitis increased along with the mite population density. Most infested plants produced shorter canes and their lengths appeared to have a strong negative correlation with the highest mite density in four cultivars; canes of Sahebi Uroomie did not appear affected.
The leaf curling strain causes the leaf edge to curl down and inwards until leaves are bowed up dorsally. The experiment was performed in a full factorial design 12 replicates each and effects of the mite on the relative content of leaf chlorophyll, internode and cane length, leaf area and weight, number and size of the erinea, and percentage of leaves with erinea were investigated. Occurrence of the bud mite strain of Eriophyes vitis Pgst.
Varieties whose buds are very tightly compressed can accommodate fewer mites and are therefore relatively undamaged by the pest. Also mite density on leaves and in buds was assessed.
The reduced internode length was weak in infested plants.
I, colomefus copyright holder of this work, hereby publish it under the following license:. The present experiment was aimed at determining the influence of the grape erineum strain of Colomerus vitis GEM Acari: This pest causes different forms of damage to the grape, believed to be due to different mite races.
The mite densities in buds April and on leaves with erinea in November were higher at the highest treatment level in the ccolomerus Rishbaba and late ripening Sezdang Ghalat cultivars, than in the early and early-medium ripening ones. If the infestation is severe, leaves may be reduced in size and distorted so that the bunches of grapes are unduly exposed to the sun.
The relative content of chlorophyll expressed in Spad units in infested leaves was reduced along with an increase in mite density and it was shown to be highly significant at the two higher mite density levels for Khalili Bovanat, Rishbaba and Sezdang Ghalat; Shahani and Sahebi Uroomie leaves appeared to be less affected by mite infestation. The chemical control strategies employed for tetranychids usually control C. Colomerus vitis Pagenstecher Taxonomic placing: However, as damage is dependent colomeus individual growth pattern, dolomerus decisions should individually be made for each variety, as well as according to the perceived damage – if any.
New blisters do not generally form on fully expanded leaves. This is to ensure that we give you the best experience possible. Chemical Control Due to the variable regulations around de- registration of pesticides, we are for the moment not including any specific chemical control recommendations. Data were analyzed with a two-way ANOVA followed by Tukey’s test to separate means among treatment levels and cultivars.
This page was last edited on 12 Juneat Diseases and disorders of Vitis Colomerus vitis Galls. The timestamp is only as accurate as the clock in the camera, and it may be completely wrong.
Another form of injury is due to feeding in the buds each of which is a cluster of budsresulting in deformations and stunting, and even death of buds. Such leaf damage is of economic importance only in nurseries, as it may retard vitks growth. 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. 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.
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File:Colomerus vitis (Eriophyes vitis), Arnhem, the Netherlands – 2.jpg
EU pesticides database www. Grape decline may continue for several years before the causative agent is discovered. Knowledge Bank home Change location. AcariProstigmataEriophyoideaEriophyidae. The blistered areas are incapable of resuming normal development which results in disruption or coalescence of venation, irregular leaf margins and generally mishapen leaves at maturity.