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Statements

Subject Item
dbr:Grapevine_fanleaf_virus
rdf:type
dbo:Species owl:Thing wikidata:Q12136 dbo:Disease
rdfs:label
Grapevine fanleaf virus Maladie du court-noué Reisigkrankheit
rdfs:comment
La maladie du court-noué est une maladie de la vigne. Die Reisigkrankheit (früher auch Kurzknotigkeit genannt) ist die bedeutendste Viruskrankheit der Weinrebe weltweit. Die Symptome der Krankheit können von verschiedenen verursacht werden. Daher spricht man auch häufig vom Komplex der Reisigkrankheit. Der Krankheitsverlauf ist schleichend. Erst nach einigen Jahren nach der Infektion zeigen sich erste Symptome. Im europäischen Weinbau ist sie seit mindestens 1882 belegt, existiert jedoch wahrscheinlich seit Anbeginn des Weinbaus. Als Krankheitsübertrager dienen Fadenwürmer. Grapevine fanleaf virus (GFLV) is a plant pathogenic virus of the family Secoviridae. It infects grapevines, causing chlorosis of the leaves and lowering the fruit quality. Because of its effect on grape yield, GFLV is a pathogen of commercial importance. It is transmitted via a nematode vector, Xiphinema index. This nematode acquires the virus through feeding on roots of an infected plant, and passes it on in the same manner.
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dbc:Nepoviruses dbc:Viral_grape_diseases
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12354276
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1093006885
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dbr:Xiphinema_index dbc:Viral_grape_diseases dbr:Vitis dbr:Secoviridae dbc:Nepoviruses dbr:Chlorosis
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dbp:imageCaption
Crystal structure of Grapevine Fanleaf Virus capsid. PDB entry
dbp:parent
Nepovirus
dbp:species
Grapevine fanleaf virus
dbp:synonyms
*grapevine arricciamento virus *grapevine court noué virus *grapevine infectious degeneration virus *grapevine Reisigkrankheit virus *grapevine roncet virus *grapevine urticado virus
dbo:abstract
Die Reisigkrankheit (früher auch Kurzknotigkeit genannt) ist die bedeutendste Viruskrankheit der Weinrebe weltweit. Die Symptome der Krankheit können von verschiedenen verursacht werden. Daher spricht man auch häufig vom Komplex der Reisigkrankheit. Der Krankheitsverlauf ist schleichend. Erst nach einigen Jahren nach der Infektion zeigen sich erste Symptome. Im europäischen Weinbau ist sie seit mindestens 1882 belegt, existiert jedoch wahrscheinlich seit Anbeginn des Weinbaus. Als Krankheitsübertrager dienen Fadenwürmer. La maladie du court-noué est une maladie de la vigne. Grapevine fanleaf virus (GFLV) is a plant pathogenic virus of the family Secoviridae. It infects grapevines, causing chlorosis of the leaves and lowering the fruit quality. Because of its effect on grape yield, GFLV is a pathogen of commercial importance. It is transmitted via a nematode vector, Xiphinema index. This nematode acquires the virus through feeding on roots of an infected plant, and passes it on in the same manner. Host and Symptoms: The host for Grapevine fanleaf virus or GFLV is the vitis species. This includes V. vinifera, V. rupestris, and hybrids. The symptoms of GFLV are “distortion of leaves and may cause unusual chlorotic (yellow) patterns on leaves, such as a yellow mosaic or yellow veins.”(5) Plants infected with GFLV also will have a reduced size and the fruit will be softer when compared to fruit from healthy plants. The leaves will be “severely distorted, asymmetrical, cupped and puckered, and exhibit acute dentations”, these symptoms tend to look like a fan, hence the name fanleaf virus. The canes may also show signs of abnormal branching, double nodding, and short internodes. Affected vines can also show signs of yellow mosaic which may affect all parts of the vine. The berries of the plant have a reduced yield and are smaller. They also have irregular ripening times.(4) Disease Cycle: The disease is spread by Xiphinema index a dagger nematode. The typical life cycle of Xiphinema index nematode goes through 6 life cycle stages. The females lay the eggs into the soil. Once the juveniles hatch from the egg they go through 4 molting stages where they get bigger after each molt. The nematode feeds and attacks the plant at all stages except when it's an egg. It uses its stylist to feed on the plant. During the feeding the nematode secretes enzymes into the plant to digest plant cells. During the feeding process the nematode can transfer the disease into the plant and it is also at this point that the nematode can become a carrier of the pathogen if it is not one already.(6) Management: To prevent GFLV planting certified disease free plants will make it so that the nematodes can not spread the disease unless they already have the pathogen. Another prevention method is the disinfect the pruning tools between each plant to help reduce the amount of disease spread from humans. An additional way to manage the disease is to get rid of any diseased plants and before the season starts test the soil for GLFV.(7) Finally, you can cover the crops with nematicidal properties and deep plow the fields and use nematode resistant rootstocks.(5)
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