National audience
The ectoparasitic dagger nematode, Xiphinema index, transmits Grapevine fanleaf virus (GFLV), which is responsible for a progressive degeneration of grapevines occurring across the world's vineyards. Since 2000, new data on the biology and ecology of the vector nematode and on the virus-nematode and plant-nematode interactions have contributed...
International audience
National audience
Aim : Grapevine plants from the Bordeaux wine region (France) showing symptoms of fanleaf degeneration, but negative for the two main fanleaf viruses were screened by ELISA for other nepoviruses that could explain the symptoms. Methods and results : ELISA tests were performed over a 3-year period (2009-2011) on leaves and woody canes. A total...
The dagger nematode Xiphinema index has a high economic impact in vineyards by direct pathogenicity and above all by transmitting the Grapevine fanleaf virus (GFLV). Agrochemicals have been largely employed to restrict the spread of GFLV by reducing X. index populations but are now banned. As an alternative to nematicides, the use of fallow...
The ectoparasitic dagger nematode Xiphinema index specifically transmits Grapevine fanleaf virus (GFLV) which is responsible for a progressive degeneration of grapevines occurring in most vineyards worldwide. Because of the ban on nematicides and of the economically unacceptable interval (>7 years) required for nematode eradication between two...
Scaphoideus titanus, a leafhopper native to North America and invasive in Europe, is the vector of the Flavescence doree phytoplasma, the causal agent of the most important form of grapevine yellows in European vineyards. We studied 10 polymorphic microsatellite loci and a 623 bp fragment of the mitochondrial cytochrome oxidase II gene in...
National audience
National audience
The NemadexAB rootstock, created by Alain Bouquet at INRA Montpellier and registered in 2011, is able to delay the contaminations of the vines by GFLV thanks to the presence of Muscadinia rotundifolia in his parenthood. But it remains difficult to grow, with a poor conferred vigor to scion and a susceptibility to both chlorosis and drought. For...