Abstract
Plant viruses cause considerable economic losses and are a threat for sustainable agriculture. Due to the multiple possibilities of infection, they have become widespread. The use of healthy propagation material, free of viroids, viruses and bacteria, is an important strategy in disease control in viticulture. The early and accurate detection of plant viruses is an essential component of their control. Due to the widespread of Grapevine fanleaf virus (GFLV) and its devastating potential, various diagnostic methods are being used. GFLV detection methods based on the specificity of the protein cover (ELISA) and nucleic acid-based virus detection methods (RT-PCR, qRT-PCR). Symptoms of viral diseases are often not distinct and can be confused with those of abiotic stresses, so visual inspection is not reliable enough.
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