SUUMARY. In addition to reducing crop yields and altering the function of ecosystems, weeds also serve as alternate hosts for pests and plant pathogens or harbour vectors and vector-borne diseases. The role of weeds as re-servoirs of viral pathogens and their impact on viral epidemiology and ecology is investigated in many parts of the world. The number of reports on viruses identified on weeds and new viruses discovered in cultivated and uncultivated plants is increasing globally. The most sensitive techniques used in screening and identification of viruses are nucleic acid-based detection methods. The metagenomic strategies are new approaches to analyzing viral populations in environmental samples through nucleic acid sequencing and filling the gap in our knowledge of viruses of non-cultivated plants. The review presents the data on weeds as reservoirs of plant viruses and on modern pathogen research methods.
Keywords: plant viruses, weeds, metagenomic analysis, plant virus diagnostics
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