VIRUSES OF NEPOVIRUS GENUS (PICORNAVIRALES, SECOVIRIDAE) IN THE SOUTH OF THE FAR EAST: RESULTS OF LONGITUDINAL MONITORING

Abstract. The aim of the presented work consists in the analysis of results of long-term monitoring of the members of one of the most important and interesting phytovirus taxons – genus Nepovirus (Picornavirales, Secoviridae, Comovirinae) – which is carried out since 1962 on the planned basis in the south of the Far East (Primorsky krai, Khabarovsk krai, the Sakhalin region) by the Laboratory of Virology of Federal Scientific Center of the East Asia terrestrial biodiversity of Far Eastern Branch of Russian Academy of Sciences (Vladivostok, Russia). Discussion. Many (it is possible – all) nepoviruses are capable to cause epiphytoties with significant economic damage for world economy. In the current article the organization of nepovirus genome, the principles of their division into three genetic groups (A, B, and C), virion morphology, the principles of division into three beyond density fractions (T, M, and B), the characteristics of phytopathology connected with nepoviruses, their ecology in the south of the Far East (including sources of isolation and vectors) are discussed as well as physical-chemical properties of some the most interesting strains from this region which apparently could represent new species of Nepovirus genus: Phryma asiatica mosaic virus (PhAMV); dayflower mosaic virus (DFMV); foenugreek necrotic spot virus (FoNSV); Capsicum annuum necrotic spot virus (CaNSV). Conclusion. Nepovirus genus is one of the most adapted for circulation in the phytocenoses of midlatitudes having natural reservoir among wild plants and pose serious threat for crops. On the basis of ecological features of nepoviruses the scientifically based list of preventive and protective actions against epiphytoties with nepovirus nature is provided. One of the most important elements of such actions is their planned monitoring at the regional level with obligatory comparison of the received results to universal data.

Nepovirus, Secoviridae, Picornavirales, epiphytotics, natural reservoir, vector, Nematoda, antisera

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