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Volume 4, Issue 3      July - September, 2016

A REVIEW PAPER ON POTATO LEAF ROLL VIRUS (PLRV) OF POTATO IN PAKISTAN
 

Aqleem Abbas1*, Muhammad Arif1, Murtaza Ali2

1Department of Plant Pathology, The University of Agriculture Peshawar Pakistan

2Department of Plant Breeding and Genetics, The University of Agriculture Peshawar Pakistan

 ABSTRACT

Potato leaf roll virus (PLRV) is one of the most important viruses infecting members of Solanaceae family. Among the members of Solanaceae family, potato crop is the most significant host of PLRV. The PLRV belongs to genus Polerovirus in the family Luteoviridae. It causes variety of symptoms depending on the viral strain, time of infection, host tolerance and environmental factors. The symptoms of PLRV are stunting and dwarfing of infected potato crops, reddening or yellowing and rolling of their leaves. It also reduces the size as well as number of potato tubers with annual global yield losses up to 20 million tonnes. In Pakistan PLRV has caused severe yield losses. It contains positive sense single stranded RNA ((+)ssRNA) of 5.9 kb genome. The virus can be transmitted by aphid vectors in circulative, non-propagative manner and experimentally by grafting. Among the aphid vectors, Myzus persicae is known to be its most efficient vector. There are various management strategies but most economic and environmentally satisfactory way of managing is breeding of resistant potato cultivars with effective vector control. Other approaches are thermotherapy, tissue culture, pathogen derived resistance and seed potato certification programs. Since PLRV is responsible for significant yield loss in potato crops of Pakistan, so understanding its biology and developing an efficient management strategy is very important.

Keywords: PLRV, occurrence, distribution, symptoms, transmission, control

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