Prunus necrotic ringspot virus

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Prunus necrotic ringspot virus (PNRSV) is a plant pathogenic virus that primarily affects species within the genus Prunus. This virus is a member of the family Bromoviridae and the genus Ilarvirus. It is known to cause significant economic losses in various fruit crops, including cherry, peach, plum, and almond.

Symptoms

Infected plants exhibit a range of symptoms, which can vary depending on the host species and environmental conditions. Common symptoms include:

• Necrotic ringspots on leaves
• Chlorotic rings and line patterns
• Leaf deformation
• Reduced fruit yield and quality
• Premature leaf drop

Transmission

PNRSV is primarily transmitted through infected plant material, such as grafting and budding. It can also be spread by pollen and seed transmission. The virus is not known to be transmitted by insect vectors.

Diagnosis

Diagnosis of PNRSV can be achieved through several methods, including:

• Enzyme-linked immunosorbent assay (ELISA)
• Polymerase chain reaction (PCR)
• Reverse transcription polymerase chain reaction (RT-PCR)

Management

Management of PNRSV involves several strategies:

• Use of virus-free planting material
• Regular monitoring and removal of infected plants
• Implementation of quarantine measures to prevent the spread of the virus
• Breeding and use of resistant cultivars

Economic Impact

PNRSV can cause significant economic losses in commercial fruit production due to reduced yield and quality of the produce. The virus can also lead to increased costs associated with the management and control of the disease.

See also

• Plant virus
• Viral disease of plants
• Prunus
• Bromoviridae
• Ilarvirus