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Carrot virus Y (CarVY) is a (+)ss-RNA virus that affects crops of the carrot family , such as carrots, anise, chervil, coriander, cumin, dill and parsnip. [1] Carrots are the only known crop to be infected in the field. Infection by the virus leads to deformed roots and discolored or mottled leaves.
Several viruses are known to infect the plant, including seed-borne strawberry latent ringspot virus, parsnip yellow fleck virus, parsnip leaf curl virus, parsnip mosaic potyvirus, and potyvirus celery mosaic virus. The latter causes clearing or yellowing of the areas of the leaf immediately beside the veins, the appearance of ochre mosaic ...
The virus specifically targets carrots, parsnips, and cilantro but only effects carrot as this is the only host for the vector. This virus alone does not cause symptoms in carrots, but in connection with Carrot red leaf virus (CRLV) causes yellowing, reddening of leaves and yield loss.
Common scab is a plant disease of root and tuber crops caused by a small number of Streptomyces species, specifically S. scabies, S. acidiscabies, S. turgidiscabies and others. Common scab mainly affects potato ( Solanum tuberosum ), but can also cause disease on radish ( Raphanus sativus ), parsnip ( Pastinaca sativa ), beet ( Beta vulgaris ...
Sequivirus is a genus of viruses in the order Picornavirales, in the family Secoviridae.Plants serve as natural hosts. There are three species in this genus. Diseases associated with this genus include: PYFV: vein-yellowing, yellow flecks and yellow/green mosaic symptoms in parsnip, and ‘yellow net', followed by yellow spots and leaf distortion in celery.
Plants infected by the virus late in their development may provide usable crops provided that the crops are harvested quickly after infection. [6] Celery is the most common host of this virus. As the name implies, this virus causes a mosaic or mottling in the leaves of celery. There can also be malformation of leaflets.
Cucumber leaves afflicted with various stages of Cucumber mosaic virus. A mosaic virus is any virus that causes infected plant foliage to have a mottled appearance. Such viruses come from a variety of unrelated lineages and consequently there is no taxon that unites all mosaic viruses.
Older leaves are the most susceptible to infection; when approximately 40% of the leaf surface area has become infected by Alternaria dauci, the leaf will completely yellow, collapse, and die. [5] It is during extended conditions of warm, moist weather that lesions can coalesce and cause entire tops of carrot plants to die off, a phenomenon ...