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Papaya apical necrosis virus Droopy necrosis Papaya droopy necrosis virus Feather leaf Unknown virus Leaf curl Virus suspected Mosaic Papaya mosaic virus: Papaya ringspot: Papaya ringspot virus: Papaya lethal yellowing: Papaya lethal yellowing virus: Spotted wilt Tomato spotted wilt virus: Sticky disease ('meleira') Papaya meleira virus complex
Papaya ringspot virus (PRSV) is a pathogenic plant virus [1] in the genus Potyvirus and the virus family Potyviridae which primarily infects the papaya tree. The virus is a non-enveloped, flexuous rod-shaped particle that is between 760–800 nm long and 12 nm in diameter.
The spots become sunken, turn brown or black, and may get bigger. In some of the older spots, the fungus may produce pink spores. The fruit ends up being soft and having an off flavor because the fungus grows into the fruit. [22] The fungus powdery mildew occurs as a superficial white presence on the leaf's surface, which is easily recognized ...
Chlorosis spreads to older leaves followed by necrosis [4] and water-soaked spots appear on the petioles and stems. [5] In diseased plants, flowers and fruit are rarely produced and during advanced stages of the disease, the papaya plant becomes denuded except for a few stunted leaves that remain at the apex. [4]
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Papaya leaf curl virus (PaLCuV) is a DNA virus from the genus Begomovirus and the family Geminiviridae. PaLCuV causes severe disease in papaya ( Carica papaya ), but can sometimes infect other crops such as tobacco or tomato . [ 1 ]
Papaya mosaic virus (PapMV) is a plant pathogenic virus in the genus Potexvirus and the family Alphaflexiviridae. PapMV is a filamentous, flexuous rod, 530 nm in length. [1] The virus is a monopartite strand of positive-sense, single-stranded RNA surrounded by a capsid made for a single viral encoded protein.
White spots on nails, also known as leukonychia, are usually harmless but may indicate a medical condition. Dermatologists explain common causes and treatment.