Passion fruit woodiness virus
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Passion fruit woodiness virus - Passionfruit woodiness virus (PWV)
The virus causes a disease of passionfruit (Passiflora edulis) characterized by crinkled leaves showing also a mosaic, blisters or yellow lesions. The plants are stunted and the fruits are small, deformed with a hard, woody rind. The virus is transmitted by aphids, by propagative cuttings and by pruning and grafting tools. The "passion fruit woodiness disease" can be also caused other viruses, that is by the Cowpea aphid-borne mosaic virus, e.g. in Brazil, or the East Asian Passiflora virus, e.g. in Japan.
Management of PWV involves sanitary methods, growing plants from seeds, cross-protecting plants with a mild virus strain and growing cultivars with partial resistance. The use of insecticides against aphid vectors has not been effective and the cross-protection method has also become less effective, possibly due to the appearance of new virus strains.