Narcissus yellow stripe potyvirus (NYSV) is a plant virus of the genus Potyvirus in the family Potyviridae which infects plants of the genus Narcissus.ICTV Virus Taxonomy: 2013 release. Narcissus yellow stripe virus It is one of the commoner viruses infecting Narcissus, and is transmitted by aphids.
Infection with NYSV produces light or grayish green, or yellow stripes or mottles on the upper two-thirds of the leaf, which may be roughened or twisted. The flowers which may be smaller than usual may also be streaked or blotched.
References
Bibliography