Narcissus yellow stripe virus

Narcissus yellow stripe potyvirus (NYSV) is a plant pathogenic Potyvirus of the family Potyviridae which infects plants of the genus Narcissus. It is one of he 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.