''Narcissus yellow stripe potyvirus'' (NYSV) is a plant pathogenic ''

Potyvirus ''Potyvirus'' is a genus of positive-strand RNA viruses in the family ''Potyviridae''. Plants serve as natural hosts. The genus is named after member virus ''potato virus Y''. Potyviruses account for about thirty percent of the currently known ...

'' of the family ''

Potyviridae ''Potyviridae'' is a family of positive-strand RNA viruses that encompasses more than 30% of known plant viruses, many of which are of great agricultural significance. The family has 12 genera and 235 species, three of which are unassigned to a ...

'' which infects plants of the genus '' Narcissus''.ICTV Virus Taxonomy: 2013 release. Narcissus yellow stripe virus
/ref> It is one of the commoner viruses infecting Narcissus, and is transmitted by

aphids Aphids are small sap-sucking insects and members of the superfamily Aphidoidea. Common names include greenfly and blackfly, although individuals within a species can vary widely in color. The group includes the fluffy white woolly aphids. A t ...

. 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.

Taxonomy

Added to the ICTV taxonomy in the 5th report (1991), and the family Potyviridae in 1993.

References

Bibliography

* * Viral plant pathogens and diseases Potyviruses {{Virus-plant-disease-stub