First report of Iris yellow spot tospovirus on onions in India
In India during 2002/2003, onion plants (Allium cepa) growing in the Jalna and Nasik regions of Maharashtra state showed symptoms of chlorotic spindle or diamond shaped lesions on the leaves and scapes with twisting or bending flower stalks. In advanced stages of the disease, lesions coalesced, leading to withering of leaves and flower-bearing stalks. Studies (mechanical inoculation to indicator plants, ELISA, RT-PCR) revealed the presence of Iris yellow spot tospovirus (IYSV - EPPO Alert List). This is the first report of IYSV in India. The situation of Iris yellow spot tospovirus in India can be described as follows: Present, first found in 2002/2003 on Allium cepa in Maharashtra state.
Sources
Ravi KS, Kitkaru AS, Winter S (2005) Iris yellow spot virus in onions: a new tospovirus record from India. New Disease Reports, Volume 11: February 2005 - July 2005. http://www.bspp.org.uk/ndr/july2005/2005-32.asp