
%0 Journal Article
%A Ali, A. 
%A Hassan, S. 
%T Viruses infecting winter tomato crops in the North West Frontier Province of Pakistan
%J Australian Journal of Agricultural Research
%D 2002/02/20
%V 53
%N 3
%P 333-338
%K 
%R https://doi.org/10.1071/AR01103
%U https://www.publish.csiro.au/paper/AR01103 
%X Malakand Agency is a unique production area in the North West Frontier Province (NWFP) of Pakistan that is frost-free and in which tomato is grown as a winter crop. Tomato production in this area has been affected by virus-like diseases for the last 10 years. Tomato nurseries and fields at 11 locations in Malakand Agency were surveyed for tomato viruses during 1994&#8211;95. A total of 1071 samples from nurseries and 5083 samples from 142 fields were tested by indirect enzyme-linked immunosorbent assay (ELISA). In nurseries, 3 viruses, Potato virus X (PVX), Potato virus Y (PVY), and Tomato mosaic virus (ToMV), were detected with an incidence range of 9.8&#8211;22.3, 0&#8211;36.6, and 16.5&#8211;51.3%, respectively. In the field, 5 viruses &#91;Cucumber mosaic virus (CMV), PVX, PVY, ToMV, and Tomato yellow top virus (TYTV)&#93; were frequently found with an incidence range of 0&#8211;13.3%, 2.6&#8211;16.7%, 0.4&#8211;13.8%, 26.1&#8211;41.3%, and 1.7&#8211;11.3%, respectively. All 5 viruses except TYTV were also detected from weed species in tomato fields or in the nearby vicinity. Of 12 commercial tomato varieties screened against CMV, PVX, PVY, and ToMV, 2 varieties (Florist and Forset) were resistant to 4 of the viruses including ToMV, for which the highest incidence was recorded in nurseries and field. These 2 varieties represent a previously undescribed and potentially useful source of resistance to the 4 inoculated viruses. 
