J. Navas-castillo et al., Tomato yellow leaf curl virus-Is causes a novel disease of common bean andsevere epidemics in tomato in Spain, PLANT DIS, 83(1), 1999, pp. 29-32
Field surveys were conducted in the autumn of 1997 in the main tomato (Lyco
persicon esculentum)-growing regions of southern Spain following a severe t
omato yellow leaf curl epidemic in tomato. Tomato yellow leaf curl virus (T
YLCV)-Is was found to have spread to all regions and to coexist with TYLCV-
Sr, which has been present since 1992. TYLCV-Is was also shown to be the ca
usal agent of bean leaf crumple, a novel disease that has caused severe eco
nomic losses in fresh-market common bean (Phaseolus vulgaris) crops of sout
hern Spain since September 1997. The disease was reproduced by infecting be
ans with cloned TYLCV-Is obtained from infected tomato plants collected in
Almeria. This is the first report of bean leaf crumple disease and the firs
t report of a geminivirus in bean from Spain.