Tomato yellow leaf curl virus-Is causes a novel disease of common bean andsevere epidemics in tomato in Spain

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.