23 June 2015, Los Robles San Geronimo de Naranjo (57 Km northwest of the capital) province of Alajuela, Costa Rica - Eduardo Hernandez, Research Center of Molecular and Cellular Biology at the University of Costa Rica (UCR) collects samples of yellow tomato risado virus ( T,LT,r ) (TYLCU) in a plantation of four months, JR range at a height of 1445 meters to sea level.