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.