PIEDRA-DÍAZ, F., PALACIOS-VALDÉZ, F., LINARES-YERA, N., & VÁZQUEZ-RODRÍGUEZ, M. (1999). Economic threshold of Heliothis virescens in three Tobacco varieties from Cuba. Revista Colombiana De Entomología, 25(1), 33–36. https://doi.org/10.25100/socolen.v25i1.9749