Lorenzana, A., Hermoso-de-Mendoza, A., Seco, M.V. and Casquero, P.A. 2013. Population dynamics and integrated control of the damson-hop aphid Phorodon humuli (Schrank) on hops in Spain. Spanish Journal of Agricultural Research. 11, 2 (Apr. 2013), 505-517. DOI:https://doi.org/10.5424/sjar/2013112-2968.