Leaf age influencing acquisition of Candidatus Liberibacter asiaticus by the psyllid vector, Diaphorina citri Kuwayama - Bonani, J. P.; Appezzato-da-Glória, Beatriz; Fereres, A.; Engels, F. E.; Lopes, João Roberto Spotti (International Research Conference on Huanglongbing - IRCHLB, 2008)