The present invention regards a methodology that can effectively eliminate the microbial load of the bacterial cells of Pseudomonas syringae pv. actinidiae (PSA), that are causative agent of bacterial canker of actinidia, being an extremely virulent bacterium which attacks all species and varieties of actinidia. The methodology described is applicable to different plants of the Genus Actinidia, and specifically to actinidia pollen that is potentially infected by PSA. The method entails two phases which involve antimicrobial action on the same plant sample: