The objective of this study was to evaluate the effect of silicon (Si) applied via foliar in plum trees cv. Pluma 7 for the control of bacterial blight (Xanthomonas arboreal pv. pruni), oriental fruit moth (Grapholita molesta) and green aphid (Myzus persicae), as well as in plant development, in organic management. For this trial it was used the commercial product AgriSil ® (98% SiO2). The experiment was carried out in Guarapuava-PR, Brazil, by two consecutive cycles (2010/2011 and 2011/2012). The doses used were 0, 1, 2, 4 and 8 g L-1 of the commercial product, each two weeks. In both cycles, for the plum bacterial blight, it was verified until 85% incidence reduction, with quadratic effect of silicon doses. For the damage of oriental fruit moth, number of aphids, diameter and length of shoots no significant difference between the doses of SiO2 were found. For Si leaf content, a positive linear effect was verified in function of Si doses.
Prunus salicina; mineral nutrition; Integrated Management; agroecology
