@article{article368fd2aa, title = {Yield of varieties of Cucurbita pepo preimmunized with mild strains of Papaya ringspot virus - type W and Zucchini yellow mosaic virus}, author = {Bonilha, Estela and Gioria, Ricardo and Kobori, Rômulo Fujito and Vecchia, Paulo Tarcísio Della and Piedade, Sônia Maria De Stefano and Rezende, Jorge Alberto Marques}, year = {2009}, doi = {10.1590/s0103-90162009000300019}, journal = {Scientia Agricola} }