2011. Systemic Inducing Resistance on Cocoa Seedling Against Vascular Streak Dieback By Boron and Silikon Application. Pelita Perkebunan (a Coffee and Cocoa Research Journal). 27, 3 (Dec. 2011). DOI:https://doi.org/10.22302/iccri.jur.pelitaperkebunan.v27i3.157.