[table] Disease | Casual Organism ; Citrus canker | $Xanthomonas\ citri$ (bacteria) ; Grain smut $Sorghum$ | $Sphacelotheca\ sorghii$ (sub-division-Basidiomycotina) ; Red rot of sugarcane | $Colletotrichum\ falcatum$ ; Black neck or blast | $Pyricularia\ oryzae$ (sub-division-Deuteromycotina) ; Disease of rice | [/table]