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Pierce’s sickness (PD) of grapevine (Vitis vinifera) is because of the bacterium Xylella fastidiosa which is vectored by xylem sap-sucking insects, While Grapevine Crimson Blotch Virus (GRBV) results in Purple Blotch Condition and is particularly transmitted within the laboratory by alfalfa leafhopper Spissistilus festinus. The significance of an