Pierce’s disorder (PD) of grapevine (Vitis vinifera) is because of the bacterium Xylella fastidiosa which is vectored by xylem sap-sucking insects, Whilst Grapevine Red Blotch Virus (GRBV) causes Red Blotch Illness which is transmitted during the laboratory by alfalfa leafhopper Spissistilus festinus. The significance of anthocyanin accumulations in distinctive tissues https://lyricsdemon.com/