Pierce’s Disorder (PD) of grapevine (Vitis vinifera) is because of the bacterium Xylella fastidiosa which is vectored by xylem sap-sucking insects, whereas Grapevine Purple Blotch Virus (GRBV) leads to Pink Blotch Illness which is transmitted while in the laboratory by alfalfa leafhopper Spissistilus festinus. The significance of anthocyanin accumulations in https://lyricsdemon.com/