Pierce’s Sickness (PD) of grapevine (Vitis vinifera) is because of the bacterium Xylella fastidiosa and it is vectored by xylem sap-sucking insects, While Grapevine Pink Blotch Virus (GRBV) brings about Crimson Blotch Disorder and is also transmitted from the laboratory by alfalfa leafhopper Spissistilus festinus. The importance of anthocyanin accumulations https://lyricsdemon.com/