Pierce’s Disease (PD) of grapevine (Vitis vinifera) is because of the bacterium Xylella fastidiosa and is vectored by xylem sap-sucking insects, While Grapevine Purple Blotch Virus (GRBV) triggers Purple Blotch Disease and is transmitted inside the laboratory by alfalfa leafhopper Spissistilus festinus. The importance of anthocyanin accumulations in distinctive tissues https://lyricsdemon.com/