Pierce’s Illness (PD) of grapevine (Vitis vinifera) is due to the bacterium Xylella fastidiosa and it is vectored by xylem sap-sucking insects, While Grapevine Red Blotch Virus (GRBV) will cause Red Blotch Illness and is also transmitted during the laboratory by alfalfa leafhopper Spissistilus festinus. The importance of anthocyanin accumulations https://lyricsdemon.com/